Wednesday, September 03, 2014

Beech B36TC Bonanza, N36ML: Fatal accident occurred December 01, 2013 in Yellow Pine, Idaho

Aviation Accident Final Report - National Transportation Safety Board: http://app.ntsb.gov/pdf

Docket And Docket Items -   National Transportation Safety Board:   http://dms.ntsb.gov/pubdms

Aviation Accident Data Summary -   National Transportation Safety Board: http://app.ntsb.gov/pdf

http://registry.faa.gov/N36ML


NTSB Identification: WPR14FA094
14 CFR Part 91: General Aviation
Accident occurred Sunday, December 01, 2013 in Yellow Pine, ID
Probable Cause Approval Date: 08/28/2014
Aircraft: BEECH B36TC, registration: N36ML
Injuries: 5 Fatal.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

The instrument-rated pilot was on a 234-nm instrument flight rules (IFR) cross-country flight over mountainous terrain; instrument meteorological conditions prevailed at the time. During the flight, the pilot notified a controller at the Air Route Traffic Control Center (ARTCC) that the airplane was picking up too much ice and requested to divert to an airport located about 96 miles ahead of his position and to descend to 11,000 feet mean sea level (msl). The controller informed the pilot that he could descend to 12,000 feet msl for terrain clearance. Over the following few minutes, the ARTCC controller notified the pilot several times that he had to maintain an altitude of 12,000 feet or above due to terrain clearance, all of which the pilot acknowledged. Following a low-altitude alert issued by the controller, the pilot stated his altitude was 11,500 feet. Subsequently, the pilot advised the controller that he was having engine problems and needed to go to an airport immediately. When the controller asked the pilot to verify his altitude, the pilot responded that he was at 10,000 feet. The controller then asked the pilot if he was able to climb, and the pilot responded “negative.” The controller advised the pilot of an airport that was 24 miles behind his position and asked if he wanted to divert. The pilot responded affirmatively and asked for guidance to the airport. About 1 minute later, the pilot advised the controller that the airplane had “just lost its engine.” The controller advised the pilot that the airport was at the pilot’s six o’clock position and suggested a heading of 253 degrees, adding that another airport was right below their position. There were no further communications with the accident airplane. Wreckage and impact signatures were found consistent with a wings-level, slightly nose-low descent into trees and terrain. Postaccident examination of the airframe and engine revealed no evidence of any preexisting mechanical malfunction that would have precluded normal operation. Airmen’s Meteorological Information (AIRMETs) for IFR and mountain obscuration conditions, low-level wind shear and turbulence, and moderate icing were issued for the flight track area and timeframe. In additional to the AIRMETs, multiple pilot reports included reports of light rime-type icing between 8,000 feet and 13,000 feet throughout the region and National Weather Service data was consistent with the pilot reports and AIRMET that were current at the time. The investigation was unable to determine whether the pilot obtained weather information regarding his planned flight. It is likely that the loss of engine power was due to a combination of structural and induction icing during the continued flight in icing conditions in an airplane that was not certified for flight in icing conditions.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
The pilot’s continued flight into known light-to-moderate icing conditions over mountainous terrain. Contributing to the accident was the loss of engine power due to induction icing. 


HISTORY OF FLIGHT 


On December 1, 2013, about 1303 mountain standard time, a Beech B36TC, N36ML, was destroyed when it impacted terrain while maneuvering near Yellow Pine, Idaho. The airplane was registered to and operated by the pilot under the provisions of Title 14 Code of Federal Regulations Part 91. The instrument rated private pilot and his four passengers were fatally injured. Instrument meteorological conditions prevailed and an instrument flight rules (IFR) flight plan was filed for the personal flight. The 234 nautical mile cross-country flight originated from Baker City Municipal Airport (BKE) Baker City, Oregon, about 1222 with an intended destination of Butte, Montana.

Information provided from the Federal Aviation Administration (FAA) revealed that the flight departed from BKE under visual flight rules. At 1226, when the aircraft was about 10 miles south of BKE at an altitude of about 6,200 feet, the pilot contacted the FAA Air Route Traffic Control Center (ARTCC) requesting to activate an IFR flight plan to Butte, Montana. At 1230, the controller issued the accident airplane the BKE altimeter and identified the airplane was located about 13 miles south of the BKE VOR. The controller then cleared the flight to Butte as filed and directed the pilot to climb and maintain 13,000 feet. The pilot acknowledged the clearance and altitude. The controller followed with a clearance for the flight to proceed direct to the Donnelly VOR.

At 1240, the controller advised the pilot that the McCall Municipal Airport (MYL), McCall, Idaho, altimeter setting was 30.04. The pilot acknowledged about one minute and six seconds later. At 1256, the controller asked the pilot to confirm he was level at 13,000 and established on victor airway 121. The pilot responded with "negative, three six mike lima's picking up too much ice uh we'd like to divert to uh Salmon." Shortly after, the pilot requested to descend to 11,000 feet. The controller advised the pilot to maintain 12,000 feet for terrain clearance. The pilot acknowledged 12,000 feet.

At 1257, the controller then asked the pilot if he would like to divert and the pilot subsequently verified that he would like to divert to Salmon. The controller cleared the pilot to Salmon via direct to the Salmon VOR and again instructed the pilot to maintain 12,000 for terrain clearance. The pilot acknowledged with "maintain one two thousand six mike lima."

At 1300, the controller asked the pilot to confirm he was still on victor airway 121 and the pilot responded with "establishing victor 121." The controller directed the pilot to turn right 15 degrees to be established on the airway. The pilot acknowledged. The controller then issued the pilot a low altitude alert, instructing him to check his altitude immediately. The controller stated that the minimum IFR altitude was 11,900 and instructed the pilot to climb and maintain 12,000 feet immediately. When asked to say altitude, the pilot advised that he was at 11,500 and climbing. The controller reiterated to the pilot that they had to maintain 12,000 feet for terrain.

At 1301:04, the pilot advised the controller that he was having engine problems and 15 seconds later advised that he needed to "go to three uniform two immediately." The controller asked the pilot to verify his altitude, which the pilot responded he was at 10,000 feet. The controller then asked the pilot if he was able to climb, and the pilot responded "negative." The controller advised the pilot that MYL was 24 miles behind him and asked if he wanted to divert. The pilot responded affirmatively and asked for guidance. The controller suggested a heading of 253 degrees and reminded the pilot that the minimum IFR altitude was 11,900.

At 1302, the pilot reported that "36ML just lost its engine" and asked the controller to "say again heading for six mike lima." The controller advised that MYL was at the pilot's six o'clock position and suggested a heading of 253 degrees, adding that 3U2 was right below their position. The controller stated that he had information for the airport and asked the pilot if he'd like that information. There was an unintelligible response that could not be associated with any specific aircraft. The controller attempted to relay communications via other aircraft in the area and broadcast 3U2 airport information to N36ML in the blind. There were no further communications with N36ML.

The FAA subsequently issued an Alert Notification (ALNOT) at 1328. The United States Air Force Rescue Coordination Center (ARCC), Civil Air Patrol, local law enforcement, Idaho Air National Guard, Idaho Department of Aeronautics, and volunteers commenced search and rescue operations throughout the area where radar contact was lost. There were no reported ELT signals within the area of the last radar target.

The wreckage was located in snow covered wooded mountainous terrain on January 10, 2014 by a ground search team about 1.5 miles east of the last recorded radar target.

PERSONNEL INFORMATION

The pilot, age 51, held a private pilot certificate with an airplane single-engine land and instrument airplane ratings. A second-class airman medical certificate was issued to the pilot on March 27, 2013, with the limitation stated "must wear corrective lenses." The pilot reported that he had accumulated a total of 1,050 total flight hours at the time of his most recent medical application. The pilot's logbook was not located.

AIRCRAFT INFORMATION

The six-seat, low-wing, retractable-gear airplane, serial number (S/N) EA-375, was manufactured in 1983. It was powered by a Continental Motors TSIO-520-UB3F, serial number 527486, rated at 300 horsepower. The airplane was also equipped with a McCauley 3A32C406-C adjustable pitch propeller.

Review of partial copies of the aircraft logbooks revealed that the most recent annual inspection was completed on June 3, 2013, at a tach time of 1,611.85 hours. The engine was overhauled on March 19, 2010, and subsequently installed on the airframe on April 1, 2010, at a tach time of 1,275.67 hours.

Review of the Raytheon Aircraft Company model B36TC pilot operating handbook, section 2, heading KINDS OF OPERATIONS states in part "…flight in icing conditions prohibited."

Section 3, Emergency Procedures, revealed that under the heading "BLOCKED INDUCTION SYSTEM", a checklist included the following:

"1. Alternate Air T-Handle….PULL AND RELEASE
2. See INDUCTION SYSTEM BLOCKAGE later in this section. "

The heading titled "INDUCTION SYSTEM BLOCKAGE", stated in part "…if the alternate induction air door becomes stuck in the closed position, it can be opened by: ALT AIR PULL & RELEASE T-Handle (lower left sub panel)…….PULL AND RELEASE." The section further states "with the induction air filter completely blocked, the alternate air opening will provide sufficient air to allow the engine to develop maximum continuous power up to approximately 13,000 feet. Above that altitude, the manifold pressure will drop at a rate of approximately 1 inch per 1,000 feet."

Section 7, Systems Description, heading INDUCTION SYSTEM ICING states in part "…the possibility of induction system icing is reduced by the non-icing characteristics of the Bonanza's fuel injected engine and an automatic alternate induction air source. Under certain conditions, however, impact ice can form at several points in the induction system. If the air intake or filter becomes clogged with ice, a spring-loaded door in the air intake duct will open automatically and the induction system will operate on alternate air. If the alternate air source door becomes frozen in the closed position, a pull-and-release T-handle is provided to force the door open. With a completely blocked induction filter, full power can be expected up to approximately 13,000 feet."

The airplane was last refueled at Baker Airport's self-serve pump on November 27, 2013. The amount of fuel was undetermined due to a system recording error.

METEOROLOGICAL INFORMATION

A National Transportation Safety Board (NTSB) staff meteorologist prepared a factual report for the area and timeframe surrounding the accident.

The National Weather Service (NWS) regional radar mosaic for 1300 depicted a large area of echoes to the north of the accident site and no significant echoes over the accident site or over the McCall area, which was reporting light rain at the time of the image. The NWS Weather Depiction Chart for 1200 depicted an area of IFR conditions by a shaded contour over the Washington and Oregon coasts, and a separate area of eastern Washington and northern Idaho, surrounded by an area of marginal visual flight rules (MVFR) conditions. A second area of MVFR conditions was depicted extending over eastern Oregon, southern Idaho, and into western Wyoming, which included the accident site. Two small areas of IFR conditions were embedded within the region.

The closest weather reporting facility to the accident site was from McCall Municipal Airport
(MYL), McCall, Idaho, located approximately 27 miles west at an elevation of 5,024 feet and along the immediate route of flight. At 1251, recorded weather conditions were wind from 140 degrees at 11 knots, visibility 9 miles in light rain, ceiling overcast at 2,400 feet above ground level (agl), temperature 2 degrees Celsius (C), dew point 0 degrees C, altimeter 30.04 inches of mercury (Hg), remarks: automated observation system, sea level pressure 1017.9-hPa, hourly precipitation 0.03 inches, temperature 2.2 degrees C, dew point 0 degrees C.

The closest upper air sounding or rawinsonde observation (RAOB) was from the NWS Boise
(BOI), Idaho, located approximately 90 miles south of the accident site at an elevation of 2,867 feet. The 1700 sounding depicted a surface based temperature inversion to 1,500 feet agl with the lifted condensation level (LCL) immediately above at 1,914 feet agl (4,781 feet msl), and a convective condensation level (CCL) 7 at 4,988 feet agl (7,855 feet msl). The expected top of the clouds was at 13,465 feet. The freezing level was identified at 8,455 feet with the sounding indicating a relative humidity greater than 80 percent from 8,000 to 12,000 feet, with temperatures below freezing that supported icing conditions.

At the accident airplane cruising level of 13,000 feet the wind was from 300 degrees at 53 knots with a temperature of -8.5 degrees C, with a potential for trace of rime type icing. The icing potential increased at lower levels and reached a 77% probability of moderate clear type icing at 8,500 feet. Between 12,000 and 11,000 feet there was an approximately 80% probability of light clear icing with relative humidity of 95 percent and temperatures between -7 degrees and -5 degrees C.

The Geostationary Operational Environmental Satellite number 15 (GOES-15) satellite image for 1300 depicted several bands of low, mid, and high clouds over the area. The radiative cloud top temperature over the last radar target was -59.16 degrees C, which corresponded to cloud tops near 35,000 feet and indicated cirrostratus clouds. Several lenticular cloud bands were also observed supporting mountain wave activity over Oregon, southern Idaho, and northern Nevada, with overcast clouds over the accident site.

There were 6 pilot reports of light to moderate rime icing conditions below 18,000 feet scattered over Idaho prior to the accident, and 9 reports after the time of the accident. There were also several reports of mountain wave activity and of light to moderate turbulence at altitudes above 18,000 feet. After the time of the accident there were also 2 urgent pilot reports from aircraft reporting moderate to severe turbulence in the vicinity of Idaho Falls over southern Idaho.

A full series of Airmen's Meteorological Information (AIRMETs) issued by the NWS were current for the timeframe and intended route of flight. The active AIRMETS included AIRMET Zulu for moderate icing, AIRMET Sierra for mountain obscuration and AIRMET Tango for low-level windshear and turbulence.

The pilot of N36ML logged on to the Direct Users Access Terminal System (DUATS) and filed an instrument flight plan at 1200 on December 1 with a requested altitude of 13,000 feet. No formal weather briefing information was requested on the DUATS system and there was no record of any contact with the FAA contract Flight Service Station. It is unknown if the pilot utilized any additional sources of weather prior to the flight.

For further information, see the weather study report within the public docket for this accident.

WRECKAGE AND IMPACT INFORMATION

Examination of the accident site by representatives of Textron Aviation under the supervision of the NTSB IIC revealed the airplane impacted terrain about 1.6 miles northwest of the Johnson Creek Airport (3U2) at an altitude of about 7,619 feet msl. The initial point of contact was identified by a group of about 5 topped trees, about 40 feet in height. A swath of 7 topped trees, each reduced in height as the debris path progressed on a heading of about 078 degrees magnetic. Portions of right and left wing, and tail cone were observed within the swatch of topped trees.

The aft portion of the fuselage, vertical stabilizer, rudder, and elevators were located about 104 feet from the initial point of contact. A large impact crater was observed immediately adjacent to the aft fuselage. Portions of left and right wing structure were observed between the aft fuselage and the forward portion of the fuselage and engine, which was located about 138 feet from the initial point of contact. All major structural components of the airplane were located within the wreckage debris path.

The engine and remaining attached forward airframe structure was found inverted and exhibited fire damage. A portion of the right inboard wing was found folded upward and positioned over the forward fuselage structure. The aft portion of the fuselage exhibited fire damage. The cockpit area was fire and impact damaged. Continuity was established from the cockpit engine controls forward to the engine.

The wreckage was recovered to a secure location for further examination.

Examination of the recovered wreckage was conducted at the facilities of SP Aircraft, Boise Idaho, on June 2, 2014 by the NTSB IIC and representatives from Textron Aviation and Continental Motors.

Examination of the recovered airframe revealed that the fuselage was fragmented into multiple sections and exhibited fire damage. The engine remained attached to the airframe via various wires and hoses. The induction system from the induction air filter aft was intact and fire damaged. The alternate induction air door remained attached and exhibited thermal damage. The spring was intact and remained attached to its respective mounts. The control cable was thermally damaged and remained attached to the actuator arm, however, it was separated about an inch from the attach point. The remaining portion of the cable was continuous to the cockpit area. The actuator arm functioned by hand and the alternate induction air door opened and closed freely.

The instrument panel was thermally damaged with multiple instruments displaced.

Partial flight control continuity was established throughout the airframe to all primary flight controls. Multiple separations in the flight control system were observed. All separations exhibited signatures consistent with tension overload.

The right wing was displaced from the fuselage and separated into multiple sections. The leading edge structure of the inboard portion of the right wing from the flap aileron junction to the wing root was displaced to the main wing spar. The left wing was displaced from the fuselage, separated into multiple sections, and exhibited slight thermal damage. The leading edge structure of the left wing from the flap aileron junction was separated from the main spar inboard to the wing root. A circular impression was observed on the outboard portion of the separated leading edge structure.

The vertical stabilizer was separated from the airframe. The leading edge of the vertical stabilizer exhibited a circular impression on the left side from the base of the stabilizer to about mid height. The right side of the vertical stabilizer exhibited buckling from the impression aft to the aft spar. The rudder was separated from all its mounts. The rudder was bent and buckled throughout and exhibited fire and thermal damage.

The left horizontal stabilizer was separated from the fuselage. The inboard portion of the left stabilizer was bent and buckled from the leading edge to the trailing edge. The left stabilizer aft spar was mostly separated from the stabilizer. The right horizontal stabilizer was separated from the fuselage. The leading edge of the right horizontal stabilizer from the root to about mid span was torn away from the spar and bent downward. A portion of the right horizontal stabilizer leading edge skin was compressed aft to the spar and exhibited a circular impression. The leading edge structure exhibited a downward circular impression at about mid span.

Examination of the recovered Continental TSIO-520-UB (3) engine revealed that the starter and the right magneto were separated from their respective mounts. All six cylinders remained attached. The exhaust remained intact and exhibited impact damage. The induction system for cylinders 2, 4, and 6, were impact damaged and 1, 3, and 5 were intact. The induction crossover balance tube was crushed upward. The top sparkplugs, fuel pump, vacuum pump, and starter adapter were removed. All six cylinders were examined internally using a lighted borescope and were unremarkable. The engine was rotated by hand using a hand tool attached to the crankshaft propeller flange. Rotational continuity was established throughout the engine and valve train. Thumb compression and suction was obtained on all six cylinders.

The top spark plugs were removed and examined. The number 1 and 6 spark plugs were damaged. All six spark plugs were oil coated and exhibited normal wear signatures.

The turbocharger was intact and remained attached to the engine and exhibited thermal damage. The turbocharger would not rotate by hand, however, debris was observed within the turbine side. The waste gate was intact and thermally damaged. The turbo controller was intact and thermally damaged. The relief valve was intact and thermally damaged.

The propeller was separated from the crankshaft propeller flange. Propeller blade No. 1 was separated from the propeller hub and exhibited slight twisting near the blade tip and chordwise striations at about midspan. Propeller blade No. 2 was intact and exhibited slight aft bending . Propeller blade No. 3 was bent aft about 12 inches from the blade tip and exhibited slight leading edge gouging at the tip.

No evidence of any preexisting mechanical malfunctions was observed with the recovered airframe and engine that would have precluded normal operation.

For further information, see the NTSB Accident Site, Recovered Airframe, and Recovered Engine Examination Summary Report within the public docket for this accident.

MEDICAL AND PATHOLOGICAL INFORMATION

The Valley County Coroner conducted an autopsy on the pilot on January 17, 2014. The medical examiner determined that the cause of death was "…severe blunt force trauma."

The FAA's Civil Aeromedical Institute (CAMI) in Oklahoma City, Oklahoma, performed toxicology tests on the pilot. According to CAMI's report, volatiles, and drugs were tested, and had positive results for 46 (mg/dL, mg/hg) Ethanol detected in Muscle and no Ethanol was detected in Liver

TESTS AND RESEARCH

A Garmin GPSMap 396 was recovered from the wreckage and subsequently shipped to the NTSB Vehicle Recorders Laboratory, Washington, DC for further examination. Power was applied to the GPS unit and the data was successfully downloaded. The GPS unit contained 40 recorded sessions from July 13, 2013 to December 1, 2013.

Two flights were recorded on November 27, 2013, one from BKE to Butte, Montana, and one returning to BKE. The tracks to and from Butte were predominantly a direct course over mountainous terrain.

Review of the track log from the day of the accident depicted a departure from runway 8 at BKE. The flight continued on a southerly course until turning to an easterly course at 1231. The data depicted that the flight leveled off at an altitude of about 13,000 feet, at 1237. The flight continued on an easterly heading with altitudes fluctuating around 13,000 feet and groundspeeds between 200 and 228 knots. At 1244, a decrease in groundspeed was observed while altitude remained about 12,900 feet. For the following 6 minutes, the recorded groundspeed decayed to the slowest recorded groundspeed of 165 knots, however, it then increased to a maximum of 200 knots while the recorded altitude fluctuated between 12,800 and 13,000 feet.

The data further depicted that at 1953, a decrease in groundspeed and a descent from an altitude of about 13,000 feet started. The descent continued for about 4 minutes before a climb was initiated from the lowest recorded altitude of 11,591 feet. Throughout the following 2 minutes, the flight ascended to an altitude of about 12,014 feet and groundspeed of 139 knots. The data then depicted a constant descent and fluctuating groundspeeds between 123 knots and 179 knots for about 4 minutes to the end of the recorded GPS data. During the last 2 minutes of recorded GPS data, heading changes to the southeast, northeast, and east were observed. The last recorded GPS position was located about 0.19 miles west of the accident site at an altitude of 7,989 feet, groundspeed of 123 knots, and ground track of 083.5 degrees.

For further information, see the Recorders Lab GPS Report and attachments within the public docket for this accident.

 NTSB Identification: WPR14FAMS1
14 CFR Part 91: General Aviation
Accident occurred Sunday, December 01, 2013 in Yellow Pine, ID
Aircraft: BEECH B36TC, registration: N36ML
Injuries: 5 Fatal.

This is preliminary information, subject to change, and may contain errors. Any errors in this report will be corrected when the final report has been completed. NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

On December 1, 2013, at 1303 mountain standard time, a Beech B36TC, N36ML, lost radar and radio communication in the vicinity of Johnson Creek Airport (3U2), Yellow Pine, Idaho. The airplane was registered to and operated by the pilot under the provisions of Title 14 Code of Federal Regulations Part 91. The instrument rated private pilot and his four passengers are missing and the airplane has not been located. Instrument meteorological conditions prevailed and an instrument flight rules flight plan was filed for the personal flight. The cross-country flight originated from Baker City, Oregon, about 1225 with an intended destination of Butte, Montana.

Preliminary information provided from the Federal Aviation Administration (FAA) Air Route Traffic Control Center (ARTCC) revealed that the pilot was issued an IFR clearance to Butte, Montana with a cruise altitude of 13,000 feet mean sea level (msl). As the flight was about 15 miles east of the Donnelly Very High Frequency Omnidirectional Range (VOR), the controller noticed that the airplane deviated from his course and questioned the pilot. The pilot reported that he was picking up significant icing and requested to descend to 11,000 feet msl. The controller subsequently cleared the pilot to descend to the minimum vectoring altitude (MVA) of 12,000 feet msl.


Shortly after, the pilot requested to divert to Salmon, Idaho, and was subsequently issued clearance to the Lemhi County Airport, Salmon, Idaho. The controller observed the airplane descend below 11,900, which was the minimum safe altitude warning (MSAW) and issued an alert to the pilot. The pilot informed the controller he was having engine problems and was unable to maintain altitude and requested to divert to McCall, Idaho. The controller suggested headings for McCall and provided the location of Johnson Creek Airport. Subsequently, radar and radio contact was lost about 0.5 miles northeast of 3U2 at an altitude of 10,100 feet msl. The FAA issued an alert notice (ALNOT) at 1328.


Click here to see live web cam from Johnson Creek Airstrip.

SAN JOSE -- Ice buildup in the engine of a small plane caused a crash in the Idaho backcountry that claimed the lives of a San Jose tech executive and four relatives in December, according to a report from the National Transportation Safety Board.

The agency's probable-cause report, released Aug. 28, says the single-engine Beechcraft Bonanza aircraft flown by 51-year-old Dale Smith was "not certified for icing conditions" he and his passengers encountered Dec. 1 while flying from Baker City, Ore., to Butte, Mont. after celebrating the Thanksgiving holiday.

Smith told air traffic controllers that the plane was picking up too much ice and asked to be diverted to an airport 96 miles away. The NTSB said the pilot could not heed a controller's instructions to maintain an altitude of 12,000 feet to avoid the mountainous terrain, descending to 10,000 feet while he detailed engine problems over the radio.

The controller was directing the plane to a different airport 24 miles away when Smith reported it "just lost its engine." The controller then tried to alert them to a small airport below the plane's position when communications ceased.

The NTSB reported investigators could not determine if Smith knew about the bad weather he would be encountering and concluded the crash was likely due to "the pilot's continued flight into known light-to-moderate icing conditions over mountainous terrain. Contributing to the accident was the loss of engine power due to induction icing."

Steep, rough terrain and snow prevented the wreckage from being found until Jan. 10, 1.6 miles northwest of Johnson Creek Airport, and only after Smith's brother made a last-ditch attempt to search for the pilot and Smith's son Daniel, 26, his wife, Sheree, as well as daughter Amber, 20, and her fiance, Jonathan Norton, who were to be married Jan. 4.

The victims were laid to rest during a February ceremony in San Jose, where Smith and his family lived.


- Source:  http://www.mercurynews.com




The Smith family photographed during their Thanksgiving holiday at a rented ranch near Baker City, Oregon. Left to right: son Craig Smith; Janis Smith; Dale Smith; son Nathan Smith; daughter Amber Smith and fiance Jonathan Norton; son-in-law Michael Christensen and wife Crystal; son Daniel Smith and wife Sheree. 


 


 
Dale Smith


Five hearses carry caskets of the family which died in a Dec. 1 plane crash in Idaho's backcountry. 



 Flowers on the casket of Silicon Valley tech executive and avid pilot Dale Smith are placed in the hearse after the funeral for Smith and four family members at the LDS Church in San Jose, Calif., on Saturday, Feb.1, 2014.



At left, Dale Smith's daughter Crystal Christensen waits as caskets are ready to be placed in the hearses after the funeral for Silicon Valley tech executive and avid pilot Dale Smith and four family members at the LDS Church in San Jose, Calif., on Saturday, Feb.1, 2014. 



Caskets are ready to be placed in the hearses at the funeral for Silicon Valley tech executive and avid pilot Dale Smith and four family members at the LDS Church in San Jose, Calif., on Saturday, Feb.1, 2014. 



At right, Dale Smith's father, Steve Smith is consoled by Ken Elsey after the funeral for Dale Smith and four family members at the LDS Church in San Jose, Calif., on Saturday, Feb.1, 2014 



 
Jonathon Norton and Amber Smith 
 Courtesy photo



The Johnson Creek Airstrip webcam shows some snow in the afternoon on December 2, 2013. Inset: Image of Dale Smith 

 



Volunteer Arthur Stock lives in a renovated barn he finished in rural Valley County


 Arthur Stock 
 Credit: Mike di Donato / KTVB



 

Stock works with volunteers to identify areas to search for the missing plane 










Gearing up for a night in the mountains















Credit: Idaho National Guard
 The Idaho Army National Guard UH-60 Black Hawk 


Credit: Idaho National Guard 
The slope of the landing zone forced the helicopter crew to to a running onload/offload since the helicopter couldn't actually land. The rotors were spinning at all times. 


Credit: Idaho National Guard
The terrain near Johnson Creek, with landing site



Credit: Idaho National Guard

The terrain near Johnson Creek 


Credit: Idaho National Guard
The helicopter landing zone with responders on the ground.



Credit: Idaho National Guard 
Foggy weather conditions were a factor in the operation.



Boise pilots Bill McGlynn, left, and Jim Hudson, right, gathered around at pilot Kevin Bentley's Meridian home to talk about the huge public effort to find Dale Smith’s ill-fated plane. The trio shot video and pored over images. 



 “Everybody came together on this search,” said Pineshi Gustin, of Vancouver, B.C., of the effort to find the plane. “It wasn’t just one person.”  


Dale and Janis Smith, center, surrounded by their family in 2012: In the back row are, from left, son Daniel Smith, Daniel's wife Sheree, son-in-law Michael Christensen and daughter Crystal Christensen. Bottom row: daughter Amber Smith, son Nathan and son Craig Smith. Dale, Amber, Daniel and Sheree were on the plane that disappeared Dec. 1. The fifth passenger was Amber's fiance, Jonathan North.
PROVIDED BY SMITH FAMILY


Dale Smith


Amber Smith and Norton are supposed to be married on Jan. 4, and a friend of Norton's sent NBC Bay Area their engagement photos that he took in October in a wheat field and on the sand dunes.


 Sheree and her husband, Daniel Smith.
 

Jonathan Norton and Amber Smith were planning to be married Jan. 4.


 Sheree and her husband, Daniel Smith



 
  Search crews for the Smith plane go out with help from a helicopter and snowmobiles at Stibnite Mine near Cascade, Idaho.




 
  


A mine worker who was in the backcountry says he heard the plane drop. 



Image courtesy of Johnson Creek Airport WebCam






Amber Smith and  her fiancé, Jonathan Norton


 












BYU student Jonathon Norton and his fiancee Amber Smith




Credit: Idaho Transportation Department



Credit: Idaho Transportation Department



Credit: Idaho Transportation Department



Credit: Idaho Transportation Department



Credit: Idaho Transportation Department


Credit: Idaho Transportation Department














Johnson Creek Airstrip



 


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