Additional Participating Entities:
Federal Aviation Administration / Flight Standards District Office; Fairbanks, Alaska
Lycoming Engines; Williamsport, Pennsylvania
Aviation Accident Factual Report - National Transportation Safety Board: https://app.ntsb.gov/pdf
Investigation Docket - National Transportation Safety Board: https://dms.ntsb.gov/pubdms
https://registry.faa.gov/N7511H
Location: Healy, AK
Accident Number: ANC18FA071
Date & Time: 09/22/2018, 1600 AKD
Registration: N7511H
Aircraft: Piper PA-12-150
Aircraft Damage: Substantial
Defining Event: Unknown or undetermined
Injuries: 2 Fatal
Flight Conducted Under: Part 91: General Aviation - Personal
On September 22, 2018, the wreckage of a tailwheel-equipped Piper PA-12 airplane, N7511H, was located in remote mountainous terrain about 35 miles east of Healy, Alaska. The private pilot and the passenger were fatally injured, and the airplane was substantially damaged by impact forces and a postcrash fire. The airplane was registered to the pilot who was operating it as a Title 14 Code of Federal Regulations Part 91 personal flight. The flight departed from Fairbanks International Airport (FAI), Fairbanks, Alaska, on September 15, 2018, and no flight plan had been filed.
The purpose of the flight was to fly to the Alaska Range, which is a mountain range located about 50 miles south of Fairbanks, where the pilot and his passenger would hunt sheep. No communications from the pilot, such as from a satellite phone or a satellite communication device, were received by the family after the pilot's departure from FAI.
After the pilot did not report to his place of employment on September 19, a Federal Aviation Administration (FAA) alert notice "ALNOT" was issued at 1620 Alaska daylight time, and an extensive search and rescue (SAR) operation began the next day. The operation consisted of aerial SAR assets from multiple agencies, including the Alaska Air National Guard, the Alaska Army National Guard, the Civil Air Patrol, and the Alaska State Troopers, as well as several individual volunteers. The accident airplane was located by a volunteer, and an Alaska Army National Guard helicopter responded to the accident site and the aircrew found both occupants deceased inside of the wreckage.
Pilot Information
Certificate: Private
Age: 45, Male
Airplane Rating(s): Single-engine Land; Single-engine Sea
Seat Occupied:
Other Aircraft Rating(s): None
Restraint Used:
Instrument Rating(s): None
Second Pilot Present: No
Instructor Rating(s): None
Toxicology Performed: Yes
Medical Certification: Class 3 With Waivers/Limitations
Last FAA Medical Exam: 01/16/2018
Occupational Pilot: No
Last Flight Review or Equivalent:
Flight Time: (Estimated) 128.8 hours (Total, all aircraft), 77.5 hours (Pilot In Command, all aircraft)
Aircraft and Owner/Operator Information
Aircraft Make: Piper
Registration: N7511H
Model/Series: PA-12-150
Aircraft Category: Airplane
Year of Manufacture: 1946
Amateur Built: No
Airworthiness Certificate: Normal
Serial Number: 12-372
Landing Gear Type: Tailwheel
Seats: 3
Date/Type of Last Inspection: 06/12/2018, Annual
Certified Max Gross Wt.: 1750 lbs
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time: 4141.4 Hours as of last inspection
Engine Manufacturer: Lycoming
ELT: Installed, not activated
Engine Model/Series: O-320-A2B
Registered Owner: On file
Rated Power: 150 hp
Operator: On file
Operating Certificate(s) Held: None
The airplane was equipped with a Garmin Aera GPS device, which was sent to the National Transportation Safety Board's (NTSB) Vehicle Recorder Division Laboratory in Washington, DC. The device is capable of storing data in nonvolatile memory. However, the circuit board was delaminated due to the thermal damage, and most of the components were burned off. The extent of the damage precluded recovery of the data.
The airplane was also equipped with an emergency locator transmitter (ELT), which did not broadcast after the accident. The ELT sustained postimpact fire damage, so the NTSB could not definitively determine why the ELT did not broadcast.
Meteorological Information and Flight Plan
Conditions at Accident Site: Unknown
Condition of Light: Not Reported
Observation Facility, Elevation: PAHV, 12944 ft msl
Distance from Accident Site: 33 Nautical Miles
Observation Time:
Direction from Accident Site: 267°
Lowest Cloud Condition:
Visibility:
Lowest Ceiling:
Visibility (RVR):
Wind Speed/Gusts:
Turbulence Type Forecast/Actual:
Wind Direction:
Turbulence Severity Forecast/Actual:
Altimeter Setting:
Temperature/Dew Point:
Precipitation and Obscuration:
Departure Point: Fairbanks, AK (FAI)
Type of Flight Plan Filed: None
Destination:
Type of Clearance: Unknown
Departure Time: AKD
Type of Airspace: Class G
The exact meteorological conditions before and at the time of the accident could not be determined.
Wreckage and Impact Information
Crew Injuries: 1 Fatal
Aircraft Damage: Substantial
Passenger Injuries: 1 Fatal
Aircraft Fire: Fire At Unknown Time
Ground Injuries: N/A
Aircraft Explosion: Unknown
Total Injuries: 2 Fatal
Latitude, Longitude: 63.900278, -147.733333
The wreckage of the airplane was located in a remote snow-covered mountainous valley with rocks, alder trees, and a small creek. The wreckage was positioned on the east side of the creek on a heading of about 220° and at an elevation of about 4,300 ft mean sea level. Most of the wreckage showed evidence of a postimpact fire. The airplane came to rest upright, with the fuselage banking to the right, both wings indicating forward/aft crushing, and the tail slightly elevated with little impact damage.
All of the major structural components of the airframe were located at the accident site. An examination of the airframe revealed no pre-impact mechanical malfunctions or failures that would have precluded normal operation.
The engine was examined after the recovery of the wreckage. The examination revealed no pre-impact mechanical malfunctions or failures that would have precluded normal operation.
During examination, the AFT right wing spar exhibited signs of compression bending, with the right wing forward spar exhibiting aft bending. The AFT left wing spar bolt indicated a failure in tension, and the left wing forward spar indicated forward bending.
Medical And Pathological Information
The State of Alaska Medical Examiner's Office, Anchorage, Alaska, conducted an autopsy of the pilot. According to the autopsy report, the cause of death for the pilot was multiple blunt force injuries. The report also indicated that there was no evidence of soot-like material found in the pilot's airway.
Toxicology testing performed at the FAA Forensic Sciences Laboratory found that the pilot's specimens were negative for drugs and ethanol.
Additional Information
Search and Rescue
The FAA's Aeronautical Information Manual (AIM) discusses SAR operations and states in part the following: SAR is a lifesaving service provided through the combined efforts of the federal agencies' signatory to the National SAR Plan, and the agencies responsible for SAR within each state. Operational resources are provided by the U.S. Coast Guard, DOD [Department of Defense] components, the Civil Air Patrol, the Coast Guard Auxiliary, state, county and local law enforcement and other public safety agencies, and private volunteer organizations. Services include search for missing aircraft, survival aid, rescue, and emergency medical help for the occupants after an accident site is located.
Flight Plan
The AIM discusses the importance of filing a flight plan in case of an emergency or if an aircraft is overdue and states in part the following:
A filed flight plan is the most timely and effective indicator that an aircraft is overdue. Flight plan information is invaluable to SAR forces for search planning and executing search efforts.
Prior to departure on every flight, local or otherwise, someone at the departure point should be advised of your destination and the route of flight if other than direct. Search efforts are often wasted, and rescue is often delayed because of pilots who thoughtlessly take off without telling anyone where they are going. File a flight plan for your safety.
View of airplane from front left.
View of airplane from right rear.
View of airplane from front.
Location: Healy, AK
Accident Number: ANC18FA071
Date & Time: 09/22/2018, 1600 AKD
Registration: N7511H
Aircraft: Piper PA 12
Injuries: 2 Fatal
Flight Conducted Under: Part 91: General Aviation - Personal
On September 22, 2018, the wreckage of a Piper PA-12 airplane, N7511H, was located in an area of mountainous terrain about 35 miles east of Healy, Alaska. The accident occurred at an unknown time between September 15 and September 22. The private pilot and the passenger sustained fatal injuries, and the airplane sustained substantial damage. The airplane was registered to the pilot, who operated the airplane under the provisions of Title 14 Code of Federal Regulations Part 91 as a visual flight rules personal flight when the accident occurred. With no definitive accident date at this time, exact meteorological conditions are unknown, and no flight plan had been filed.
According to family and friends of the two occupants, the airplane departed from Fairbanks International Airport on September 15 in support of a sheep hunt in the Alaska Range. The family reported that it was not uncommon for the pilot to take off and not tell anyone where he was going. When the airplane did not return, family members reported it missing, and the Federal Aviation Administration (FAA) issued an alert notice (ALNOT) on September 19 at 1620 Alaska daylight time. No emergency locator transmitter (ELT) signal was received.
After being notified of an overdue airplane, search and rescue personnel from the Air National Guard's 210th Air Rescue Squadron, Alaska Army National Guard, Civil Air Patrol, Alaska State Troopers and Good Samaritans, began a search for the missing airplane.
On September 22, about 1600, searchers located the incinerated wreckage of the accident airplane, but poor weather prevented searchers from reaching the site until the next morning. The following morning the crew of an Air National Guard HH-60G helicopter reached the accident site and confirmed that both occupants had died.
On September 26, two National Transportation Safety Board investigators reached the accident site. The airplane was located in an area of mountainous, tree and snow-covered terrain at an elevation of 4,300 ft mean sea level. A postcrash fire incinerated a large portion of the airplane's fuselage and portions of both wings.
The airplane was equipped with a Lycoming O-320 series engine.
A detailed wreckage examination is pending recovery.
Aircraft and Owner/Operator Information
Aircraft Make: Piper
Registration: N7511H
Model/Series: PA 12 No Series
Aircraft Category: Airplane
Amateur Built: No
Operator: On file
Operating Certificate(s) Held: None
Meteorological Information and Flight Plan
Conditions at Accident Site:
Condition of Light:
Observation Facility, Elevation:
Observation Time:
Distance from Accident Site:
Temperature/Dew Point:
Lowest Cloud Condition:
Wind Speed/Gusts, Direction:
Lowest Ceiling:
Visibility:
Altimeter Setting:
Type of Flight Plan Filed: None
Departure Point: Fairbanks, AK (FAI)
Destination:
Wreckage and Impact Information
Crew Injuries: 1 Fatal
Aircraft Damage: Substantial
Passenger Injuries: 1 Fatal
Aircraft Fire: Fire At Unknown Time
Ground Injuries: N/A
Aircraft Explosion: Unknown
Total Injuries: 2 Fatal
Latitude, Longitude: 63.900278, -147.733333
Timothy Mark Sonnenberg
May 20, 1973 - September 23, 2018
Jason Dean Roberts
January 12, 1975 - September 23, 2018
Timothy Sonnenberg, 45, of Fairbanks, and Jason Roberts, 43, of North Pole, are believed to have died in the small aircraft that went down near the Japan Hills south of Fairbanks in the area of Wood River and Chutes Creek, according to trooper spokeswoman Megan Peters.
They were reported overdue on Friday from a hunting trip to the Nenana River, a trooper report stated. The men reportedly left to hunt sheep Sept. 15; their last known coordinates were near the west fork of the Delta River.
A search involving the Civil Air Patrol and other volunteers commenced. A pilot on Saturday reported seeing an aircraft south of Gold Creek that appeared to have burned.
A military helicopter was sent to the site and confirmed Sunday that it was Sonnenberg’s plane. Authorities launched a body recovery effort, according to troopers.
Family members of both men have been notified, troopers stated.
An online Federal Aviation Administration database shows Sonnenberg flew a Piper PA-12, a fixed-wing, single-engine aircraft built in 1946. He was a licensed pilot though not instrument rated, according to another FAA database.
Sonnenberg owned TS Construction in Fairbanks. Roberts coached wrestling at North Pole High School, according to his Facebook page.
A GoFundMe campaign that was started Saturday to raise money for fuel for the search effort drew more than $25,000 in less than 24 hours.
Attempts on Sunday to get information from the National Transportation Safety Board, which investigates every civil aviation accident in the United States, were unsuccessful.
Original article can be found here ➤ http://www.newsminer.com
Date: 16-JUL-18
Time: 22:45:00Z
Regis#: N7511H
Aircraft Make: PIPER
Aircraft Model: PA 12
Event Type: INCIDENT
Highest Injury: NONE
Aircraft Missing: No
Damage: MINOR
Activity: UNKNOWN
Flight Phase: LANDING (LDG)
Operation: 91
City: FAIRBANKS
State: ALASKA
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