Wednesday, October 25, 2017

Schweizer G-164B, registered to and operated by Haley Flying Service, N8494K: Accident occurred October 24, 2017 in Tracy, San Joaquin County, California -and- Accident occurred February 23, 2010 in Byron, Contra Costa County, California

The National Transportation Safety Board did not travel to the scene of this accident.

Additional Participating Entity:

Federal Aviation Administration / Flight Standards District Office; Oakland, California

Aviation Accident Factual Report - National Transportation Safety Board: https://app.ntsb.gov/pdf


Investigation Docket - National Transportation Safety Board: https://dms.ntsb.gov/pubdms

http://registry.faa.gov/N8494K

Location: Tracy, CA
Accident Number: WPR18LA015
Date & Time: 10/24/2017, 1000 PDT
Registration: N8494K
Aircraft: SCHWEIZER AIRCRAFT CORP G 164B
Aircraft Damage:  Substantial
Defining Event: Loss of control on ground
Injuries: 1 None
Flight Conducted Under: Part 91: General Aviation - Personal 

On October 24, 2017, about 1000 Pacific daylight time, a Schweizer Corp G-164B airplane, N8494K, was substantially damaged during the landing roll at a private airstrip near Tracy, California. The commercial pilot was not injured. The airplane was registered to and operated by Haley Flying Service of Tracy as a Title 14 Code of Federal Regulations Part 91 familiarization flight. Visual meteorological conditions prevailed at the time of the accident and no flight plan was filed. The local flight departed the private airstrip about 0900.

In a written statement submitted to the National Transportation Safety Board investigator-in-charge, the pilot reported that upon returning to the airport he flew around to the east end of the runway, got the [air]plane slowed down, trimmed for landing and made his approach. The pilot stated that after he had cleared the wires and made the runway, he pulled the power back to idle and glided down the runway, flared and made a smooth landing. The pilot opined that after landing he thought that he had hit a bump, which caused the airplane to bounce, followed by the airplane veering to the left. The pilot added that he tried to use right brake to bring the [air]plane back [to the right], but it felt as though the right brake was [not] effective. The airplane subsequently went off the left side of the runway and into a ditch, which resulted in a sudden engine stoppage, the separation of the right main landing gear, and damage to the lower right wing panel. The pilot reported no mechanical anomalies with the airplane that would have precluded normal operation. 

Pilot Information

Certificate: Commercial
Age: 29, Male
Airplane Rating(s): Single-engine Land
Seat Occupied: Single
Other Aircraft Rating(s): None
Restraint Used: 3-point
Instrument Rating(s): None
Second Pilot Present: No
Instructor Rating(s):None
Toxicology Performed: No
Medical Certification: Class 2 Without Waivers/Limitations
Last FAA Medical Exam: 10/04/2017
Occupational Pilot: Yes
Last Flight Review or Equivalent: 04/20/2016
Flight Time: 547 hours (Total, all aircraft), 110 hours (Total, this make and model), 449 hours (Pilot In Command, all aircraft), 19 hours (Last 90 days, all aircraft), 3 hours (Last 30 days, all aircraft), 1 hours (Last 24 hours, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Make: SCHWEIZER AIRCRAFT CORP
Registration: N8494K
Model/Series: G 164B B
Aircraft Category: Airplane
Year of Manufacture: 1983
Amateur Built: No
Airworthiness Certificate: Restricted
Serial Number: 713B
Landing Gear Type: Tailwheel
Seats: 1
Date/Type of Last Inspection: 08/17/2017, 100 Hour
Certified Max Gross Wt.: 6162 lbs
Time Since Last Inspection: 1 Hours
Engines: 1 Reciprocating
Airframe Total Time: 11561 Hours at time of accident
Engine Manufacturer: Pratt & Whitney
ELT: Not installed
Engine Model/Series: R-1340
Registered Owner: HALEY FLYING SERVICE INC
Rated Power: 600 hp
Operator: On file
Operating Certificate(s) Held: Agricultural Aircraft (137)

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual Conditions
Condition of Light: Day
Observation Facility, Elevation: SCK, 33 ft msl
Distance from Accident Site: 12 Nautical Miles
Observation Time: 0955 PDT
Direction from Accident Site: 50°
Lowest Cloud Condition: Clear
Visibility:  10 Miles
Lowest Ceiling: None
Visibility (RVR):
Wind Speed/Gusts: Calm /
Turbulence Type Forecast/Actual: / None
Wind Direction:
Turbulence Severity Forecast/Actual: /
Altimeter Setting: 30.19 inches Hg
Temperature/Dew Point: 19°C / 13°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Tracy, CA (NA)
Type of Flight Plan Filed: None
Destination: Tracy, CA (NA)
Type of Clearance: None
Departure Time: 0900 PDT
Type of Airspace: Class G

Airport Information

Airport: Delta Strip (NA)
Runway Surface Type: Asphalt
Airport Elevation: 25 ft
Runway Surface Condition: Dry
Runway Used: 26
IFR Approach: None
Runway Length/Width: 2700 ft / 60 ft
VFR Approach/Landing: Straight-in

Wreckage and Impact Information

Crew Injuries: 1 None
Aircraft Damage: Substantial
Passenger Injuries: N/A
Aircraft Fire: None
Ground Injuries: N/A
Aircraft Explosion: None
Total Injuries: 1 None

Latitude, Longitude:  37.816667, -121.456389

NTSB Identification: WPR18LA015
14 CFR Part 91: General Aviation
Accident occurred Tuesday, October 24, 2017 in Tracy, CA
Aircraft: SCHWEIZER AIRCRAFT CORP G 164B, registration: N8494K
Injuries: 1 Uninjured.

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 may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

On October 24, 2017, about 1000 Pacific daylight time, a Schweizer Aircraft Corp G-164B, N8494K,was substantially damaged due to impact with terrain during the landing roll at a private airstrip near Tracy, California. The airplane was owned and operated by Haley Flying Service of Tracy. The commercial pilot, the sole occupant, was not injured. The familiarization flight was being operated in accordance with 14 Code of Federal Regulations Part 91, and a flight plan was not filed. Visual meteorological conditions prevailed at the time of the accident. The flight departed the private airstrip about 0900.

In a telephone interview with the National Transportation Safety Board (NTSB) investigator-in-charge shortly after the accident, the pilot said this was his first flight in the make and model of the accident airplane. The pilot stated that after making a smooth touchdown, during which he thought he had hit a bump on the runway, the airplane veered to the left. The pilot opined that he attempted to correct back to the right by using right rudder and then right brake, each of which was ineffective in stopping the airplane from veering further to the left. The airplane subsequently exited the left side of the runway and collided with a ditch, which resulted in the airplane spinning around to the left. A postaccident examination of the airplane revealed that both the upper and lower right wing panels had sustained substantial damage, and that the right main landing gear had collapsed. The pilot stated that while trying to correct back to the right, the right brake seemed "mushy". The airplane has been recovered and secured for further examination.

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

Investigation Docket - National Transportation Safety Board:  https://dms.ntsb.gov/pubdms

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

NTSB Identification: WPR10LA125
14 CFR Part 137: Agricultural
Accident occurred Tuesday, February 23, 2010 in Byron, CA
Probable Cause Approval Date: 07/18/2011
Aircraft: Schweizer Aircraft Corp G164B, registration: N8494K
Injuries: 1 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

After an aerial application flight, the pilot initiated a turn back toward the airstrip. The airplane's engine started to run rough and lose power. The pilot turned the airplane into the wind and initiated a forced landing into a deeply furrowed field. As the airplane touched down the landing gear sunk into the soft ground and the airplane nosed over, coming to a rest inverted. Postaccident examination of the airframe and an engine test run revealed no anomalies. The nearest weather reporting station reported a temperature of 9 degrees Celsius (C) and a dew point of 7 degrees C at the time of the accident. Review of the carburetor icing probability chart revealed that this temperature and dew point were conducive to serious icing at cruise power.

The National Transportation Safety Board determines the probable cause(s) of this accident as follows:
A loss of engine power due to carburetor icing as a result of the pilot's failure to use carburetor heat.

On February 23, 2010, about 1330 Pacific standard time, a Schweizer Aircraft Corporation G-164B, N8494K, experienced a loss of engine power near Byron, California. Haley Flying Service, Inc., operated the airplane under the provisions of 14 Code of Federal Regulations Part 137 as an agricultural crop dusting operation. The airplane sustained substantial damage after making a forced landing on a soft dirt field and nosing over onto its back. The commercial pilot, the sole occupant, was not injured. Visual meteorological conditions were prevalent in the area, and no flight plan had been filed.

The pilot reported that after finishing the application flight he initiated a turn towards the airstrip when the engine started to run rough and lose significant power. The pilot turned the airplane into the wind and initiated a forced landing into a deeply furrowed field. As the airplane touched down, the landing gear sunk into the soft ground and the airplane nosed over, coming to rest inverted. 

Postaccident examination of the airframe and engine revealed substantial damage to three of the four airplane’s wings, along with the vertical stabilizer and rudder. No visual anomalies were observed with the engine. The spark plugs were removed and appeared normal. The fuel system was examined and found to be clear of water and debris. The engine was started and no anomalies were noted. 

The nearest weather reporting station was located at Livermore Municipal Airport, Livermore, California, about 12 nautical miles southwest of the accident site. At 1253 it reported, overcast skies at 400 feet; light rain showers; temperature 9 degrees Celsius (C); dew point 7 degrees C; and an altimeter setting of 30.19 inches of mercury. 

Review of the carburetor icing probability chart revealed that the temperature and dew point at the time of the accident were conducive to serious icing at cruise power.

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