Thursday, September 7, 2017

Cessna U206G Stationair, N734GW, 40 Mile Air Ltd - RWR Air Inc: Accident occurred September 05, 2017 in Chicken, Alaska

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Fairbanks, Alaska

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

RWR Air Inc: http://registry.faa.gov/N734GW

Location: Chicken, AK
Accident Number: GAA17CA549
Date & Time: 09/05/2017, 1500 AKD
Registration: N734GW
Aircraft: CESSNA U206
Aircraft Damage: Substantial
Defining Event: Dragged wing/rotor/float/other
Injuries: 1 None
Flight Conducted Under: Part 135: Air Taxi & Commuter - Non-scheduled

Analysis

The pilot reported that, while taking off from a road, the airplane struck a road sign with its left wing. He explained that, during takeoff, the airplane had accelerated rapidly and that, in the next moment, he felt a lurch to the left. The parking brake, which he had forgotten to release, then released. He added that he had "incorrectly assumed" that the brake had grabbed and caused the lurch, not the unknown to him, sign strike. Subsequently, he corrected with rudder and continued the flight.

He added that the airplane flew "normally" but that it had a "slightly left-wing heavy feel." He continued the flight without further incident.

Postaccident examination of the airplane revealed that it had sustained substantial damage to the left wing.

The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. 

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
The pilot's failure to maintain clearance from a sign while taking off from a road.

Findings

Personnel issues
Monitoring environment - Pilot (Cause)

Environmental issues
Sign/marker - Effect on operation (Cause)

Factual Information

History of Flight

Takeoff
Collision with terr/obj (non-CFIT)
Dragged wing/rotor/float/other (Defining event) 

Pilot Information

Certificate: Flight Instructor; Commercial
Age: 59, Male
Airplane Rating(s): Multi-engine Land; Single-engine Land; Single-engine Sea
Seat Occupied: Left
Other Aircraft Rating(s): None
Restraint Used: 3-point
Instrument Rating(s): Airplane
Second Pilot Present: No
Instructor Rating(s): Airplane Single-engine; Instrument Airplane
Toxicology Performed: No
Medical Certification: Class 2 With Waivers/Limitations
Last FAA Medical Exam: 09/01/2017
Occupational Pilot: Yes
Last Flight Review or Equivalent: 06/01/2017
Flight Time:  (Estimated) 7500 hours (Total, all aircraft), 5500 hours (Total, this make and model), 7000 hours (Pilot In Command, all aircraft), 360 hours (Last 90 days, all aircraft), 120 hours (Last 30 days, all aircraft), 7 hours (Last 24 hours, all aircraft) 

Aircraft and Owner/Operator Information

Aircraft Manufacturer: CESSNA
Registration: N734GW
Model/Series: U206 G
Aircraft Category: Airplane
Year of Manufacture: 1978
Amateur Built: No
Airworthiness Certificate: Restricted
Serial Number: U20604832
Landing Gear Type: Tricycle
Seats: 2
Date/Type of Last Inspection:  Unknown
Certified Max Gross Wt.: 3600 lbs
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time:
Engine Manufacturer: Continental
ELT: Installed, not activated
Engine Model/Series: IO-550
Registered Owner: On file
Rated Power: 300 hp
Operator: On file
Operating Certificate(s) Held:  Commuter Air Carrier (135); On-demand Air Taxi (135) 

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual Conditions
Condition of Light: Day
Observation Facility, Elevation: PAEG, 908 ft msl
Observation Time: 2253 UTC
Distance from Accident Site: 29 Nautical Miles
Direction from Accident Site: 14°
Lowest Cloud Condition:
Temperature/Dew Point: 14°C / 11°C
Lowest Ceiling: Overcast / 4600 ft agl
Visibility:  10 Miles
Wind Speed/Gusts, Direction: Calm
Visibility (RVR):
Altimeter Setting: 29.85 inches Hg
Visibility (RVV):
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Chicken, AK
Type of Flight Plan Filed: VFR
Destination: TOK, AK (6K8)
Type of Clearance: None
Departure Time: 1500 AKD
Type of Airspace: Class G 

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:  64.318056, -141.419722 (est)

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