Monday, July 24, 2017

de Havilland Canada DHC-2 Beaver, N364RA, Bay Air Inc: Accident occurred July 21, 2017 at Shannons Pond Seaplane Base (0Z3), Dillingham, Alaska

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

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

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


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


Bay Air Inc: http://registry.faa.gov/N364RA

Analysis 

The pilot stated that he was departing on a postmaintenance flight check in a float-equipped airplane from a short water lane at a remote, unimproved seaplane base. While taxiing for departure, he left the wing flaps in the "up" position to aid in turning the airplane on the water. After aligning the airplane for the takeoff run, he applied full power, and the airplane accelerated onto the step. While attempting to rotate, he realized that he had forgotten to reset the wing flaps to the "takeoff" position. He attempted to reset the manually operated, hydraulically actuated wing flaps, but the incorrect flap setting led to a longer-than-normal takeoff run, and the airplane subsequently impacted the water lane's far bank, which resulted in substantial damage to the left wing and left-wing strut. The pilot reported that there were no preaccident mechanical anomalies 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 set the wing flaps to the "takeoff" position, which resulted in a longer-than-normal takeoff run and collision with terrain.

Findings

Aircraft
LE flap control system - Incorrect use/operation (Cause)

Personnel issues
Use of equip/system - Pilot (Cause)

Environmental issues
Terrain - Effect on operation (Cause)

Factual Information

History of Flight

Takeoff
Collision during takeoff/land (Defining event)

Collision with terr/obj (non-CFIT)

Location: Dillingham, AK
Accident Number: ANC17CA038
Date & Time: 07/21/2017, 1200 AKD
Registration: N364RA
Aircraft: DEHAVILLAND DHC 2
Aircraft Damage: Substantial
Defining Event: Miscellaneous/other
Injuries: 3 None
Flight Conducted Under: Part 91: General Aviation - Personal

The pilot stated that he was departing on a post-maintenance flight check in a float-equipped airplane from a short waterlane, at a remote unimproved seaplane base. While taxiing for departure, he left the wing flaps in the up position to aid in turning the airplane on the water. After aligning the airplane for the takeoff run, he applied full power and the airplane accelerated onto the step. While attempting to rotate, he realized that he had forgot to reset the wing flaps to the takeoff position. He attempted to reset the manually operated hydraulically actuated wing flaps, but the airplane impacted the waterlane's far bank sustaining substantial damage to the left wing, and left-wing strut. The pilot stated that there were no preaccident mechanical anomalies that would have precluded normal operation.

In the recommendation section of the NTSB Accident/Incident Reporting Form 6120.1, the pilot stated that the accident may have been prevented if he would have utilized the airplane's checklist or rechecked the position of the wing flaps. 

Pilot Information

Certificate: Airline Transport
Age: 58, 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 Multi-engine; Airplane Single-engine
Toxicology Performed: No
Medical Certification: Class 2 Without Waivers/Limitations
Last FAA Medical Exam: 05/08/2017
Occupational Pilot: Yes
Last Flight Review or Equivalent: 10/13/2016
Flight Time: 23732 hours (Total, all aircraft), 6972 hours (Total, this make and model), 23601 hours (Pilot In Command, all aircraft), 110 hours (Last 90 days, all aircraft), 110 hours (Last 30 days, all aircraft), 1 hours (Last 24 hours, all aircraft) 

Aircraft and Owner/Operator Information

Aircraft Manufacturer: DEHAVILLAND
Registration: N364RA
Model/Series: DHC 2 MARK I
Aircraft Category: Airplane
Year of Manufacture: 1951
Amateur Built: No
Airworthiness Certificate: Normal
Serial Number: 364 
Landing Gear Type: Float
Seats: 7
Date/Type of Last Inspection: 07/13/2017, 100 Hour
Certified Max Gross Wt.:
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time: 15677 Hours as of last inspection
Engine Manufacturer: P&W
ELT: C126 installed, activated, did not aid in locating accident
Engine Model/Series: R-985 SERIES
Registered Owner: BAY AIR INC
Rated Power: 450 hp
Operator: BAY AIR INC
Operating Certificate(s) Held: On-demand Air Taxi (135) 

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual Conditions
Condition of Light: Day
Observation Facility, Elevation: PADL
Observation Time: 1956 UTC
Distance from Accident Site: 3 Nautical Miles
Direction from Accident Site: 240°
Lowest Cloud Condition: Clear
Temperature/Dew Point: 18°C / 11°C
Lowest Ceiling: None
Visibility:  10 Miles
Wind Speed/Gusts, Direction: 5 knots, 180°
Visibility (RVR):
Altimeter Setting: 29.97 inches Hg
Visibility (RVV): 
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Dillingham, AK (OZ3)
Type of Flight Plan Filed: None
Destination: Dillingham, AK (OZ3)
Type of Clearance: None
Departure Time: 1200 AKD
Type of Airspace: Class G 

Airport Information

Airport: Shannon Pond (OZ3)
Runway Surface Type: Water
Airport Elevation: 80 ft
Runway Surface Condition: Water--calm
Runway Used: N/A
IFR Approach: None
Runway Length/Width:
VFR Approach/Landing: None 

Wreckage and Impact Information

Crew Injuries: 1 None
Aircraft Damage: Substantial
Passenger Injuries: 2 None
Aircraft Fire: None
Ground Injuries: N/A
Aircraft Explosion: None
Total Injuries: 3 None
Latitude, Longitude: 59.199444, -158.741944 (est)

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