Narrative:Wiggins Airways has a twice daily flight to the Nantucket Memorial Airport, MA (ACK) carrying UPS and Federal Express packages. It was carrying about 200 pounds of cargo for the morning flight out of Hyannis-Barnstable Airport, MA (HYA). The airplane taxied to runway 24 for departure. According to an eye witness the pilot made a rolling takeoff. The airplane banked left immediately after takeoff. It then struck terrain in a steep bank.
Investigation results indicate that the upper flight control lock was still attached to the column by its removable pin. The pin attaching the upper control lock to the control column remained tethered to upper flight control lock by a steel cable. However, the pins from the two other flight control lock cables were missing, and the cables exhibited pin retaining end failures consistent with overstress.
Probable Cause:
PROBABLE CAUSE: "The pilot's failure to remove the flight control lock prior to takeoff. Contributing to the accident was the Federal Aviation Administration's failure to issue an airworthiness directive making the manufacturer's previously-issued flight control lock service bulletins mandatory."
Accident investigation:
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Investigating agency: | NTSB |
Status: | Investigation completed |
Duration: | 1 years | Accident number: | NYC08FA218 | Download report: | Summary report
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Classification:
Locked rudders/ailerons/gustlock
Loss of control
Sources:
» Pilot killed in Hyannis air crash identified (Cape Cod Times, 18-6-2008)
» NTSB
Follow-up / safety actions
FAA issued 1 Airworthiness Directive
Issued: -JUN-2008 | To: | AD 2008-CE-046-AD |
AD requires compliance with service bulletin 6/508 within 6 months of December 30, 2008. |
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Photos
accident date:
18-06-2008type: de Havilland Canada DHC-6 Twin Otter 100
registration: N656WA
accident date:
18-06-2008type: de Havilland Canada DHC-6 Twin Otter 100
registration: N656WA
accident date:
18-06-2008type: de Havilland Canada DHC-6 Twin Otter 100
registration: N56AN
Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does
not display the exact flight path.
Distance from Hyannis-Barnstable Airport, MA to Nantucket Memorial Airport, MA as the crow flies is 49 km (31 miles).
Accident location: Approximate; accuracy within a few kilometers.
This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.