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Date:Wednesday 18 June 2008
Type:Silhouette image of generic DHC6 model; specific model in this crash may look slightly different
de Havilland Canada DHC-6 Twin Otter 100
Operator:Wiggins Airways
Registration: N656WA
MSN: 47
First flight: 1967
Total airframe hrs:38185
Engines: 2 Pratt & Whitney Canada PT6A-20
Crew:Fatalities: 1 / Occupants: 1
Passengers:Fatalities: 0 / Occupants: 0
Total:Fatalities: 1 / Occupants: 1
Aircraft damage: Destroyed
Aircraft fate: Written off (damaged beyond repair)
Location:Hyannis-Barnstable Airport, MA (HYA) (   United States of America)
Crash site elevation: 17 m (56 feet) amsl
Phase: Takeoff (TOF)
Departure airport:Hyannis-Barnstable Airport, MA (HYA/KHYA), United States of America
Destination airport:Nantucket Memorial Airport, MA (ACK/KACK), United States of America
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:
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 years
Accident number: NYC08FA218
Download report: Summary report
Language: English

Locked rudders/ailerons/gustlock
Loss of control

» Pilot killed in Hyannis air crash identified (Cape Cod Times, 18-6-2008)

Follow-up / safety actions

FAA issued 1 Airworthiness Directive

Show all...


photo of DHC-6-Twin-Otter-100-N656WA
accident date: 18-06-2008
type: de Havilland Canada DHC-6 Twin Otter 100
registration: N656WA
photo of DHC-6-Twin-Otter-100-N656WA
accident date: 18-06-2008
type: de Havilland Canada DHC-6 Twin Otter 100
registration: N656WA
photo of DHC-6-Twin-Otter-100-N56AN
accident date: 18-06-2008
type: de Havilland Canada DHC-6 Twin Otter 100
registration: N56AN

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.
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DHC-6 Twin Otter

  • 982+ built
  • 253rd loss
  • 165th fatal accident
  • 141st worst accident (at the time)
  • 158th worst accident (currently)
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