ASN Wikibase Occurrence # 140434
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| Date: | Tuesday 8 November 2011 |
| Time: | 11:00 |
| Type: |  Piper PA-31T Cheyenne II |
| Owner/operator: | Travelaire Service Inc |
| Registration: | N39EH |
| MSN: | 31T-7920020 |
| Total airframe hrs: | 6345 hours |
| Engine model: | P&W Canada PT6A-60A |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Cheyenne Regional/Jerry Olson Field (KCYS), WY -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Passenger - Non-Scheduled/charter/Air Taxi |
| Departure airport: | Cheyenne, WY (CYS) |
| Sheridan, WY (SHR) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The airplane was climbing through 7,500 feet when the main cabin door opened in-flight and subsequently separated from the airframe. The main cabin door was later recovered and examined. The examination revealed deformation on the outer skin on the lower end of the door; the skin deformation was consistent with the door rotating downward and aft relative to the hinge attachment. The fracture surfaces were on slant planes consistent with ductile overstress fracture. No evidence of preexisting cracks was observed. The door latching mechanism was examined and all pushrods, latch pins, and the associated bellcrank were in place and intact. Wear was observed on the upper side of the forward pins at the middle and upper positions; however, the latching mechanism travel and extension of the latch pins was correct. No other anomalies were noted; thus it is likely the door latch mechanism was not fully engaged before takeoff, which resulted in the door opening in-flight.
Probable Cause: The flight crew’s failure to properly latch the cabin door before takeoff.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=39EH&x=29&y=14
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-Dec-2011 22:41 | Geno | Added |
| 21-Dec-2016 19:26 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 07-Aug-2017 13:36 | TB | Updated [Aircraft type, Location, Source] |
| 27-Nov-2017 17:25 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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