ASN Wikibase Occurrence # 147493
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| Date: | Tuesday 7 August 2012 |
| Time: | 16:45 |
| Type: |  McDonnell Douglas MD 600N |
| Owner/operator: | Aurora Aviation Services Inc. |
| Registration: | N737TV |
| MSN: | RN017 |
| Year of manufacture: | 1997 |
| Total airframe hrs: | 9730 hours |
| Engine model: | Rolls Royce C-47 Series |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | ca 38 mi NE of Delta Junction, AK -
 United States of America
|
| Phase: | Standing |
| Nature: | Passenger - Non-Scheduled/charter/Air Taxi |
| Departure airport: | Delta Junction, AK (76AK) |
| Delta Junction, AK (76AK) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot was transporting personnel from a remote elevated helipad constructed of logs. Witnesses stated that the helicopter had just touched down, and the pilot turned his head to give the signal to board when the helicopter suddenly pitched up and back, striking trees at the edge of the helipad. The helicopter rolled down the hill. A postaccident examination of the helipad revealed that one of the logs that made up the rear portion of the helipad decking had been pulled from the structure and damaged.
Based on the lack of mechanical anomalies with the helicopter and the damage to the helipad decking, it is likely the pilot landed too far forward on the helipad, which allowed the tail of the left skid to fall into the open area between the logs and become entangled. It is likely that the pilot sensed the imbalance and applied collective pitch, which resulted in a dynamic rollover.
Probable Cause: The pilot’s failure to clear the left landing gear skid, which resulted in the entanglement of the left landing gear skid with a log, and his subsequent application of collective pitch, which resulted in a dynamic rollover.
Accident investigation:
 |
|
Sources:
NTSB
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 08-Aug-2012 01:05 | gerard57 | Added |
| 08-Aug-2012 06:49 | gerard57 | Updated [Aircraft type] |
| 08-Aug-2012 08:49 | Geno | Updated [Time, Registration, Cn, Operator, Location, Nature, Source, Narrative] |
| 23-Sep-2012 12:13 | richard | Updated [Location, Source, Narrative] |
| 27-Feb-2013 08:54 | TB | Updated [Time, Aircraft type, Operator, Location, Phase, Departure airport, Destination airport, Source, Narrative] |
| 30-Aug-2014 15:29 | Aerossurance | Updated [Phase, Nature, Narrative] |
| 21-Dec-2016 19:28 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 28-Nov-2017 13:19 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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