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ASN Wikibase Occurrence # 147493
Last updated: 15 November 2021
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Type:Silhouette image of generic MD60 model; specific model in this crash may look slightly different
McDonnell Douglas MD600N
Owner/operator:Aurora Aviation Services Inc.
Registration: N737TV
MSN: RN017
Fatalities:Fatalities: 1 / Occupants: 1
Aircraft damage: Substantial
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)
Destination airport:Delta Junction, AK (76AK)
Investigating agency: NTSB
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 pilotís 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:
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year
Download report: Final report

Revision history:

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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