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ASN Wikibase Occurrence # 145876
Last updated: 16 September 2021
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Type:Silhouette image of generic B06 model; specific model in this crash may look slightly different
Bell 206L-4 LongRanger IV
Owner/operator:PHI Inc
Registration: N7077F
MSN: 52038
Fatalities:Fatalities: 1 / Occupants: 1
Aircraft damage: Substantial
Location:South Timbalier (ST67B) Offshore Installation, Gulf of Mexico -   United States of America
Phase: Landing
Departure airport:
Destination airport:Gulf of Mexico,
Investigating agency: NTSB
The commercial pilot was attempting to land his single-engine helicopter on a fixed production platform helipad when the main rotor blades struck the corner of an oil derrick that was partially positioned over the helipad. The pilot lost control and descended inverted into the ocean. The emergency external floats were not inflated, and the helicopter sank. At the time of the accident, a mobile jack-up rig was mated with the fixed production platform. According to the company that owned the production platform, the helipad was closed and all flight operations were being conducted from the jack-up rigís helipad, which was larger and unobstructed. However, at the time of the accident, the production platformís helipad was not marked closed and no notice to airman (NOTAM) had been issued to notify pilots that the helipad was closed.

There was also nothing in the operatorís flight operations manual that would have restricted the pilot from landing under an obstruction. Other company pilots were aware that this helipad was a flight hazard due to the encroachment of the oil derrick, but it was never reported to management or via the companyís internal safety notification system. A review of company flight manifest records revealed that the pilot had flown to this platform on several occasions, including 2 days before the accident, and landed on the jack-up rigís helipad. It could not be determined why the pilot decided to land on the smaller and obstructed helipad rather than the jack up rigís larger helipad just 2 days later. Examination of the helicopter and engine revealed no preimpact mechanical failures or malfunctions that would have precluded normal operation.
Probable Cause: The pilotís failure to maintain clearance from an obstacle while landing on an obstructed helipad, which resulted in a collision and loss of control. Contributing to the accident was the failure of the helipad owner to mark the helipad closed and the failure of the flight operator to report the known hazard and issue a notice to airman.



Accident investigation:
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year
Download report: Final report

Revision history:

29-May-2012 01:18 gerard57 Added
29-May-2012 02:32 RobertMB Updated [Time, Aircraft type, Source, Narrative]
29-May-2012 10:34 Geno Updated [Aircraft type, Registration, Cn, Source]
08-Jun-2012 18:04 Geno Updated [Time, Location, Phase, Nature, Departure airport, Destination airport, Source, Narrative]
21-Aug-2016 20:57 Dr.John Smith Updated [Time, Operator, Source, Narrative]
29-Sep-2016 17:32 Aerossurance Updated [Time, Location, Departure airport, Destination airport, Source, Narrative]
21-Dec-2016 19:28 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
27-Nov-2017 20:41 ASN Update Bot Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative]

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