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ASN Wikibase Occurrence # 147261
Last updated: 17 November 2021
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Date:31-JUL-2012
Time:09:20
Type:Silhouette image of generic FH11 model; specific model in this crash may look slightly different
Fairchild Hiller FH-1100
Owner/operator:Eclipse Helicopter Services
Registration: N5038F
MSN: 186
Fatalities:Fatalities: 0 / Occupants: 4
Aircraft damage: Substantial
Category:Accident
Location:Near Cody, Wyoming -   United States of America
Phase: Landing
Nature:Private
Departure airport:Cody, WY
Destination airport:Cody, WY
Investigating agency: NTSB
Narrative:
The pilot reported that while in cruise flight, the rear of the helicopter suddenly began to vibrate. He performed an autorotation to a field, and the helicopter landed hard. The tailboom and main transmission mounts were substantially damaged. The pilot reported that a tail rotor driveshaft coupling had split in half, which resulted in a loss of tail rotor drive. Postaccident examination of the tail rotor driveshaft coupling revealed that the coupling failure was initiated by fatigue cracking. A complete history of the part was not available; therefore, the total time in service of the part could not be determined.

Probable Cause: The failure of a tail rotor driveshaft coupling due to fatigue.

Sources:

NTSB

Accident investigation:
cover
  
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year and 8 months
Download report: Final report
Location


Revision history:

Date/timeContributorUpdates
31-Jul-2012 11:26 gerard57 Added
31-Jul-2012 13:41 Anon. Updated [Operator, Total occupants, Source, Damage]
01-Aug-2012 01:33 gerard57 Updated [Aircraft type, Registration, Narrative]
01-Aug-2012 01:50 gerard57 Updated [Aircraft type]
01-Aug-2012 08:17 Geno Updated [Time, Cn, Operator, Phase, Source, Narrative]
21-Dec-2016 19:28 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
27-Nov-2017 20:57 ASN Update Bot Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative]

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