ASN Wikibase Occurrence # 36015
Last updated: 1 August 2014
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Date:25-SEP-1999
Time:0642
Type:Kaman HH-43F
Owner/operator:Moseley Aviation
Registration: N100PL
C/n / msn: 59-1583
Fatalities:Fatalities: 2 / Occupants: 2
Other fatalities:0
Airplane damage: Written off (damaged beyond repair)
Location:Phoenix, AZ -   United States of America
Phase: En route
Nature:Ferry/positioning
Departure airport:Litchfield Park, AZ
Destination airport:, AZ (NONE)
Narrative:
Ground witnesses reported seeing the helicopter disintegrate in-flight, about 250 feet above ground level. The helicopter impacted the ground in a nearly inverted attitude, scattering rotor blade fragments on both sides of a canal. The ex-military, medium lift helicopter with twin intermeshing rotors was en route to perform an off-airport lift operation. It operated in the 'restricted' category and was required to fly over unpopulated areas. At the time of the accident, it was flying parallel with a canal. Examination of the wreckage revealed that the fixed horizontal stabilizer left outboard leading edge attach fitting had fractured and exhibited evidence of a pre-existing crack. A second attach fitting aft of the leading edge attachment was also fractured. Additionally, the operator had installed automotive dampers in lead-lag positions on the rotor blades. CAUSE: Failure of the horizontal stabilizer left outboard forward attach point because of a previously existing crack that resulted from inadequate maintenance inspection by the operator. A factor was the use of automotive parts.

Sources:
NTSB: http://www.ntsb.gov/ntsb/brief.asp?ev_id=20001212X19794


Revision history:

Date/timeContributorUpdates
24-Oct-2008 10:30 ASN archive Added
Number of views: 801

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