ASN Wikibase Occurrence # 36015
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Date: | Saturday 25 September 1999 |
Time: | 06:42 LT |
Type: | Kaman HH-43F |
Owner/operator: | Moseley Aviation, Inc. |
Registration: | N100PL |
MSN: | 59-1583 |
Year of manufacture: | 1961 |
Total airframe hrs: | 5139 hours |
Engine model: | Lycoming T53-L-13B |
Fatalities: | Fatalities: 2 / Occupants: 2 |
Aircraft damage: | Destroyed |
Category: | Accident |
Location: | Phoenix, AZ -
United States of America
|
Phase: | En route |
Nature: | Ferry/positioning |
Departure airport: | Litchfield Park, AZ |
Destination airport: | (NONE) |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
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.
Probable 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.
Accident investigation:
|
| |
Investigating agency: | NTSB |
Report number: | LAX99FA317 |
Status: | Investigation completed |
Duration: | 1 year and 7 months |
Download report: | Final report |
|
Sources:
NTSB LAX99FA317
History of this aircraft
Other occurrences involving this aircraft Location
Revision history:
Date/time | Contributor | Updates |
24-Oct-2008 10:30 |
ASN archive |
Added |
21-Dec-2016 19:22 |
ASN Update Bot |
Updated [Time, Damage, Category, Investigating agency] |
14-Dec-2017 09:03 |
ASN Update Bot |
Updated [Operator, Departure airport, Destination airport, Source, Narrative] |
07-Apr-2024 17:45 |
ASN Update Bot |
Updated [Time, Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
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