ASN Wikibase Occurrence # 374182
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Date: | Thursday 18 September 1986 |
Time: | 05:30 LT |
Type: | Hiller UH-12E |
Owner/operator: | West Farm Air |
Registration: | N688SB |
MSN: | 1825 |
Engine model: | LYCOMING VO-540-C2A |
Fatalities: | Fatalities: 0 / Occupants: 1 |
Aircraft damage: | Substantial |
Category: | Accident |
Location: | Lemoore, CA -
United States of America
|
Phase: | En route |
Nature: | Agricultural |
Departure airport: | |
Destination airport: | |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:THE PLT REPTD THAT WHILE RETURNING TO THE LOADING AREA AFTER SPRAYING A FIELD, HE HEARD A LOUD POP EMANATING FROM THE ENGINE COMPARTMENT. SHORTLY THEREAFTER HE OBSERVED A FIRE IN THE ENGINE COMPARTMENT AND LOST FORWARD AND AFT CONTROL OF THE HELICOPTER. THE PLT IMMEDIATELY EXECUTED AN AUTOROTATION. THE HELICOPTER ROLLED OVER ONTO ITS SIDE ON TOUCH DOWN. THE POST-ACCIDENT INVESTIGATION ENGINE EXAMINATION DISCLOSED THAT THE NUMBER 3 CONNECTING ROD BOLTS FAILED. FURTHER EXAMINATION REVEALED THAT THE REMAINING CON ROD BOLTS TORQUE VALUES WERE ABT 50% LESS THAN THE REQUIRED VALUES.
Probable Cause:
Accident investigation:
|
| |
Investigating agency: | NTSB |
Report number: | LAX86FVA14 |
Status: | Investigation completed |
Duration: | |
Download report: | Final report |
|
Sources:
NTSB LAX86FVA14
Location
Revision history:
Date/time | Contributor | Updates |
28-Mar-2024 06:49 |
ASN Update Bot |
Added |
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