ASN Wikibase Occurrence # 374677
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| Date: | Tuesday 8 July 1986 |
| Time: | 09:15 LT |
| Type: |  Bell 47G-5 |
| Owner/operator: | M&w Flying Service, Inc. |
| Registration: | N1316X |
| MSN: | 7827 |
| Total airframe hrs: | 5951 hours |
| Engine model: | LYCOMING VO-435-B1A |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Porterville, CA -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Agricultural |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
DURING AN AERIAL APPLICATION FLIGHT THE PLT LOST CONTROL OF THE HELICOPTER AND COLLIDED WITH A BUILDING. EXAMINATION REVEALED THAT THE INSIDE DIAMETER OF THE TAIL ROTOR DRIVESHAFT WAS NOT COATED WITH ALUMINIZED LACQUER AS REQUIRED BY THE BELL FINISH PROCESS SPECIFICATION. THE BELL DRAWING REQUIRES TWO #2 SHORT PLUGS TO BE INSTALLED AT A SPECIFIED DISTANCE FROM EACH END OF THE TAIL ROTOR DRIVESHAFT AND THE END OF THE SHAFT TO BE SEALED OFF WITH ADHESIVE TO PROTECT THE SHAFT INSIDE DIAMETER FROM CORROSION. A DIMENSIONAL CHECK OF THE SHAFT REVEALED THAT THE PLUGS WERE NOT INSTALLED AT THE CORRECT DISTANCE FROM THE END OF THE SHAFT AS SPECIFIED IN THE DRAWING.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB LAX86FVA11
History of this aircraft
Other occurrences involving this aircraft
| 20 May 1985 | N1316X | M&w Flying Service, Inc. | 0 | Lindsay, CA | |
sub |
| 5 June 1988 | N1316X | Sinton, Jack | 0 | Oceano, CA | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 28-Mar-2024 11:45 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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