ASN Wikibase Occurrence # 352870
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| Date: | Sunday 8 August 1999 |
| Time: | 07:45 LT |
| Type: |  Weatherly 201B |
| Owner/operator: | Private |
| Registration: | N197SK |
| MSN: | 1645 |
| Total airframe hrs: | 847 hours |
| Engine model: | P&W R-985 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Oberlin, KS -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Agricultural |
| Departure airport: | , KS |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The airplane impacted a muddy field following a loss of engine power during an aerial application. The Bendix NA-R9B carburetor fulcrum screw and the carburetor float pivot pin exhibited chatter marks. The fulcrum screw was removed after turning it 1/2 of a turn. The fulcrum screw safety wire was broken. The NA-R9B float carburetor technical overhaul manual states that the fulcrum screw is to be torqued to a value of 100-120 in-lbs.
Probable Cause: Engine failure due to an undertorqued carburetor fulcrum screw. Contributing factors were the muddy terrain and the low altitude of the aerial operation.
Accident investigation:
 |
|
Sources:
NTSB CHI99LA297
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 09-Mar-2024 07:51 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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