ASN Wikibase Occurrence # 295273
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| Date: | Saturday 6 September 2003 |
| Time: | 12:40 LT |
| Type: |  Cessna 172RG |
| Owner/operator: | Private |
| Registration: | N6368R |
| MSN: | 172RG0171 |
| Year of manufacture: | 1979 |
| Total airframe hrs: | 5300 hours |
| Engine model: | Lycoming O-360-F1A6 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Blanchard, Idaho -
 United States of America
|
| Phase: | Unknown |
| Nature: | Private |
| Departure airport: | Spokane-Felts Field, WA (SFF/KSFF) |
| Bonners Ferry, ID (65S) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that while climbing there was a loud bang and simultaneously a spray of oil across the front windscreen. Several seconds later smoke began to develop within the cockpit and the pilot secured the engine and executed an off airport landing. The aircraft encountered rough, deeply furrowed terrain on rollout during which the landing gear collapsed. Post crash examination of the aircraft's engine revealed that the three-quarter inch hex head plug at the front of the engine, which retains the propeller governor idler gear shaft, had backed out of its threaded insert. The plug, which was found in the bottom of the engine had no safety wire attached and no safety wire was observed on the tie down point on the engine. The propeller governor idler gear shaft setscrew was loose and the gear shaft itself was missing. With the hex head plug and propeller governor idler gear shaft released, engine oil, under pressure could exit the engine. The engine had been overhauled 248.2 hours prior to the accident and then subsequently repaired for a propeller strike. It could not be determined whether any action related to the safety wiring of the hex plug or any adjustment to the set screw had been conducted at the overhaul or prop strike repair.
Probable Cause: The loss of engine oil as a result of the inadequate installation of the idler gear shaft set screw and the lack of a safety wire on the hex head (oil) plug. A contributing factor was the rough and uneven terrain.
Accident investigation:
 |
|
Sources:
NTSB SEA03LA187
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 13-Oct-2022 06:34 | ASN Update Bot | Added |
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