ASN Wikibase Occurrence # 289419
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| Date: | Tuesday 5 April 2011 |
| Time: | 16:00 LT |
| Type: |  Zenith STOL CH 701 |
| Owner/operator: | Richards David Stanley Iii |
| Registration: | N128CF |
| MSN: | 75203 |
| Engine model: | Hirth 3701 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | El Centro, California -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Private |
| Departure airport: | El Centro, CA |
| El Centro, CA | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that, during the initial climb after takeoff, the airplane sustained a partial loss of engine power and that he initiated a forced landing to a wet, muddy, wheat field. During the landing roll, the nosewheel of the airplane dug into the soft terrain and the airplane nosed over. A postaccident examination of the engine revealed that the No. 2 cylinder and piston exhibited signatures consistent with oil starvation. During disassembly of the engine oil pump system, the No. 1 shaft/bearing assembly for the oil pump system was intact and operational. The No. 2 drive coupling was found damaged, out of alignment, and not functioning. This condition would result in the oil supply system supplying oil at a sporadic rate, below minimal volume and pressure, which would result in oil starvation primarily to the No. 2 cylinder assembly.
Probable Cause: A partial loss of engine power during the initial climb after takeoff due to oil starvation because of the failure of the No. 2 oil pump drive coupling.
Accident investigation:
 |
|
Sources:
NTSB WPR11LA187
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 05-Oct-2022 13:36 | ASN Update Bot | Added |
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