ASN Wikibase Occurrence # 287217
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| Date: | Friday 9 January 2009 |
| Time: | 22:10 LT |
| Type: |  Cessna R172K |
| Owner/operator: | Bronson Mark W |
| Registration: | N758FN |
| MSN: | R1723062 |
| Total airframe hrs: | 4916 hours |
| Engine model: | TCM IO-360-KB |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Fremont, California -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Private |
| Departure airport: | Palo Alto Airport, CA (PAO/KPAO) |
| Palo Alto Airport, CA (PAO/KPAO) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that after takeoff, and during a left turn, he heard a sudden change in the engine sound followed by a loss of power. He stated that he increased and decreased the throttle with little response from the engine and elected to make a precautionary landing onto a nearby levy. During the landing roll on the levy, the airplane veered to the right, exited the levy, and nosed over in a bog. Both wings sustained substantial damage. Examination of the engine revealed that the oil pump/tachometer drive gear separated from the base of its driveshaft. Metallurgical examination revealed that the oil pump drive gear failed at the intersection of the shaft and gear. Scanning electron microscope images of the fracture showed raised and flattened areas typical of contact damage during cyclic loading. The cause of the fracture was not determined.
Probable Cause: The partial loss of engine power during takeoff due to an oil pump/tachometer drive gear failure for undetermined reasons.
Accident investigation:
 |
|
Sources:
NTSB WPR09LA077
History of this aircraft
Other occurrences involving this aircraft
| 10 January 2009 | N758FN | private | 0 | Palo Alto, CA | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 04-Oct-2022 08:25 | ASN Update Bot | Added |
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