ASN Wikibase Occurrence # 223644
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| Date: | Sunday 31 March 2019 |
| Time: | 15:30 LT |
| Type: |  Cessna 172L Skyhawk |
| Owner/operator: | Placerville Aviation |
| Registration: | N7033Q |
| MSN: | 17260333 |
| Year of manufacture: | 1971 |
| Total airframe hrs: | 5851 hours |
| Engine model: | Lycoming O-320-E2D |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Placerville Airport (KPVF), Placerville, CA -
 United States of America
|
| Phase: | Take off |
| Nature: | Private |
| Departure airport: | Placerville, CA |
| Placerville Airport, CA (PVF/KPVF) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
During the climb after takeoff the engine lost partial power. The pilot performed troubleshooting steps and initiated a return to the airport. The airplane was not able to maintain altitude and landed in trees about 300 ft short of the approach end of the runway.
Postaccident examination revealed sooting signatures on the spark plug electrodes and inner surfaces of the exhaust pipe, indicating an excessively rich fuel-to-air mixture. Examination of the carburetor revealed multiple maintenance-related discrepancies, including an incorrectly adjusted float and a loose carburetor bowl. The discrepancies likely resulted in mixture irregularities and a loss of engine power.
Maintenance instructions and a series of service bulletins had been published by the carburetor manufacturer to address these issues. The discrepancies appeared to have been present for a while and were likely present at the time of the last annual inspection. The carburetor had not been overhauled or serviced in at least 19 years even though the manufacturer recommended overhaul at 10-year intervals.
Probable Cause: The partial loss of engine power due to an improperly maintained carburetor.
Accident investigation:
 |
|
Sources:
NTSB WPR19LA102
FAA register: https://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=N7033Q
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 01-Apr-2019 00:54 | Geno | Added |
| 01-Apr-2019 05:12 | RobertMB | Updated [Aircraft type, Source, Narrative] |
| 01-Apr-2019 20:59 | Geno | Updated [Aircraft type, Registration, Cn, Operator, Phase, Nature, Departure airport, Source, Damage, Narrative] |
| 01-Apr-2019 21:53 | RobertMB | Updated [Total occupants] |
| 02-Jul-2022 09:20 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
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