# Accident 19910404009099A: Cessna 172N, Stockton, CA, April 4, 1991

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: April 4, 1991, 19:40 local time
- Place: Stockton, CA
- Damage: Substantial damage
- Phase of flight: Fcd/Prec Ldg From Cruise
- Operating rules: General operating rules (Part 91)
- Location: 37.9577° N, 121.2908° W: Placed by OpenAirDocs: center of Stockton, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.9577&lon=-121.2908&mi=10
- Aircraft: N733MQ, a cancelled registration (https://openairdocs.org/deregistered/N733MQ-2013-05-07) (OpenAirDocs)
- Registry model: Cessna 172N (registry code 2072434, https://openairdocs.org/model/cessna-172n) (OpenAirDocs)
- Registry engine: Lycoming 0-320 series (registry code 41508, https://openairdocs.org/engine/lycoming-0-320-series) (OpenAirDocs)
- Reported make and model: CESSNA 172N
- Reported engine: LYC O320H2AD
- People aboard: 2
- Fatal injuries: 0
- Pilot flight hours: 7,000 total, 300 in this make and model, 400 in the last 90 days
- NTSB investigation: [NTSB LAX91LA157](https://openairdocs.org/ntsb/LAX91LA157) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19910404009099A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

ENGINE QUIT ON NIGHT TRAINING FLIGHT. NOSED OVER LANDING. DUAL SINGLE SHAFT MAG FELL OFF ENGINE, WRONG GASKET USED.

## The NTSB's investigation of this event (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB LAX91LA157](https://openairdocs.org/ntsb/LAX91LA157), Apr 5, 1991: Cessna 172N (N733MQ), Stockton, CA, substantial damage. Probable cause: THE INSTALLATION BY MAINTENANCE PERSONNEL OF AN INCORRECT GASKET THAT RESULTED IN THE LOSS OF THE ENGINE MAGNETO.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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