# Accident 19910608020539A: Cessna 172N, Thermal, CA, June 8, 1991

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: June 8, 1991, 16:55 local time
- Place: Thermal, CA
- Airport: Thermal Airport
- Damage: Substantial damage
- Phase of flight: Final Approach
- Operating rules: General operating rules (Part 91)
- Location: 33.4793° N, 116.1007° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=33.4793&lon=-116.1007&mi=10
- Aircraft: N6230D, registered now (https://openairdocs.org/aircraft/N6230D) (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: 90 total, 8 in this make and model, 9 in the last 90 days
- NTSB investigation: [NTSB LAX91LA255](https://openairdocs.org/ntsb/LAX91LA255) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19910608020539A

## Narrative

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

ROUGH ENGINE AND LOSING POWER UNDERSHOT RUNWAY BY CHANGING RUNWAYS CLOSE IN. WORN VALVES. ENGINE 85HRS OVER TBO.

## 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 LAX91LA255](https://openairdocs.org/ntsb/LAX91LA255), Jun 8, 1991: Cessna 172N (N6230D), Thermal, CA, substantial damage. Probable cause: THE PARTIAL FAILURE OF THE ENGINE/POWERPLANT FROM A WORN INTAKE VALVE AND THE FAILURE OF COMPANY/OPERATOR MANAGEMENT TO PERFORM AN OVERHAUL ON THE ENGINE WITHIN THE TIME FRAME RECOMMENDED BY THE…

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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