# Accident 19910201003529A: Amtrnc 235LANCAIR, Auga Caliente, CA, February 1, 1991

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: February 1, 1991, 12:30 local time
- Place: Auga Caliente, CA
- Damage: Substantial damage
- Phase of flight: Fcd/Prec Ldg From Cruise
- Operating rules: General operating rules (Part 91)
- Location: 32.7897° N, 116.9595° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=32.7897&lon=-116.9595&mi=10
- Aircraft: N17S (not matched to a registry record)
- Reported make and model: AMTRNC 235LANCAIR
- Reported engine: LYC O320A1A
- Fatal injuries: 0
- Pilot flight hours: 4,500 total, 400 in this make and model
- NTSB investigation: [NTSB LAX91LA090](https://openairdocs.org/ntsb/LAX91LA090) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19910201003529A

## Narrative

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

LOUD BANG ON TAKEOFF. ENGINE OVERSPEED AND QUIT. BOTH WOOD PROP BLADES SEPARATED.HYDROLYSIS ACTION OF WOOD AND GLUE

## 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 LAX91LA090](https://openairdocs.org/ntsb/LAX91LA090), Feb 1, 1991: Riddell Lancair 235 (N17S), Agua Caliente, CA, substantial damage. Probable cause: THE FAILURE OF THE PROPELLER BLADES DUE TO A WEAKENING OF THE WOOD STRUCTURE DUE TO ACID HYDROLYSIS. A FACTOR IN THE ACCIDENT WAS THE INADEQUATE MAINTENANCE OF THE PROPELLER ASSEMBLY BY ALLOWING…

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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