# Accident 19911015046529A: Piper PA18150, Montague Island, AK, October 15, 1991

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: October 15, 1991, 16:55 local time
- Place: Montague Island, AK
- Damage: Substantial damage
- Phase of flight: Fcd/Prec Ldg From Cruise
- Operating rules: General operating rules (Part 91)
- Location: 60.7894° N, 145.6093° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=60.7894&lon=-145.6093&mi=10
- Aircraft: N3850Z, a cancelled registration (https://openairdocs.org/deregistered/N3850Z-2013-04-17) (OpenAirDocs)
- Registry model: Piper PA-18-150 (registry code 7101828, https://openairdocs.org/model/piper-pa-18-150) (OpenAirDocs)
- Registry engine: Lycoming 0-320 series (registry code 41508, https://openairdocs.org/engine/lycoming-0-320-series) (OpenAirDocs)
- Reported make and model: PIPER PA18150
- Reported engine: LYC O320B2B
- Fatal injuries: 0
- Pilot flight hours: 1,000 total, 75 in this make and model, 100 in the last 90 days
- NTSB investigation: [NTSB ANC92FA005](https://openairdocs.org/ntsb/ANC92FA005) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19911015046529A

## Narrative

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

ENGINE SEIZED. DITCHED IN OCEAN. CRANKSHAFT FAILURE DUE OIL STARVATION.WHEN A BEARING ROTATED.IMPROPER SEALING 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 ANC92FA005](https://openairdocs.org/ntsb/ANC92FA005), Oct 16, 1991: Piper PA-18 (N3850Z), Montague Island, AK, substantial damage. Probable cause: THE POWER LOSS DUE TO THE CRANKSHAFT FAILURE. CONTRIBUTING TO THE ACCIDENT WAS IMPROPER MAINTENANCE DURING THE LAST ENGINE OVERHAUL.

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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