# Accident 19910914044459A: Aerosp ATR42300, Muskegon, MI, September 14, 1991

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: September 14, 1991, 18:05 local time
- Place: Muskegon, MI
- Airport: Muskegon County
- Phase of flight: Fcd/Prec Ldg From Cruise
- Operating rules: Air carrier (Part 121)
- Operator: SIMA
- Location: 43.2200° N, 86.2502° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=43.2200&lon=-86.2502&mi=10
- Aircraft: N243AT (not matched to a registry record)
- Reported make and model: AEROSP ATR42300
- Reported engine: PWA PW120
- People aboard: 25
- Fatal injuries: 0
- Pilot flight hours: 4,346 total, 700 in this make and model, 214 in the last 90 days
- NTSB investigation: [NTSB CHI91LA300](https://openairdocs.org/ntsb/CHI91LA300) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19910914044459A

## Narrative

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

SMOKE IN CABIN AND COCKPIT. DIVERTED. PASSENGER INJURED EVACUTING. NR4 BEARING FAILED. BROKE SEAL. OIL IN BLEED AIR

## 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 CHI91LA300](https://openairdocs.org/ntsb/CHI91LA300), Sep 14, 1991: ATR ATR 42-300 (N243AT), Muskegon, MI, no damage. Probable cause: THE FAILURE, FOR REASONS UNKNOWN, OF THE NUMBER FOUR BEARING IN THE HIGH PRESSURE SPOOL OF THE ENGINE.

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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