# Incident 19851218067369I: Cessna 421C, Alton, IL, December 18, 1985

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: December 18, 1985, 09:45 local time
- Place: Alton, IL
- Airport: Civic Memorial
- Phase of flight: Normal Cruise
- Operating rules: Air taxi and commuter (Part 135)
- Location: 38.9039° N, 90.1512° W: Placed by OpenAirDocs: center of Alton, IL, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.9039&lon=-90.1512&mi=10
- Aircraft: N2658M (not matched to a registry record)
- Reported make and model: CESSNA 421C
- Reported engine: CONT GTSIO520L
- People aboard: 4
- Fatal injuries: 0
- Pilot flight hours: 3,700 total, 550 in this make and model, 90 in the last 90 days
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19851218067369I

## Narrative

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

LEFT ENGINE RAN ROUGH IN FLIGHT. SHUTDOWN AFTER MAGNETO CHECK. DIVERTED. FOUND ROCKER ARM BOLT BROKEN NR2 CYLINDER.

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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