# Accident 19910311005209A: Cessna 421B, Tucson, AZ, March 11, 1991

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: March 11, 1991, 18:58 local time
- Place: Tucson, AZ
- Damage: Substantial damage
- Phase of flight: Forced/Precautionary Landing
- Operating rules: General operating rules (Part 91)
- Operator: SKKA
- Location: 32.1504° N, 110.9307° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=32.1504&lon=-110.9307&mi=10
- Aircraft: N924MD, a cancelled registration (https://openairdocs.org/deregistered/N924MD-2012-10-09) (OpenAirDocs)
- Registry model: Cessna 421B (registry code 2076014, https://openairdocs.org/model/cessna-421b) (OpenAirDocs)
- Registry engine: Continental GTSIO-520-C (registry code 17035, https://openairdocs.org/engine/continental-gtsio-520-c) (OpenAirDocs)
- Reported make and model: CESSNA 421B
- Reported engine: CONT GTSIO520H
- Fatal injuries: 0
- Pilot flight hours: 4,800 total, 400 in this make and model, 180 in the last 90 days
- NTSB investigation: [NTSB LAX91LA129](https://openairdocs.org/ntsb/LAX91LA129) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19910311005209A

## Narrative

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

TURBOCHARGER REAR CLAMP BROKE ON TAKEOFF. LOST TAILPIPE AND POWER RIGHT ENGINE,BEGAN TURN BACK.FEATHERED . HIT WIRE

## 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 LAX91LA129](https://openairdocs.org/ntsb/LAX91LA129), Mar 12, 1991: Cessna 421B (N924MD), Tucson, AZ, substantial damage. Probable cause: THE FATIGUE FAILURE OF THE RIGHT ENGINE TURBO EXHAUST CLAMP, AND, THE FAILURE OF THE FLYING PILOT TO COMPLETE THE SINGLE ENGINE EMERGENCY PROCEDURES IN A TIMELY MANNER. A FACTOR IN THE ACCIDENT WAS…

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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