# Accident 19980304002569A: Cessna 150M, Haverhill, MA, March 4, 1998

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: March 4, 1998, 09:06 local time
- Place: Haverhill, MA
- Damage: Destroyed
- Phase of flight: Fcd/Prec Ldg From Cruise
- Operating rules: General operating rules (Part 91)
- Location: 42.7762° N, 71.0773° W: Placed by OpenAirDocs: center of Haverhill, MA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.7762&lon=-71.0773&mi=10
- Aircraft: N63387, a cancelled registration (https://openairdocs.org/deregistered/N63387-1998-09-28) (OpenAirDocs)
- Registry model: Cessna 150M (registry code 2071830, https://openairdocs.org/model/cessna-150m) (OpenAirDocs)
- Reported make and model: CESSNA 150M
- Reported engine: CONT O200A
- People aboard: 3
- Fatal injuries: 0
- Pilot flight hours: 1,520 total, 900 in this make and model, 180 in the last 90 days
- NTSB investigation: [NTSB IAD98LA034](https://openairdocs.org/ntsb/IAD98LA034) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19980304002569A

## Narrative

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

ACFT EXPER A ROUGH RUNNING ENGINE, MADE AN EMERGENCY LANDING AT OLD DUTTON ARPT. RAN OFF END OF RWY. (.4)IN LEVEL FLIGHT AT 2,000 FEET, THE ENGINE BEGAN RUNNING ROUGH WITH AN ASSOCIATED VIBRATION.  THE CFI TOOK CONTROL OF THE AIRPLANE AND THE VIBRATION BECAME STRONGER.  AFTER SHUTTING DOWN THE ENGINE, THE CFI ATTEMPTED TO LAND ON AN ABANDONED RUNWAY.  THE AIRPLANE IMPACTED TREES APPROXIMATELY 100 FEET BEYOND THE DEPARTURE END OF THE ABANDONED RUNWAY.  EXAMINATION OF THE ENGINE LOGBOOKS AND DISCUSSIONS WITH THE OPERATOR DISCLOSED THAT THE ENGINE WAS 362 HOURS BEYOND TIME BETWEEN OVERHAUL (TBO) AND AUTOMOTIVE FUEL WAS UTILIZED WITHOUT A SUPPLEMENTAL TYPE CERTIFICATE.  DISASSEMBLY OF THE ENGINE REVEALED THE NUMBER TWO CYLINDER'S EXHAUST VALVE WAS FRACTURED AND THE CYLINDER WAS CRACKED.  AN EXAMINATION OF THE FRACTURED EXHAUST VALVE BY THE MATERIALS LABORATORY DIVISION OF THE NATIONAL TRANSPORTATION SAFETY BOARD REVEALED THAT THE 'SHANK AREA IMMEDIATELY ADJACENT TO THE FRACTURE WAS REDUCED IN SIZE, AND THE FRACTURE FEATURES WERE INDICATIVE OF BENDING OVERSTRESS SEPARATION WITH NO INDICATIONS OF PRE-EXISTING CRACKING.'                                                                     (-23) ENGINE FAILURE. EXHAUST VALVE STEM ELONGATED THEN FAILED NEAR HEAD.  CATASTROPHIC DAMAGE TO PISTON AND CYLINDER.

## 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 IAD98LA034](https://openairdocs.org/ntsb/IAD98LA034), Mar 4, 1998: Cessna 150M (N63387), Haverhill, MA, destroyed. Probable cause: A loss of engine power due to a fractured number two cylinder exhaust valve and cracked cylinder. Contributing factors were the operator's allowance of the time between engine overhaul to be exceeded…

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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