# Accident 19970626016049A: Cessna 172A, Ogden, UT, June 26, 1997

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: June 26, 1997, 09:15 local time
- Place: Ogden, UT
- Damage: Substantial damage
- Phase of flight: Fcd/Prec Ldg From Cruise
- Operating rules: General operating rules (Part 91)
- Location: 41.1794° N, 111.9093° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=41.1794&lon=-111.9093&mi=10
- Aircraft: N6844X, a cancelled registration (https://openairdocs.org/deregistered/N6844X-2004-04-27) (OpenAirDocs)
- Registry model: Cessna 172A (registry code 2072404, https://openairdocs.org/model/cessna-172a) (OpenAirDocs)
- Registry engine: Continental 0-300 series (registry code 17022, https://openairdocs.org/engine/continental-0-300-series) (OpenAirDocs)
- Reported make and model: CESSNA 172A
- Reported engine: CONT O300C
- People aboard: 1
- Fatal injuries: 0
- Pilot flight hours: 400 total, 400 in this make and model
- NTSB investigation: [NTSB SEA97LA152](https://openairdocs.org/ntsb/SEA97LA152) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19970626016049A

## Narrative

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

PILOT REPORTED A ROUGH RUNNING ENGINE AND ATTEMPTED TO MAKE IT BACK TO AIRPORT, MADE EMERGENCY LANDING. (.4)ABOUT 30 MINUTES AFTER TAKEOFF, THE ENGINE BEGAN TO RUN ROUGH AND LOSE POWER.  THE FIRST PILOT (PILOT-IN-COMMAND) ATTEMPTED TO REGAIN FULL POWER AND RETURN TO THE DEPARTURE AIRPORT.  THE AIRPLANE CONTINUED TO DESCEND AND THE FIRST PILOT ATTEMPTED TO LAND IN A HAYFIELD ABOUT FOUR MILES FROM THE AIRPORT.  DURING THE FORCED LANDING, WHICH OCCURRED IN A TAILWIND, THE PILOT NOTICED POWER LINES AHEAD.  HE FORCED THE AIRPLANE ONTO ROUGH TERRAIN BENEATH THE POWER LINES. THE AIRPLANE NOSED OVER ON LANDING AND WAS SUBSTANTIALLY DAMAGED.  AN EXAMINATION OF THE ENGINE REVEALED THAT THE EXHAUST VALVE STEM ON THE NO. 4 CYLINDER HAD SEPARATED FROM THE VALVE HEAD.  THE FRACTURE SURFACE WAS OBLITERATED AND THE MODE OF FAILURE COULD NOT BE DETERMINED.  AFTER THE FAILURE OF THE VALVE, FURTHER DAMAGE TO OTHER CYLINDER COMPONENTS SUBSEQUENTLY OCCURRED AS THE ENGINE CONTINUED TO OPERATE IN A DEGRADED CONDITION.  THE NO. 4 CYLINDER HAD BEEN REWORKED ABOUT 108 FLIGHT HOURS PRIOR TO THE ACCIDENT.

## 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 SEA97LA152](https://openairdocs.org/ntsb/SEA97LA152), Jun 26, 1997: Cessna 172A (N6844X), Ogden, UT, substantial damage. Probable cause: The fracture of the no. 4 exhaust valve and subsequent loss of engine power. Factors contributing to the accident include a congested landing area, and rough terrain.

## Other reports on N6844X (1)

Matched to the same aircraft by N-number and date.

- [Accident 19760130003349A](https://openairdocs.org/incident/19760130003349A), Jan 30, 1976: Cessna 172A (N6844X), Logan, UT, Substantial damage. Dest fogged in,didnt go to alt arpt. Attmptd ldg on snow covered road. Hit tree & sign post.

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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