OpenAirDocs.org

19970626016049A

Accident · Substantial damage
Open the Markdown

FAA accident report · Cessna 172A · Ogden, UT · June 26, 1997

FAA Aviation Safety Information Portal

© OpenStreetMap
Date
June 26, 1997 · 09:15 local
Place
Ogden, UT
Phase of flight
Fcd/Prec Ldg From Cruise
Operating rules
General operating rules (Part 91)
Damage
Substantial damage
Aircraft
N6844X
NTSB investigation
NTSBSEA97LA152
Reported as
Cessna 172A
Reported engine
Continental O300C
People aboard
1
Fatal injuries
0
Pilot’s flight hours
400 total400 in this make and model
N6844XRegistration cancelled Apr 27, 2004 · Cessna 172AS/N 47744 · Built 1960Airframe modelCessna 172AEngine modelContinental 0-300 seriesReciprocating

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry 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.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

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.

As the FAA filed it

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.

NTSB investigation

The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.

NTSB SEA97LA152Accident · Minor injuriesLimited investigationFinal reportOgden, UTThe 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.Jun 26, 1997 · Substantial damage

Other reports on N6844X · 1

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

Accident 19760130003349ARoll-Out (Fixed Wing) · Logan, UTDest fogged in,didnt go to alt arpt. Attmptd ldg on snow covered road. Hit tree & sign post.Jan 30, 1976 · Substantial damage