1992-09-15: Piper PA-22 — Graham, Robert L. — Jasper, TN

Casualties unknown • Jasper, TN, US

Probable cause

THE FRACTURED VALVE WHICH RESULTED IN A TOTAL LOSS OF ENGINE POWER, WHILE FLYING OVER TERRAIN THAT WAS NOT SUITABLE FOR A FORCED LANDING. A FACTOR WAS THE DENSELY WOODED, MOUNTAINOUS TERRAIN.

— NTSB Determination

Accident narrative

DURING CRUISE FLIGHT THE PILOT HEARD A BANG, FOLLOWED BY A LOSS OF ENGINE POWER. THE AIRPLANE WAS BEING FLOWN OVER DENSELY WOODED, MOUNTAINOUS TERRAIN. A FORCED LANDING WAS MADE TO A LOGGED CLEARING, WHICH RESULTED IN A NOSE OVER WHEN THE NOSE WHEEL CONTACTED A CUT LOG. A SUBSEQUENT EXAMINATION OF THE ENGINE REVEALED THAT THE NUMBER 2 CYLINDER EXHAUST VALVE HAD BECOME STUCK IN THE OPEN POSITION. THE CYLINDER & PISTON EXHIBITED EXTREME IMPACT DAMAGE FROM THE FRACTURED VALVE.

Frequently asked questions

What happened in the 1992-09-15 Piper PA-22 accident near Jasper, TN?

DURING CRUISE FLIGHT THE PILOT HEARD A BANG, FOLLOWED BY A LOSS OF ENGINE POWER. THE AIRPLANE WAS BEING FLOWN OVER DENSELY WOODED, MOUNTAINOUS TERRAIN. A FORCED LANDING WAS MADE TO A LOGGED CLEARING, WHICH RESULTED IN A NOSE OVER WHEN THE NOSE WHEEL CONTACTED A CUT LOG. A SUBSEQUENT EXAMINATION OF THE ENGINE REVEALED…

What aircraft was involved and where did it happen?

The accident on 1992-09-15 involved a Piper PA-22, registration N8005C, operated by Graham, Robert L., at Jasper, TN.

What was the probable cause of the accident?

THE FRACTURED VALVE WHICH RESULTED IN A TOTAL LOSS OF ENGINE POWER, WHILE FLYING OVER TERRAIN THAT WAS NOT SUITABLE FOR A FORCED LANDING. A FACTOR WAS THE DENSELY WOODED, MOUNTAINOUS TERRAIN.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001211X15596. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.

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