Pilot Debrief

CESSNA 177 near Kinston, NC — 2009-04-24

Final reportERA09LA271
Sign in to save
Date
2009-04-24
Location
Kinston, NC, USA
Aircraft
CESSNA 177
Registration
N2803X
Category
Airplane
Highest injury
None
Fatalities
0
Phase of flight
Cruise

Probable cause

A partial loss of engine power due to the failure of the No. 1 cylinder exhaust valve for undetermined reasons.

NTSB narrative

During cruise flight the pilot stated that the engine suddenly and without warning began running rough with "...much vibration." He reduced power, which reduced the vibration, and the airplane began losing altitude. He proceeded to the nearest airport but after recognizing that he would be unable to land there, he maneuvered the airplane for a forced landing in a field. Examination of the engine revealed the No. 1 cylinder exhaust valve was broken and the top of the No. 1 cylinder and piston were damaged by the broken valve. Although the engine was last overhauled on August 12, 1989, the cylinders were not replaced at that time. The overhaul entry indicates that the cylinders were only inspected and honed. Further, there was no record that the No. 1 cylinder had been removed and replaced since the engine was overhauled. The engine had accumulated approximately 1,310 hours since overhaul at the time of the accident. The reason for the No. 1 exhaust valve failure was not determined.

Analysis

Primary failure mode
Engine power loss
First missed decision gate
Pilot could have conducted a more thorough preflight engine inspection.

NTSB coding

Evidence available

  • Photos
  • 6 docket documents
View NTSB final reportView NTSB docket

Docket documents6

Related mishaps