Service difficulty report · Spring

Difficulty date
July 30, 2008
Submitted
November 3, 2008
Operation
General aviation
Engine
Cont IO520F
Part
Spring
Condition
Broken
Location
Exhaust Valve
Part time
13 hours
Component
Cylinder · Eci
Component part number
TISN712ACA
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

(CAN) CYLINDER WAS PULLED DUE TO LOW COMPRESSION. WHEN THE ROCKER COVER WAS REMOVED IT WAS DISCOVERED THAT BOTH THE INNER AND OUTER EXHAUST VALVE SPRINGS WERE BROKEN INTO MANY PIECES.