Service difficulty report · Piston

Difficulty date
February 1, 2012
Submitted
September 14, 2015
Operation
General aviation
Part
Piston
Part number
41012001
Condition
Worn
Location
M/R Servo
Part time
13,216 hours
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

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

What was found

(CAN) PLASMA COATING HAS DETACHED FROM THE HEAD OF THE PISTONS AS FOLLOWS: PISTON SN AP4-0203, 75 PERCENT OF THE UPPER RING. PISTON SN AP4-0202, 25 PERCENT OF BOTH RINGS.