Service difficulty report · Cylinder

Difficulty date
October 30, 2000
Submitted
December 18, 2000
Operation
General aviation
Engine
Cont IO520*
Engine time
1,831 hours
Part
Cylinder
Part number
CLASS71
Condition
Delaminated
Location
Engine
Part time
1,831 hours
Stage of operation
CL
How discovered
W
Nature of condition
Y
Precautionary procedure
A

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

What was found

CERMINIL COATING DELAMINATED FROM ONE STEEL CYL BORE AT 82.2 HRS TSO. POSSIBLE CAUSE, SOME INDIVIDUAL POSSIBLY TOUCHED CYL BORE JUST BEFORE PROCESSING. TOUCHING CYL BORE AFTER FINAL CLEANING AND/OR DURING PROCESSING IS STRICTLY PROHIBITED IN SPECS FOR PROCESS BECAUSE CONTAMINATION FROM PERSON'S HAND CAN CAUSE ADHERENCE PROBLEMS. THE AUTOMATED PRE-TREAT PROCESS WAS POSSIBLY INTERRUPTED THROUGH SOME ELECTRIC OR COMPUTER ANOMALY AND REQUIRED PRE-TREATMENTS WERE NOT COMPLETED. PLATING PROCESS ACCOMPLISHED THROUGH COMPUTER, ROBOTIC MANIPULATION. COMPUTER REPORTS PROCESSING PROBLEMS, BUT THERE WERE NO REPORTS ASSOCIATED WITH THIS PARTICULAR CYLINDER. (X)