Service difficulty report · Cylinder

Difficulty date
October 30, 2000
Submitted
October 30, 2000
Operation
General aviation
Engine
Cont IO520*
Engine time
1,831 hours
Part
Cylinder
Condition
Delaminated
Location
Engine
Part time
1,831 hours
Stage of operation
CL
How discovered
V
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 CYLINDER BORE AT 82.2 HOURS TSO. POSSIBLE CAUSE, SOME INDIVIDUAL POSSIBLY TOUCHED CYLINDER BORE JUST BEFORE PROCESSING. TOUCHING THE CYLINDER BORE AFTER FINAL CLEANING AND/OR DURING PROCESSING IS STRICTLY PROHIBITED IN SPECIFICATION FOR THE PROCESS BECAUSE CONTAMINATION FROM A PERSON'S HAND CAN CAUSE ADHERENCE PROBLEMS. THE AUTOMATED PRE-TREAT PROCESS WAS POSSIBLY INTERRUPTED THROUGH SOME ELECTRICAL OR COMPUTER ANOMALY AND THE REQUIRED PRE-TREATMENTS WERE NOT SATISFACTORLY COMPLETED. THE PLATING PROCESS IS PRIMARILY ACCOMPLISHED THROUGH COMPUTER AND ROBOTIC MANIPULATION. SUBMITTER STATED THE COMPUTER REPORTED PROCESSING PROBLEMS. (X)