As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING ROUTINE MAINTENANCE INSPECTION THE COMPRESSION TEST FOR THE LT ENGINE NR 2 CYLINDER WAS FOUND TO BE LOW. PILOTS DID NOT REPORT THAT THE ENGINE WAS RUNNING LOW. THE NR 2 CYLINDER ON THE LT ENGINE WAS DISASSEMBLED, INSPECTED TO THE DEGREE POSSIBLE AT OUR LEVEL WITH NO EVIDENCE OF SIGNIFICANT WEAR OR DAMAGE FOUND. NR 2 CYLINDER ON THE LT ENGINE WAS REPLACED, ENGINE GROUND RUN WITH NO FAULTS FOUND.