As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING SCHEDULED REPLACEMENT OF ENGINE DRIVEN FUEL PUMP FOR 600 HR INSP. PUMP/FCU WAS REMOVED IAW MM REMOVAL/DISASSEMBLY CAUTION INSTRUCTIONS (73-20-01, PG 2) TO PREVENT BLUE GREASE CONTAMINATION. BLUE GREASE WAS DISCOVERED ON THE ATTACHED FCU INTERFACE TO PUMP. FCU AND PUMP REPLACED.