As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PRECAUTIONARY INSPECTION OF THE FUEL PUMP DRIVE SPLINE IAW MM, FUEL PUMP COUPLING IN-SITU INSPECTION. MAINTENANCE FOUND THE FUEL PUMP DRIVE SPLINE CORRODED. THE FUEL PUMP ASSEMBLY WAS REPLACED WITH AN OVERHAULED UNIT AND THE AIRCRAFT RETURNED TO SERVICE. (K)