As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN INSPECTING FUEL PUMP IAW CAB 05-18 AND PWC1645 FOR REDDISH-BROWN STAIN ON COUPLING SHAFT AREA. FOUND NO VISIBLE SIGN. COUPLING WAS LOOSE ON SHAFT WHEN COUPLING WAS REMOVED. FOUND SPLINES WORN ON FUEL PUMP AND COUPLING. THE SB MUST SUPPLY A MEANS TO REMOVE COUPLING AND INSPECT SPLINE ON FUEL PUMP AND WEAR LIMITS SHOULD BE KNOWN FOR PROPER INSPECTION OF FUEL PUMP. (K)