As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENGINE HIGH PRESSURE FUEL PUMP FAILED. DISASSEMBLY REVEALED DRIVE COUPLER SPLINES WORN OUT ON PUMP. OIL MISTING HOLE PLUGGED, SPLINES RUNNING DRY. THIS CONDITION CAN BE REVEALED BY PUSHING A PIPE CLEANER INTO PUMP DRAIN CAVITY. RUST DEPOSITS INDICATE LACK OF LUBRICATION TO DRIVE COUPLER. RECOMMEND PERIODIC INSPECTION OF PUMP DRAINS FOR THIS CONDITION.