What was found
SEVERAL DIFFERENT FUEL PUMPS HAVE BEEN SENT TO US FOR REPAIR DUE TO THE UNITS LEAKING FUEL. THESE FUEL PUMPS RANGE FROM TSO = 50 TO TSO= 400. UPON INSP, TINY HOLES HAVE BEEN FOUND IN THE SEAL ASSEMBLIES' RUBBER. THE VARIOUS FUEL PUMPS INVOLVED ARE AS FOLLOWS: PN: 2PR400-SERIES, PN: FP-300-P, AND PN: 51076-1. WE HAVE NOT BEEN ABLE TO PIN-POINT THIS PROBLEM TO ANY ONE PARTICULAR LOT NUMBER. WE ARE WORKING , TRYING TO RESOLVE THIS ISSUE. WE HAVE ALSO CONTACTED OUR LOCAL FSDO. UNTIL THIS ISSUE IS RESOLVED, WE ARE OPTING TO STOP REPAIRING/OVERHAULING ANY OF THE AFFECTED FUEL PUMPS.