What was found
ELEVEN(11) CFM56-7B FUEL NOZZLES,PN 6840023E18,WERE RECEIVED FOR BENCH TEST AND REPAIR IAW CMM 73-11-42. NINE(9) OF THE ELEVEN(11) NOZZLES FAILED BENCH TEST AND WERE MOVED TO REPAIR. UPON REMOVAL OF THE FLOW DIVIDER VALVES, THE MACHINIST NOTICED THAT THE WRONG VALVE WAS INSTALLED IN 4 OF THE NOZZLES AS WELL AS THE WRONG O-RINGS FOR THOSE VALVES. THE CORRECT VALVE FOR FUEL NOZZLE 6840023E18 IS PN 6062120. THE CORRECT O-RING SEALS FOR VALVE PN 6062120 ARE PN'S 6062124-001 (WHITE), AND 6062125 (BROWN). THE INCORRECT VALVES FOUND INSTALLED IN THE SUBJECT NOZZLES ARE PN 6002135. THIS VALVE IS FOUND INSTALLED PRIMARILY ON FUEL NOZZLE 6840023M1 WITH A BLACK O-RING PN 6871674-965. IT APPEARS THAT THESE FOUR NOZZLES, SN PCY049E1, PCY068E1, PCY067E3, AND PCY067E6, WERE IMPROPERLY UPDATED FROM 6840023M1 TO 6840023E18 IAW SB 73-0132. EVIDENCE OF UPDATE AFTER OEM MFG INCLUDES LINED OUT MARKINGS, VISUALLY POOR QUALITY VALVE COVER WELDS, INCORRECT FLOW DIVIDER VALVE INSTALLED AND INCORRECT O-RING SEALS INSTALLED. THE SUBJECT FUEL NOZZLES HAD NOT BEEN PREVIOUSLY MAINTAINED AT THIS REPAIR STATION.