What was found
DURING AN INSPECTION, DISCOVERED LT WING DE-FUEL VALVE HAD DAMAGED THREADS, AND NEEDED TO BE REPLACED. REMOVED VALVE FROM AIRCRAFT AND ORDERED A REPLACEMENT VALVE, PN 2770086-103. RECEIVED A NEW VALVE, INSPECTED IT, AND FOUND IT OKAY TO INSTALL. AT INSTALLATION, FOUND THE HOLES SLIGHTLY MISALIGNED. VALVE DID FIT, HOWEVER, LEAK CHECKS FAILED. VALVE WAS REMOVED AND A REPLACEMENT VALVE ORDERED AND INSTALLED WITHOUT ANY MATING OR MISALIGNMENT PROBLEMS. THIS VALVE WAS A NEW VALVE, SN 1395, RECEIVED FROM CANADAIR AS THEY RECEIVED IT FROM PARKER. FINAL INSPECTION AT BOTH FACILITIES DID NOT REVEAL DEFECT. RECOMMEND A CHECK OF OTHER UNITS IN STOCK AND AT THE MFG TO PREVENT THESE OCCURRENCES FROM RECURRING.