What was found
CREW REPORTED, (STRONG FUEL ODOR IN AIRCRAFT WHILE APU IS RUNNING.) MAINTENANCE TROUBLESHOT NO DEFECTS FOUND AND PLACED THE AIRCRAFT ON MEL FOR FURTHER FOLLOWUP. STL MAINTENANCE OPS. CHECKED THE APU WITH BOTH PACKS NR 1 AND NR 2 RUNNING FOR 30 MINUTES, NO DEFECTS, NO FUEL ODOR NOTED AT THIS TIME. OPS CHECKED GOOD, MEL PLACARD ITEM REMOVED AND AIRCRAFT RETURNED TO SERVICE -SDR CLOSED-