What was found
A NASTY FOUL SOUR ODOR IS COMING FROM THE AIR CONDITIONING SYS. REMOVED LT & RT COALESCER SOCKS, THE SOCKS HAD A STRONG OIL ODOR. INSPECTED APU INLET & FOUND OIL IN APU INLET. REMOVED APU. INSTALLED A REPAIRED APU. APU WAS INSTALLED WITH SIX EACH NEW MOUNTS. APU FIRE TEST FAILED, RANG OUT FIRE LOOP & FOUND DEFECTIVE, FOUND FIRE LOOP CHAFED THROUGH. REMOVED UNSERVICEABLE FIRE LOOP, PN 9912416-1, SN 212657. INSTALLED A NEW FIRE LOOP. LEAK & OPERATIONAL CHECK WAS FOUND TO BE SATISFACTORY. ACCOMPLISHED TC-750-21-120801M R1, ECS, DUCT BURN OUT. INSTALLED TWO NEW COALESCER SOCKS, PN 21BC115 SN N/A. ACCOMPLISHED IAW MM 49-10-00, 26-11-00 & 21-51-00.