What was found
AIRCRAFT HAS "DIRTY SOCK" SMELL ON TAKEOFF AND DESCENT. ACCOMPLISHED TASK 05 60 00 280 801C1 PARAGRAPH 2A THRU 2E RAW OIL FOUND IN THE INTERNAL AREAS OF THE DRAIN CAVITY APU REQUIRES REPLACEMENT. REPLACED APU OPS/LEAK CHECKED APU PER T/C 78349010. NO EVIDENCE OF OIL IN REMOVED APU'S BLEED AIR VALVE AND APU COMPARTMENT DUCTING. RAN APU WITH BLEED AIR ON AND STRINGER INSTALLED FOR 1 HOUR. RAN PACKS USING APU AIR AFTER STRINGER REMOVAL. NO ODOR DETECTED. REF MM 21 00 01 100 801 STEPS E(1) E(6)(C).