What was found
AIRCRAFT RETURNED OF FLIGHT, HIGH TEMPERATURE ON LT CONSTANT SPEED DRIVE (CSD), AND APU OUT OF SERVICE. LT CSD WAS CHECKED AND HIGH LEVEL OF OIL WAS DETECTED, OIL SERVICE WAS PERFORMED IAW MM 12-12-52, CSD AND APU WERE OPERATIVE, ALL CORRECT. DURING OVERNIGHT SERVICE, HEAT EXCHANGE ASSY AIR/OIL AND CONSTANT SPEED DRIVE WERE REPLACED IAW 24-10-01 AND 24-10-03, TESTS CORRECT.