What was found
CAPTAIN REPORTED LOSS OF HYDRAULIC FLUID IN LT SIDE. DURING REVISION DETECTED A LEAK IN LT MAIN PUMP, SO IT WAS REPLACED IAW MM 29-11-11 AC WAS DISPATCHED. AC RETURNED TO PLATFORM, DURING TAXING PSEU AND LT HYDRAULIC SYS LIGHTS TURNED ON. BREAKERS D1 AND D2 WERE RESEATED TURNING OFF PSEU LT AND HYDRAULIC PUMP WAS REPLACED, SHAFT DAMAGED; ADDITIONALLY THE LT A/C PACKAGE, PNEUMATIC APU WERE DEFERRED DUE TO CONTAMINATION. DURING OVERNIGHT, MAIN PUMP O-RING AND NIPPLE WERE REPLACED IAW MM 20-10-11 AND 20-50-1. THE FIM 21-00 PROCEDURE TASKS 801 TO 804 WERE PERFORMED IAW LT A/C PACKAGE CONTAMINATION. ADDITIONALLY THE APU, LT A/A PACKAGE AND PSEU WERE TESTED IAW MM 49-11-00, 21-00 AND FIM 32-09 TASK 801, ALL CORRECT.