What was found
GEAR DISAGREE ON APPROACH TO BTM€¦.HYDRAULIC 3 LO PRESS CAUTION (FLIGHT 4273) PLEASE REFERENCE AML 691078 PLEASE REFERENCE AML 691079 PLEASE REFERENCE AML 691082 PLEASE REFERENCE AML 691083 PLEASE REFERENCE AML 691087 PLEASE REFERENCE AML 691088 PLEASE REFERENCE AML 691090 PLEASE REFERENCE AML 691091 PLEASE REFERENCE AML 691092 / UPON ARRIVAL OF AIRCRAFT FOUND LARGE AMOUNT OF HYDRAULIC FLUID IN THE NOSE HYDRAULIC BAY. DETERMINED SOURCE OF LEAKAGE TO BE THE NLG SELECTOR VALVE, REPLACED VALVE. SUSPECT THAT UPON GEAR EXTENSION BECAUSE OF THE LOSS OF FLUID FROM THE NLG SELECTOR VALVE, HYD SYSTEM DID NOT HAVE SUFFICIENT FLUID TO EXTEND GEAR BEFORE TIME DELAY FOR GEAR DISAGREE. REPLACED LH AND RH SYS #3 ACMP DUE TO THEM POSSIBLY BEING RAN DRY. INSPECTED ALL SYS #3 HYD DPI'S AND FOUND NONE TO BE EXTENDED. FOUND FLEX LINES ON BOTH ACMP'S TO BE DAMAGED SUSPECTED DUE TO PUMPS BEING RAN DRY. SEE ALL ABOVE REFERENCED AML FOR WORK PERFORMED AND CORRECTIVE ACTION. AFTER ALL MAINTENANCE CORRECTIVE ACTIONS, PERFORMED LANDING GEAR EXTENSION/RETRACTION CHECK IN REFERENCE TO AMM 32-30-00. OPS CHEC