What was found
LAS/ORD - FLT 0701 - WHEN LANDING GEAR SELECTED DOWN, GEAR DOORS AMBER, GEAR DID NOT EXTEND. CYCLED SELECTOR GEAR, GEAR DOWN NORMAL. NO FAULTS FOUND RECORDED ON L.G.C.I.U. BOTH L.G.C.I.U'S CHECK GOOD. REMOVED AND REPLACED NR 1 L.G.C.I.U. TO UPGRADE TO MOD 4B. INTERROGATED C.F.D.S. POST-FLIGHT FAULTS ON L.G.C.I.U., NR 1 AND NR 2. NO FAULTS FOUND. CHECKED UPLOCK CIRCUIT CONTINUITY FROM SELECTOR TO L.G.C.I.U.'S. CHECKED GOOD. REMOVED AND REPLACED WING GEAR DOOR ACTUATOR PER 32-31-11. REMOVED AND REPLACED LANDING GEAR SELECTOR VALVE PER 32-31-12. FUNCTION CHECK GOOD. REFERENCE OPERATOR CONTROL NR 96ZZZX566. (X)