What was found
LEFT GEAR DOOR NOT LATCHED IN-FLIGHT AND RED GEAR UNSAFE LIGHT ON. RECYCLED GEAR TWICE. LIGHT FOR LEFT GEAR DOOR WENT OUT THEN BACK ON. PUT GEAR DOWN. FOUND THROUGH-BOLT AT TORQUE TUBE DRUM LOOSE. PERFORMED TEST I/A/W DC-8 M.A.B. 32-6, DATED 03-22-91. LATCH TEST WAS GOOD, RE-ASSEMBLED CABLE AND TESTED. OPS CHECKED GOOD.