As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 876 - MNL - AFTER TAKEOFF, UNABLE TO RAISE THE LANDING GEAR, RETURNED TO MNL. ON TROUBLE SHOOTING CONFIRMED HANDLE WILL NOT GO PAST OFF DURING NORMAL OPERATION. FOUND AIR SENSING SENSOR M831 AT FAULT. REPLACED SAME, OPERATION AND TEST NORMAL. (M)