What was found
AFTER T/O GEAR WOULD NOT RAISE, HANDLE NML 3 RED, AURAL INDICATIONS GEAR DOWN. TOWER CONFIRMED ALL GEAR DOWN. DROP GEAR 3 GREEN, ALL HYD INDICATIONS NML. GROUND SENSE DID NOT SENSE WEIGHT ON WHEELS, SPOILER DEPLOYED MANUALLY. DEPRESSURIZED MANUALLY. ON W/A FOUND DOOR BYPASS HANDLE OPEN SECURED SAME. JACKED A/C OPENED BYPASS HANDLE AND VERIFIED PROBLEM. CLOSED BY PASS HANDLE AND CYCLED GEAR SEVERAL TIMES ALL INDICATIONS NORMAL, OK FOR SERVICE.