What was found
DURING T/O WITH WEIGHT OFF LDG GEAR, LDG GEAR LEVER LATCH FAILED TO RELEASE, CB ON P6-3 WERE IN. UPON RETRACTING FLAPS IAW CHECKLIST FROM 5 TO 2 DEGREES, RECEIVED A T/O WARNING HORN. GEAR REMAIN DOWN ON THE GRD, RT MAIN IND LT FLASHES. REMOVED AND REPLACED BOTH AIR AND GROUND SENSING SENSORS (M831, M832), IAW MFG MM 32-0-221. OPS TESTED GOOD AND OK FOR RETURN TO SERVICE. OFF (PN 1899-15), ON (SN 163996), POS AIR REA 02.