What was found
AFTER T/O LANDING GEAR FAILED TO RETRACT RAN THE "LANDING GEAR LEVER LATCH FAILED TO RELEASE" CHECKLIST TEST NR 1 FAIL, TEST 2&3 PASSED. RETURN TO MEMPHIS NORMAL LANDING. FOUND LEFT MAIN GEAR SAFETY SENSOR ACTUATOR CENTER PIVOT BOLT LOOSE AND NUT BACKED OFF TO LAST THREAD CAUSING EXCESSIVE GAP TO SENSORS. REPLACED NUT AND IAW B727-200 AMM 32-09-221-4. GAP NOW WITHIN LIMITS. SWUNG GEAR IAW B727-200 AMM 32-61-001-5, ALL CHECKS GOOD.