What was found
PDIS 528 32-30 9512 06DEC21 OAK OPEN U AT GEAR RETRACTION, LT MAIN REMAINED RED WITH OTHER GEAR LIGHTS OUT, CYCLED GEAR BACK DOWN AND GOT 4 GREEN LIGHTS. RETRACTED THE GEAR HANDLE UP AND ALL LIGHTS REMAINED RED AND NO LIGHTS OUT WITH GEAR HANDLE CONFIRMED UP. PUT GEAR HANDLE BACK DOWN AND LEFT MAIN GRAVITY FELL IMMEDIATELY TO GREEN AND OTHER 3 TOOK NORMAL SEQUENCING TIME TO GREEN. RETURNED TO OAK TO NORMAL LANDING. NO OTHER INDICATIONS OTHER THAN 2750 PSI SYS 3 WHILE CYCLING THE GEAR. TAXI BACK UNEVENTFUL. 06DEC21 22:46 OAK R ATA CHANGED:: NEW ATA ::3230 OLD ATA ::0 CHANGED BY ::658072 CHANGED ON ::2021-12-06 22:46:56.12 REPLACED LEFT GEAR RETRACT CYCLINDER DUE TO ACTUATOR BYE PASSING. REF MD-11 AMM 32-33-20-4 OPS CHECK AND LEAK CHECK GOOD NO LEAKS NOTED.