What was found
GEAR POSITION & WARNING: AFTER TAKEOFF AND GEAR SELECTED UP WE HEARD LOUD AIR NOISE AND A AMBER NOSE GEAR DOOR MESSAGE SOON AFTER THAT LEFT AND RIGHT GEAR MAIN GEAR AMBER DOOR MESSAGES. WE COMPLIED WITH CHECKLIST AND MADE A NORMAL LANDING AT OUR DEPARTURE AIRPORT. ADJUSTED NLG UPLOCK AND DOWNLOCK PROXIMITY SENSORS TO BE WITHIN CORRECT LIMITS IAW AMM 32-61-05. NO DEFECT NOTED. OPS CHECK GOOD.