What was found
GEAR UP DISAGREE FOR NLG UPON RE-TRACTION. RAN QRH, GEAR DEPLOYED AND LOCKED WITH ALL INDICATIONS GREEN. RETURNED TO FIELD. (FLIGHT 4081) FOUND THE FOLLOWING B1 CODES AT TIME OF EVENT 007451 065387 065386 007427 007432. TROUBLESHOT GEAR DISAGREE IAW FIM 32-21-00. PERFORMED FAULT ISOLATION ACTIONS PER FIM. PERFORMED MULTIPLE GEAR SWINGS & ALTERNATE RELEASE, IAW AMM 32-30-00 & AMM 32-34-00, COULD NOT DUPLICATE FAULT & OPS CHKD GOOD. OPS CHKD PRIORITY VALVE IAW AMM 29-12-05, OPS CHKD GOOD. NO REPEAT FAULT HISTORY IN ACFT LOGS OR MDC FOUND. DUE TO MULTIPLE PROX SENSORS FLAGGED DURING FAULT, R & R PSEU IAW AMM 32-61-01, OPS CHKD GOOD. PERFORMED ADDITIONAL GEAR SWINGS, OPS CHKD GOOD & NO DEFECTS NOTED.