As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 972 - ATB - DUE TO NLG FAILED TO RETRACT, EXTENDED THE MLG AND RETURNED TO ATL, NO EMERGENCY DECLARED. CORRECTIVE ACTION. TROUBLESHOOTING IN PROGRESS. RESTRICTOR VALVE NO HELP. C/W NO-GO ODI PREVENTION. FOUND UPPER SIDE CHECK VALVE BYPASSING ON NLG HYDRAULIC SYSTEM T-FITTING. REPLACED UPPER CHECK VALVE. NOW CHECKS GOOD. SDR REPORTED DUE TO FACT THAT THE MCC NOTIFICATION MENTIONED A DECLARED EMERGENCY. (LP5428112)