As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ATB GEAR - RETURNED TO ATL DUE TO MLG DISAGREE AFTER TO. GEAR DID NOT COME UP WITH THE GEAR HANDLE RAISED. NOSE GEAR SHOWED UP AND BOTH MAINS SHOWED UNSAFE. CYCLED THE GEAR DOWN AND WAS INDICATING NORMAL. REPLACING MLG SELECTOR/BYPASS VALVE PER AMM AND ONE HYDRAULIC LINE DUE TO LEAKAGE NOTED DURING T/S. LP 6295050