As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEAR DISAGREE AND DOOR WARNING MESSAGE INFLIGHT, COMPLIED WITH QRH AND RETURNED TO PHL. FOUND ERROR CODE D046/SELECTOR VALVE IN PSEU. CLEANED CONNECTOR AND FILTER AT NLG SELECTOR VALVE. PERFORMED NLG EXTENSION AND RETRACTION TEST IAW AMM 32-33-00. OPS CHECK GOOD. (M)