As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY DECLARED. CREW RECEIVED LANDING GEAR NOT DOWNLOCKED MESSAGE. HANDLE CYCLED 5X COMPLIED WITH QRH 12-7. GRAVITY EXTENSION COMPLETED SUCCESSFULLY. R & R SAFETY VALVE, 49GA IAW AMM 32-31-17-400-001-A. NO LEAKS NOTED, OPS CHECKS OK. RESTORED MANUAL EXTENSION HANDLE TO NORMAL CONFIGURATION. ACFT OK FOR SERVICE.