As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, RECEIVED GEAR DISAGREE MESSAGE APPROXIMATELY 6 SECONDS AFTER HANDLE SELECTION. IN TRANSIT MESSAGE CONFIRMED FOR ABOUT 20 MINUTES. MAINS SHOWED YELLOW DURING THE 20 MINUTES. R & R MLG SELECTOR VALVE IAW 32-32-10. OPS CHECK/LEAK CHECK GOOD. GEAR RETRACTION/EXTENSION GOOD. REMOVED PLACARD AND FROM MEL.