As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEAR DISAGREE MESSAGE WHEN BRINGING GEAR UP AFTER TAKEOFF. COMPLIED WITH QRH PROCEDURE AND GEAR CAME UP WITHIN TWO MINUTES AFTER GEAR UP SELECTION. MESSAGE RETURNED WHEN SELECTING GEAR DOWN FOR RETURN TO FIELD AND EXTINGUISHED WITH TWO MINUTES OF GEAR DOWN SELECTION. LANDED WITH GEAR DOWN & LOCKED. THE NOSE GEAR WAS THE DISAGREEING GEAR. R & R MLG MANUAL RELEASE RELIEF VALVE IAW AMM.