As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON GEAR RETRACTION, GEAR DISAGREE WARNING MESSAGE. COMPLIED WITH QRH. DOWNLOADED FDR AND FOUND BOTH LT AND RT MLG UPLOCKS INTERMITTENT UPA AND LOCKED. SUSPECT BAD PSEU, REMOVED AND REPLACED PSEU IAW MM. OPS CHECK GOOD. PERFORMED FUNCTION CHECKS OF LANDING GEAR EXTENSION AND RETRACTION IAW MM. CHECK GOOD. (K)