As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, DURING GEAR RETRACTION RT MLG DISAGREE WARNING MESSAGE & RT MAIN GEAR LIGHT SHOWED RED UNSAFE. COMPLETED QRH FOR LG, EXTENDED GEAR WITH EMERGENCY HANDLE, ALL GEAR DOWN & LOCKED, GREEN RETURNED. TROUBLESHOT IAW FIM 32-60-05 & FOUND RT MLG UPLOCK SENSOR OUT OF ADJUSTMENT. MEASURES .069" IAW AMM 32-32-05 ADJUSTED TO WITHIN LIMITS .035-.045 AT .035". OPERATIONS CHECKED SEVERAL TIMES WITH NO DEFECTS NOTED.