As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6547 - IAD TO LYH - DURING CLIMB-OUT RETURNED TO IAD DUE TO THE RT MAIN INTRANSIT LIGHT WOULD NOT EXTINGUISH AFTER GEAR WAS RETRACTED. AIRCRAFT RETURNED TO IAD WITH NO FURTHER INCIDENTS. MAINTENANCE FOUND GEAR ICED UP. MAINTENANCE DE-ICED LANDING GEAR AND AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (Z)