What was found
FLIGHT 5313 - RECEIVED GEAR DISAGREE MESSAGE. NOSE GEAR DID NOT RETRACT. PERFORMED QRH, DECLARED EMERGENCY, RETURNED TO IAD. REPLACED NLG SELECTOR VALVE. NO FURTHER DEFECTS.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FLIGHT 5313 - RECEIVED GEAR DISAGREE MESSAGE. NOSE GEAR DID NOT RETRACT. PERFORMED QRH, DECLARED EMERGENCY, RETURNED TO IAD. REPLACED NLG SELECTOR VALVE. NO FURTHER DEFECTS.