As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ASH FLT 7134 IAD-GSP. GEAR DISAGREE MESSAGE WITH NOSE DOOR OPEN MESSAGE ON EXTENSION. CYCLED AGAIN SEVERAL TIMES WITH NO NLG EXTENSION. MANUALLY EXTENDED THE NLG GEAR AND GOT 3 GREEN INDICATIONS, DECLARED AND EMERGENCY AND LANDED SAFELY. MX R2 THE NOSE GEAR SELECTOR VALVE, OPS NORMAL.