As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE GEAR DISAGREE WARNING MSG WITH NOSE DOOR. OPEN WARNING WARNING MSG AFTER GEAR RETRACTED. (EMERGENCY DECLARED - ACFT RETURNED TO IAD AFTER T/O) UPON INSP, FOUND NLG PROX SENSOR S23 OUT OF LIMITS. REPOSITIONED S23 IAW AMM 32-61-00 AND SWUNG NLG IAW 32-33-00. OPS CK GOOD, NO DEFECTS NOTED. (CLOSED)