As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA-ON FLIGHT NUMBER 9801, AFTER ENGINE START, NOSE GEAR DOORS OPENED FOR 5 SECONDS AND THEN CLOSED ON THEIR OWN. NOSE GEAR UNSAFE LIGHT ILLUMINATED. FOUND NOSE GEAR DOWN 1 PROX SENSOR TOO FAR. ADJUSTED PROX SENSOR TO PROPER INDUCTANCE VALUE. GROUND RAN AIRCRAFT, MOVED NOSE WHEEL STEERING FRON SIDE TO SIDE. GEAR DOORS DID NOT OPEN. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.