As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER SELECTING GEAR UP A LOUD RUMBLING NOISE HEARD FROM AROUND NOSE GEAR AREA. SOUNDED LIKE A GEAR DOOR DID NOT CLOSE, AIRSPEED LESS THAN 200 KNOTS. REMOVED AND REPLACED NOSE LANDING GEAR PROXIMITY SWITCH. OPERATIONAL CHECKED GOOD. AIRCRAF RETURNED TO SERVICE. (M)