As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF FROM, THE NOSE GEAR WOULD NOT RETRACT. QRH PROCEDURES WERE COMPLIED WITH AND AN EMERGENCY WAS DECLARED. THE AIRCRAFT RETURNED, LANDING SAFELY. MAINTENANCE DISCOVERED THE NOSE GEAR S23 PROXIMITY SENSOR HITTING THE TARGET AND ADJUSTED THE SENSOR. MAINTENANCE ALSO PERFORMED FOUR GEAR SWINGS. OPERATIONAL CHECKS GOOD. AIRCRAFT OK FOR SERVICE. (M)