As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR FAILED TO RETRACT AFTER TAKE OFF. FLIGHT CREW DECLARED EMERGENCY AND RETURNED TO FAR. MAINTENANCE INTERROGATED THE PSEU PER MM32-61-00-742-801 AND FOUND NOSE CENTER UNREASONABLE FAR INDICATION. CENTERED NOSE WHEEL AND VISUALLY VERIFIED CENTERED. PSEU SHOWS NOSE CENTER OK. PERFORMED A GVI OF NOSE GEAR, CLEANED AND LUBED NOSE CENTERING CAM AND SPRING. OPERATED ENGINES AND CENTERED NOSE WHEEL AND VISUALLY VERIFIED CENTERED. AIRCRAFT WAS RETURNED TO SERVICE.