As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT NR 5060 (LAX/IYK) PILOT REPORTED AFTER TAKEOFF THAT THE MAIN AND NOSE GEAR WOULD NOT RETRACT. THE AIRCRAFT RETURNED TO THE FIELD. MAINTENANCE FOUND THE EMERGENCY RELEASE PIN POPPED. THEY REMOVED AND REPLACED THE INWARD-OUTWARD VALVE AND PERFORMED A GEAR SWING. THE OPERATIONAL CHECKS WERE GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.