As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR WOULD NOT RETRACT. UPON SELECTING THE GEAR HANDLE TO UP GEAR RETRACTION COMMENCED BUT PILOTS DID NOT HEAR THE NORMAL SOUND OF THE GEAR HITTING AND LOCKING ON THE UPLOCKS. THE RED UNLOCK LIGHT REMAINED ILLUMINATED. REMOVED AND REPLACED NOSE LANDING GEAR UPLOCK ACTUATOR AND UPLOCK SWITCH PERFORMED FUNCTIONAL CHECK, AND SERVICED HYDRAULICS. NO DEFECTS NOTED AT THIS TIME. MAINTENANCE PERFORMED IAW AMM 32-30-05 AND 12-12-01 AND 32-01-00.