As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBOUT GTR GEAR UNSAFE LIGHT UPON GEAR RETRACTION. CREW PERFORMED PROCEDURES PER MANUAL. LANDING UNEVENTFUL IN GTR. AIRCRAFT MOVED TO ADS UNDER FAA SPECIAL FLIGHT PERMIT FOR REPAIR. MAINTENANCE FOUND FAULTY SWITCH IN NOSE GEAR UP LOCK. REPLACED FAULTY SWITCH IN UP LOCK ASSY. NO FURTHER ACTION REQUIRED.