As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEAR WILL NOT RETRACT WITH HANDLE IN UP POSTION. THREE GREEN AND THREE RED LIGHT WITH HANDLE UP. ATTEMPTED TWICE, HANDLE FELT NORMAL. EMERGENCY DECLARED. REPLACED GEAR SELECTOR VALVE IAW MM 32-31-51. SWUNG GEAR IAW MM 07-11-01. ALL CHECKED NORMAL