As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEAR WOULD NOT RETRACT WHEN THE HANDLE WAS PLACED IN UP POSITION. EMER DECLARED FLIGHT RETURNED & LANDED WITHOUT INCIDENT. ACFT REMOVED FROM SERVICE. ACCOMPLISHED SEVERAL CYCLES OF LG EXTENSION & RETRACTION WITH NO FAULTS NOTED. SYS GND CHECKED NORMAL, OPERATION CLOSED.