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. LANDED. LANDING GEAR INDICATED 3 RED, 3 GREEN. ALL GEAR REMAINED DOWN WITH GEAR HANDLE IN THE UP POSITION. THE AIRCRAFT WAS GROUNDED. ACCOMPLISHED A CHECK OF THE LANDING GEAR CONTROL SYSTEM ADJUSTMENT IAW AMM 32-31-00-820-801. GEAR OPS CHECKED GOOD.