As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE GEAR DID NOT RETRACT AFTER T/O RETURN TO AIRPORT. INSTALLED RIG PIN ON SEQUENCE VALVE AND RIGGED TO ZERO POSITION FOR REMOVED NLG DOOR. DOOR DEACTIVATED IAW CDL. FUNCTIONAL CHECK PERFORMED SATISFACTORY. AIRCRAFT RETURNED TO SERVICE.