As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, LANDING GEAR WOULD NOT RETRACT. DECLARED AN EMERGENCY AND RETURNED TO FIELD CUR WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND MANUAL EXTENSION SYSTEM ACCESS DOOR SWITCH OUT OF ADJUSTMENT. REMOVED SWITCH, CLEANED AND REINSTALLED SWITCH IAW AMM 32-34-00. SWITCH OPERATIONS CHECK NORMAL.