As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(PIREP) LANDING GEAR FAILED TO RETRACT AFTER TAKEOFF. PERFORMED ALT GEAR EXT PROCEDURE, OVERHEAD DOOR WAS FOUND OPEN. (MX) CONSULTED W/FLT CREW AND DETERMINED FAILURE TO RETRACT DUE TO OPEN EMERGENCY MLG RELEASE DOOR. PERFORMED EXPANDED PSEU BITE DIAGNOSTIC TEST AND RECOVERED CORROBATIVE FAULT CODES IAW DHC MM 32-61-50 PG 202-204 PARA 2A. NO FURTHER DEFECTS NOTED.