As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GNDED. AIR INTERRUPT, EMER WAS DECLARED, LANDING UNEVENTFUL & ACFT NOT OVERWEIGHT. DURING CLIMB LG WOULD NOT RETRACT. PERFORMED FIM 32-30 TASK 815 & FOUND MANUAL EXTENSION DOOR OPEN. VERIFIED ASSOCIATED DOOR SWITCH WAS OPERATIONAL. VERIFIED THAT FLIGHT CREW FOUND DOOR OPEN IN FLIGHT. DOOR CLOSED, NO FAULTS FOUND.