As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF. AN L1 DOOR ALERT MESSAGE ILLUMINATED FOR SEVERAL MINUTES, THEN WENT OUT, NO ABNORMAL SYMPTOMS NOTICED. L1 DOOR MECHANISM AND DOOR WARNING SWITCH INSPECTED, NO FAULTS FOUNDED, CLEANED AND REMOVED DEBRIS AROUND THE DOOR WARNING SWITCH AREA IAW AMM 52-71.