As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN DOOR: UPON CLOSING MAIN CABIN DOOR THE MIDDLE TOP AND BOTTOM RED SIXPACK LIGHTS REMAINED ON. WAS ABLE TO EXTINGUISH BOTTOM MIDDLE W VENT DOOR KNOB, BUT TOP REMAINED ILLUMINATED. TRIED THE DOOR MULTIPLE TIMES WITH AND WITHOUT APU AIR ON, AND UNABLE TO SECURE DOOR.//CORRECTIVE ACTION// CLEANED MATING SURFACES AND BONDED LOCKPIN OF MICROSWITCH. OP'S CHECK GOOD.