As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT 1070, THE CABIN DOOR ANNUNCIATOR ILLUMINATED AT 2 POUNDS OF DIFFERENTIAL PRESSURE. THE CREW DID AN AIR TURNBACK. THE SYSTEM WAS PUT ON MEL AND THE AIRCRAFT RETURNED TO SERVICE. ON 06/09 MECHANIC CLEARED THE MEL BY ADJUSTING THE LOWER SILL SWITCH. THE AIRCRAFT WAS RETURNED TO SERVICE WITH NO FURTHER DEFECTS.