As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THE RIGHT AFT CABIN DOOR SLIDE INDICATION GOES ON & OFF. RED CABIN PRESSURE LIGHT IS FLASHING. MX REMOVED DEBRIS FROM R2 DOOR GIRT BAR AND ACCOMPLISHED SATISFACTORY OPS CHECK OF SLIDE INDICATION. PERFORMED SATISFACTORY OPS CHECK OF CABIN OVERPRESSURE WARNING SYS AMM 52-73-00-710-004-A.