As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: WHILE PERFORMING OPERATIONAL TEST OF EMERGENCY POWER SUPPLY UNITS, MAINTENANCE FOUND CIDS1 SHOWS CLASS 1 FAULT FOR "ESCAPE SLIDE LT SW/ ESPU(12WL) EMER R". MAINTENANCE FOUND PROXIMITY SWITCH DIRTY, CLEANED PROXIMITY SWITCH AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK WITH NO FAULTS NOTED.