What was found
DCA - THE MID CABIN, RIGHT SIDE EMERGENCY POWER SUPPLY UNIT FAILED THE OPERATIONAL TEST. MAINTENANCE REPLACED THE MID CABIN, RIGHT SIDE EMERGENCY POWER SUPPLY UNIT. OPERATIONALLY CHECKS OK.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DCA - THE MID CABIN, RIGHT SIDE EMERGENCY POWER SUPPLY UNIT FAILED THE OPERATIONAL TEST. MAINTENANCE REPLACED THE MID CABIN, RIGHT SIDE EMERGENCY POWER SUPPLY UNIT. OPERATIONALLY CHECKS OK.