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