What was found
AIRCRAFT WAS GROUNDED: MID CABIN LEFT EMERGENCY POWER SUPPLY UNIT BATTERY INOPERATIVE. REPLACED BATTERY PER AMM 33-51-38. ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT WAS GROUNDED: MID CABIN LEFT EMERGENCY POWER SUPPLY UNIT BATTERY INOPERATIVE. REPLACED BATTERY PER AMM 33-51-38. ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK.