As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: REMOVED AND REPLACED AFT LEFT HAND POWER SUPPLY. PER AMM 33-51-06. REPLACEMENT DID NOT RESOLVE THE ISSUE. FURTHER TROUBLESHOOTING REQUIRED. REMOVED AND REPLACED AFT GALLEY LEFT HAND OVERHEAD EMERGENCY BATTERY ASSEMBLY. PER AMM 33-51-06. OPERATIONAL CHECKS GOOD.