As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE EMERGENCY LIGHTS BATTERY PACKS TESTS, FOUND M5168 AND M5169 POWER SUPPLY BATTERY PACKS FAILED TO TEST.(<P>02 EA EMERGENCY BATTERY PACK ASSY M5168 AND M5169 WERE REPLACED, AND OPS TEST WAS COMPLETED PER AMM 33-51-04-902-001-001 REV 117. OPS TEST WAS SATISFACTORY. NO FURTHER DEFECTS NOTED.</P>)