What was found
DURING MAINTENANCE ON A/C, EMERGENCY BATTERY PACKS 20LN AND 21LN FAILED TEST. MAINTENANCE REPLACED BOTH BATTERIES, AND TESTS GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING MAINTENANCE ON A/C, EMERGENCY BATTERY PACKS 20LN AND 21LN FAILED TEST. MAINTENANCE REPLACED BOTH BATTERIES, AND TESTS GOOD.