As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHT BATTERY PACKS M1673 AND M1675 FAIL CAPACITY CHECK PER T/C 78233001. GROUNDED - YES. REMOVED, REPLACED, AND TESTED M1673 AND M1675 BATTERY PACKS PER MM 33-51-06-960-805- OPS NORMAL. FOUR MIG-51A TAGS INSTALLED AND REMOVED.