As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: EMERGENCY POWER SUPPLY UNIT 10WL DOES NOT PASS BITE TEST. REPLACED EMERGENCY POWER SUPPY UNIT 10WL (AALA202506300032) AND BATTERY (AALA202506300765) PER AMM 33-51-38. A SATISFACTORY OPERATIONAL TEST WAS ACCOMPLISHED.