What was found
BATTERY UNIT FAILED SELF TEST AT INSTALLATION. AIRCRAFT WOULD NOT CRANK (BATTERY DISCONNECT). HARD CARD ENCLOSED. REPLACED WITH SERVICEABLE UNIT.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
BATTERY UNIT FAILED SELF TEST AT INSTALLATION. AIRCRAFT WOULD NOT CRANK (BATTERY DISCONNECT). HARD CARD ENCLOSED. REPLACED WITH SERVICEABLE UNIT.