As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON POWER TRANSFER EICAS MESSAGE CARGO FIRE DETECTOR SHOWS ON EICAS AND RECEIVE ALERTS. COMPLIED WITH BITE TEST CHECK OF CARGO FIRE DETECTION SYSTEM AFTER POWER TRANSFER. ALL MESSAGES WENT AWAY NO FAULTS NOTED. SUSPECTED BAD HAND POWER CART ALL SYSTEM NORMAL.