As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FAULT EICAS MSG DISPLAYED WHEN ATTEMPTING APU START AFTER LANDING. PERFORMED QRH PROCEDURE, APU FAULT REILLUMINATED APU WOULD NOT START. PERFORMED BITE TEST OF ECU BOX FOUND NO FAULTS AT THIS TIME. PERFORMED 4 SUCCESSFUL APU STARTS WITH NO PROBLEMS IAW AMM 49-11-00 FAULT TREE 815. OPS CHECK GOOD.