What was found
APU FAULT ON TAXI IN, TRIED TO START 3 TIMES.(<P>PERFORMED SELF AND BITE CHECK OF THE ECU IAW AMM B767 49-61-05, NO FAULTS FOUND. ABORTED START MESSAGE, APU STARTED ON FOURTH ATTEMPT. OPS CHECK GOOD AT THIS TIME (1ST ATTEMPT BY MX). BATTERY RECOVERED FROM EARLIER CREW ATTEMPTS. APU OPERATION NORMAL, BATTERY SHOWED 28 VOLTS AND 3 AMPS CHARGING.</P>)