What was found
AFTER RT ENG START AIRCRAFT LOST POWER ON BUSS APPEARED TO BE RT BUSS. NUMEROUS FAULTS DISPLAYED AIRCRAFT RETURNED TO GATE. SWAPPED RT & APU GCU'S ACCOMPLISHED ENG RUNS & ALL CHECKED OK NO FAULTS NOTED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AFTER RT ENG START AIRCRAFT LOST POWER ON BUSS APPEARED TO BE RT BUSS. NUMEROUS FAULTS DISPLAYED AIRCRAFT RETURNED TO GATE. SWAPPED RT & APU GCU'S ACCOMPLISHED ENG RUNS & ALL CHECKED OK NO FAULTS NOTED.