What was found
WHILE OPERATING ON THE GROUND, APU MADE A LOUD BANG AND SHUT DOWN. APU TROUBLESHOT TO UNCONTAINED TURBINE FAILURE. REPLACED AUXILIARY POWER UNIT. (M)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
WHILE OPERATING ON THE GROUND, APU MADE A LOUD BANG AND SHUT DOWN. APU TROUBLESHOT TO UNCONTAINED TURBINE FAILURE. REPLACED AUXILIARY POWER UNIT. (M)