What was found
AUXILIARY POWER UNIT DISAGREE ALERT ON START ATTEMPT AND LOW AIR PRESSURE INDICATED. REMOVED AND REPLACED AUXILIARY POWER UNIT BLEED AIR VAVLE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AUXILIARY POWER UNIT DISAGREE ALERT ON START ATTEMPT AND LOW AIR PRESSURE INDICATED. REMOVED AND REPLACED AUXILIARY POWER UNIT BLEED AIR VAVLE.