What was found
WHILE RUNNING APU WITH NO PAX, MX NOTICED BLUE OILY SMOKE IN CABIN. MX OPERATED BOTH PACKS USING ENGINE AIR, DEFFERED APU.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
WHILE RUNNING APU WITH NO PAX, MX NOTICED BLUE OILY SMOKE IN CABIN. MX OPERATED BOTH PACKS USING ENGINE AIR, DEFFERED APU.