What was found
WHEN SWITCHING FROM ENG AIR TO APU, BOTH PACKS PRODUCED SMOKE IN CABIN/COCKPIT. OPERATED BOTH PACKS USING ENG AIR, CLEARED DUCT CONTAMINATION USING AWAC SUPP 09-037A PROCEDURE. AT THIS TIME NO ODOR OR SMOKE IN CABIN USING ENGINE AIR.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
WHEN SWITCHING FROM ENG AIR TO APU, BOTH PACKS PRODUCED SMOKE IN CABIN/COCKPIT. OPERATED BOTH PACKS USING ENG AIR, CLEARED DUCT CONTAMINATION USING AWAC SUPP 09-037A PROCEDURE. AT THIS TIME NO ODOR OR SMOKE IN CABIN USING ENGINE AIR.