What was found
CABIN FILLS WITH SMOKE WHEN CABIN PACK IS ON. COCKPIT PACK OK. MAINTENANCE PLACED CABIN PACK ON MEL. MEL CLEARED BY OPERATING APU FOR 4 HOURS WITH APU ON, NO SMOKE NOTED. MEL CLEARED. NO PARTS REPLACED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
CABIN FILLS WITH SMOKE WHEN CABIN PACK IS ON. COCKPIT PACK OK. MAINTENANCE PLACED CABIN PACK ON MEL. MEL CLEARED BY OPERATING APU FOR 4 HOURS WITH APU ON, NO SMOKE NOTED. MEL CLEARED. NO PARTS REPLACED.