What was found
USING APU BLEEDS, SMOKE ENTERED THE CABIN. SMOKE WENT AWAY WHEN BOTH PACKS WERE TURNED OFF. REMOVED AND REPLACED APU BLEED SWITCH. OPS CHECKS GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
USING APU BLEEDS, SMOKE ENTERED THE CABIN. SMOKE WENT AWAY WHEN BOTH PACKS WERE TURNED OFF. REMOVED AND REPLACED APU BLEED SWITCH. OPS CHECKS GOOD.