What was found
WHILE RUNNING APU WITH THE BLEED AIR OFF, DURING HEAVY RAIN THE CABIN FILLED WITH SMOKE WITH THE ODOR OF OIL. FOUND THE COALESCER SOCK DIRTY. REMOVED AND REPLACED THE COALESCER SOCK.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
WHILE RUNNING APU WITH THE BLEED AIR OFF, DURING HEAVY RAIN THE CABIN FILLED WITH SMOKE WITH THE ODOR OF OIL. FOUND THE COALESCER SOCK DIRTY. REMOVED AND REPLACED THE COALESCER SOCK.