SDR AALA2018060109003

Service difficulty report · Filter · Airbus A321231

Difficulty date: May 29, 2018
Submitted: June 1, 2018
Operation: Air carrier
Aircraft: N138AN
Make and model: Airbus A321231
Aircraft serial: 6650
Aircraft time: 9,927 hours, 3,743 cycles
System (JASC): 4900 · Airborne Auxiliary Power Unit (APU) System
Part: Filter
Condition: Odor
Location: Apu
Stage of operation: NR
How discovered: V
Nature of condition: B
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

ACRID ODOR OF OIL IN THE COCKPIT AND FORWARD CABIN DURING DESCENT. TURNED THE BLOWER OFF, INCREASED THE ODOR IN THE COCKPIT. TURNED OFF THE PACK DISSIPATED THE ODOR GREATLY. AIRCRAFT WAS GROUNDED. REPLACED AUXILLIARY POWER UNIT FILTERS IAW WC 3701. OPS CHECKED NORMAL.

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