SDR AALA201907319016

Service difficulty report · O-Ring · Airbus A321231

Difficulty date: July 29, 2019
Submitted: July 31, 2019
Operation: Air carrier
Aircraft: N509AY
Make and model: Airbus A321231
Aircraft serial: 3796
Aircraft time: 37,844 hours, 13,480 cycles
System (JASC): 4990 · APU Oil System
Part: O-Ring
Condition: Damaged
Location: Apu
Stage of operation: TX
How discovered: O
Nature of condition: K, B
Precautionary procedure: K

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

What was found

AIRCRAFT WAS GROUNDED: PILOT REPORTS WHEN APU AIR WAS TURNED ON, SMOKE FILLED THE FLT DECK AND CABIN. EVIDENCE OF OIL DRIPPING FROM APU. MAINTENANCE FOUND OIL LEAKING FROM THE APU OIL FILTER HOUSING. REMOVED AND REPLACED APU OIL FILTER O-RING, COMPLIED WITH JOB CARDS 26L00021002, 26L00021001, AND 26L00021004. NO FURTHER ODORS NOTED.

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