What was found
AIRCRAFT WAS GROUNDED: FLIGHT RETURNED TO DEN ON ACCOUNT OF APU SHUTDOWN WITH 1 GENERATOR ON PLACARD. EMERGENCY WAS DECLARED. MAINTENANCE REPLACED OIL LUBE MODULE IAW AMM 49-91-45, LEAK CHECK AND OPS CHECK NORMAL.
- Difficulty date
- September 18, 2019
- Submitted
- September 19, 2019
- Operation
- Air carrier
- Aircraft
- N165US
- Make and model
- Airbus A321211
- Aircraft serial
- 1431
- Aircraft time
- 62,043 hours, 23,372 cycles
- System (JASC)
- 4990 · APU Oil System
- Part
- Lubrication Unit
- Part number
- 41310204
- Condition
- Low Pressure
- Location
- Apu
- Stage of operation
- CL
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.