What was found
THIS AC WAS IN SCHEDULDED MAINTENANCE FOR THIS EVENT. DURING HEAVY CHECK EPSU UNIT 17WL FAULTING UNIT FAULT. REMOVED AND REPLACED EPSU 17WL REF AMM 33-51-38-000-001-A AND AMM 33-51-38-400-001-A. OPS CHECK GOOD. A/C OK FOR SERVICE.
- Difficulty date
- November 3, 2025
- Submitted
- November 3, 2025
- Operation
- Air carrier
- Aircraft
- N638FR
- Make and model
- Airbus A321271NX
- Aircraft serial
- 11749
- Aircraft time
- 4,991 hours, 2,340 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Power Supply
- Part number
- 32146210
- Part serial
- 184537
- Condition
- Faulted
- Location
- Zone 200
- Stage of operation
- IN
- How discovered
- C
- Nature of condition
- L
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.