# SDR AALA202608140248

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 1, 2026
- Submitted: August 14, 2026
- Operation: Air carrier
- Aircraft: [N420AN](https://openairdocs.org/aircraft/N420AN), registered now
- Make and model: Airbus A321-253NX
- Registry model: [Airbus A321-253NX](https://openairdocs.org/model/airbus-a321-253nx) (OpenAirDocs)
- Aircraft serial: 9584
- Aircraft time: 22,078 hours, 6,041 cycles
- System (JASC): [2697 · Fire Protection System Wiring](https://openairdocs.org/jasc/2697)
- Part: Wire
- Condition: Damaged
- Location: Zone 100
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202608140248

## Discrepancy

AIRCRAFT WAS GROUNDED: AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO LAX DUE TO THE FLIGHT CREW REPORTING THAT SHORTLY AFTER TAKEOFF AN APU FIRE WARNING LIGHT ILLUMINATED. THE FLIGHT CREW ACCOMPLISHED THE PROCPROCEDURE AND LANDED SAFELY AT LAX WITHOUT FURTHER INCIDENT. **SUPPLEMENTAL REPORT FOR AALA202607060248 SUBMITTED 7-6-2026 BY TUL - MAINTENANCE NOTED THAT WHEN SHAKING THE APU WIRE HARNESS THE WARNING LIGHT WOULD EXTINGUISH AND MAINTENANCE FOUND THREE DAMAGED WIRES IN THE HARNESS WHICH WERE REPAIRED - A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO FAULTS NOTED ** (CLOSED)

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