# SDR AALA202112204399

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 17, 2021
- Submitted: December 20, 2021
- Operation: Air carrier
- Aircraft: [N135NN](https://openairdocs.org/aircraft/N135NN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6520
- Aircraft time: 20,960 hours, 7,340 cycles
- System (JASC): [2621 · Fire Bottle, Fixed](https://openairdocs.org/jasc/2621)
- Part: Warning Message
- Condition: False Indication
- Location: Apu Fire Bottle
- Stage of operation: NR
- How discovered: 9
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202112204399

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: APU DISCHARGE LIGHT ILLUMINATED. LIGHT WAS NOT ILLUMINATED WHEN MAINTENANCE ARRIVED AT AIRCRAFT. BOTTLE NOT DISCHARGED. ACCOMPLISHED TEST OF APU FIRE LOOP PER AMM 26-27-00 NO FAULTS NOTED.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.