# SDR AALA2020072089065

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 17, 2020
- Submitted: July 20, 2020
- Operation: Air carrier
- Aircraft: [N573UW](https://openairdocs.org/aircraft/N573UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 5939
- Aircraft time: 21,787 hours, 8,450 cycles
- System (JASC): [2621 · Fire Bottle, Fixed](https://openairdocs.org/jasc/2621)
- Part: Warning Message
- Condition: False Indication
- Location: Apu Extinguisher
- Stage of operation: CR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA2020072089065

## Discrepancy

AIRCRAFT NOT GROUNDED,  DISCHARGE LIGHT ILLUMINATED ON APU PANEL IN FLIGHT.   LIGHT EXTINGUISHED ABOUT 10 MINUTES LATER.  TROUBLESHOT IAW TSM TASK 26-22-00-810-806-A,  VERIFIED RED DISK IS PRESENT AND APU COMPARTMENT IS CLEAN,  NO DISCHARGE AGENT.  ACCOMPLISHED PRESSURE CHECK IAW AMM 26-22-41, AND BOTTLE WEIGHT CHECK, ALL CHECKED OKAY, NO FAULTS DETECTED IAW TSM TASK 26-22-00-810-806-A.

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