# SDR AALA201709279009

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 24, 2017
- Submitted: September 27, 2017
- Operation: Air carrier
- Aircraft: [N509AY](https://openairdocs.org/aircraft/N509AY), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 3796
- Aircraft time: 31,454 hours, 11,088 cycles
- System (JASC): [5240 · Service Doors](https://openairdocs.org/jasc/5240)
- Part: Deu
- Part number: Z043H000351A
- Part serial: 043H00025519
- Condition: Faulted
- Location: R4 Door
- Part time: 12,442 hours, 3,650 cycles
- Stage of operation: TX
- 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/AALA201709279009

## Discrepancy

CIDS PANNEL INDICATES THE R4 DOOR BOTTLE HAD LOW PRESSURE.  CONFIRMED THE DOOR ASSIST BOTTLE PRESSURE WAS IN THE GREEN ARC. TROUBLESHOT AND FOUND A BAD DECODER UNIT. REPLACED DEU IAW AMM.

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