# SDR AALA2020031219003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 9, 2020
- Submitted: March 12, 2020
- Operation: Air carrier
- Aircraft: [N540UW](https://openairdocs.org/aircraft/N540UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 4107
- Aircraft time: 34,156 hours, 13,371 cycles
- System (JASC): [5210 · Passenger/Crew Doors](https://openairdocs.org/jasc/5210)
- Part: Valve
- Part number: MS288892
- Condition: Faulty
- Location: L4 Door
- Component: Assist Bottle, Ratier
- Component part number: FE240007
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA2020031219003

## Discrepancy

AIRCRAFT GROUNDED - L4 DOOR DOES NOT SHOW ARMED ON CIDS PANEL, DID SHOW ARMED ON LOWER ECAM. FOUND DOOR ASSIST BOTTLE HAD LOW PRESSURE, DUE TO BAD FILLING VALVE. REPLACED FILLING VALVE AND O-RING PER AMM 52-10-00. SERVICED L4 DOOR ASSIST BOTTLE PER JOB CARD 26L80052001.

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