# SDR CALA2025102110351

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 17, 2025
- Submitted: October 21, 2025
- Operation: Air carrier
- Aircraft: [N474UA](https://openairdocs.org/aircraft/N474UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1475
- Aircraft time: 68,803 hours, 29,929 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Packing
- Part number: NAS16128A
- Condition: Damaged
- Location: Hyd System
- Stage of operation: CR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2025102110351

## Discrepancy

HYD B RSVR LO LVL  AT FL200 FOUND LEAK AT BLUE PRESSURE SWITCH 2074GJ, SUSPECT SEAL LEAKING. BLUE SYSTEM PRESSURE SWITCH WAS FOUND LOOSE AND HAD A CUT O-RING. INSTALLED A FRESH SEAL, REINSTALLED THE SWITCH, AND A PRESSURE CHECK CONFIRMS THERE IS NO MORE LEAK. BLUE SYSTEM READY FOR SERVICE.PARTS USED: 40-0595-3-1985,QTY :1

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