# SDR CALA2022111403135

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 14, 2022
- Submitted: November 16, 2022
- Operation: Air carrier
- Aircraft: N412UA
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 465
- Aircraft time: 90,286 hours, 34,670 cycles
- System (JASC): [2930 · Hydraulic Indicating System](https://openairdocs.org/jasc/2930)
- Part: Reservoir
- Condition: Low
- Location: Hyd System
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2022111403135

## Discrepancy

ECAM CAUTION MESSAGE - Y RSVR LO LVL MESSAGE INOP - HYD OCCURED IN CRUISE.QUANTITY NORMAL AND BRAKEACCUMULATER LEVEL DID NOT DECREASE. PER POST FLIGHT REPORT AFS1 MESSAGE HYDRAULIC YELLOW 3151 GN - SYSTEM PRESSURE SWITCH FAULT. REMOVED AND REPLACED 3151 PRESSURE SWITCH REF AMM 29-32-12-400-003-A. OPERATED YELLOW SYSTEM NO MESSAGE OPS CHECKS GOOD.

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