# SDR CALA2026052016420

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 17, 2026
- Submitted: May 20, 2026
- Operation: Air carrier
- Aircraft: [N472UA](https://openairdocs.org/aircraft/N472UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1435
- Aircraft time: 75,192 hours, 31,898 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Pressure Switch
- Part number: 4501310000
- Part serial: 4955
- Condition: Faulted
- Location: Hyd System
- Part time: 75,178 hours, 31,892 cycles
- Stage of operation: CL
- 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/CALA2026052016420

## Discrepancy

HYD G ENG 1 PUMP LO PR PREVIOUS HISTORY LOG PAGE 8914306, SEE TSM 29-11-00-810-804-A INSPECTED ENGINE AND WHEEL WELL AND FOUND NO LEAKS. GREEN SYSTEM WAS FOUND LOW. SERVICED GREEN SYSTEM REF. AMM 12-12-29-611-001-A. RAN ENGINE #1 FOLLOWING TSM 29-11-00-810-804-A. GREEN ENGINE PRESSURE WAS NORMAL AT 3000PSI BUT STILL INDICATING LOW PRESSURE. R & R ENGINE DRIVEN PRESSURE SWITCH IAW AMM 29-11-17-000-010-A AND AMM 29-11-17-400-010-A, STEPS 1, THRU 4B. STEP 4C.   PERFORMED DRY MOTOR OF NR 1 ENG IAW AMM 29-11-17-400-010-A STEP 4C. GREEN HYD PRESSURE IS GOOD. LEAK CHKD GOOD. NO LOW PRESSURE FAULT ON EICAS. NO FURTHER DEFECTS.

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