# SDR SWIA2026082176954

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 21, 2026
- Submitted: August 25, 2026
- Operation: Air carrier
- Aircraft: [N503SY](https://openairdocs.org/aircraft/N503SY), registered now
- Make and model: Emb ERJ 170-200 LR
- Registry model: [EMB ERJ 170-200 LR](https://openairdocs.org/model/embraer-s-a-erj-170-200-lr) (OpenAirDocs)
- Aircraft serial: 17000884
- Aircraft time: 13,016 hours, 7,416 cycles
- System (JASC): [2930 · Hydraulic Indicating System](https://openairdocs.org/jasc/2930)
- Part: Valve
- Condition: Faulted
- Location: Hyd Sys
- 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/SWIA2026082176954

## Discrepancy

WHILE IN CRUISE, HYDRAULIC QUANTITY ON SYSTEM 3 WENT FROM 18% WHEN NOTICED TO 0%. LATER LOST ALL HYD 3 PRESSURE. ELEC PUMPS A AND B WERE TURNED OFF WHEN DIRECTED BY THE QRH.   (FLIGHT 6401)  FOUND OUTLET PRESSURE UNION ON HYD NR 3 FLOW LIMITER VALVE LEAKING. REMOVED AND REPLACED BOTH HYD NR 3  FLOW LIMITER VALVES PRESSURE AND OUTPUT UNION O-RINGS WITH SERVICEABLE UNITS. SERVICED AND OPERATED HYD. #3 SYSTEM FOR SEVERAL MINUTES. ALL INDICATIONS NORMAL AND NO LEAKS NOTED. AFTER OPERATING WE INSPECTED HYD#3 FILTER DPI'S. NO DEFECTS NOTED. ACFT OK FOR SERVICE. REF AMM. 29-12-19

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