# SDR CALA2026041715452

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 16, 2026
- Submitted: April 17, 2026
- Operation: Air carrier
- Aircraft: [N441UA](https://openairdocs.org/aircraft/N441UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 751
- Aircraft time: 83,238 hours, 34,819 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Packing
- Part number: NAS161210A
- Condition: Torn
- Location: Hyd System
- Stage of operation: DE
- 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/CALA2026041715452

## Discrepancy

HYD B RSVR LO LVL INFLIGHT. INDICATED LOSSOF ALL FLUID IN SYS B DEBRIEFED CREW. AT FL 10 FLAPS RETRACTED CREW EXPERIENCED BLUE SYSTEM HYDRAULIC LOSS. CREW SHUT OFF PUMP BY CHECKLIST.AIRCRAFT LANDED WITH VERY LOW BLUE HYDRAULIC SYSTEM. EVIDENCE OF HDR FLUI LEAKING ST PANEL 195BB(BLUE SYSTEM HIGH PRESSURE MANIFOLD. NEEDS FURTHER TROUBLE SHOOTING TO LOCATE LEAK FOLLOWED TSM 29-12-00-810-803-A UP TO AND INCLUDING 4.A.(3)(B). SERVICED BLUE SYS HYD QTY AND RAN BLUE ELEC PUMP. FOUND A STRONG JET/LEAK OF SKYDROL FROM THE BLUE SYS GROUND LEAKAGE MEASUREMENT MANIFOLD (2146GM) PORT A. JET OF SKYDROL HITS THE FUEL PUMP AND DISPERSES AS A FINE MIST OVER EVERYTHING. O-RING BETWEEN UNION AND PORT A APPEARS TO BE CRUSHED OR DEFORMED.  REPLACED ORING ON BLUE SYS GROUND LEAKAGE MEASUREMENT MANIFOLD (2146GM) PORT A, IT WAS FOUND CUT, ALSO REPLACED FILTERS MENTIONED  IN W/U 8570766. OPS AND LEAK CHECK PERFORMED. NO LEAKS NOTED REF AMM 29-19-41-400-002-A, AMM 29-12-43, AMM 29-12-44, 29-22-45.

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