# SDR HALA20251002300

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 1, 2025
- Submitted: October 2, 2025
- Operation: Air carrier
- Aircraft: [N5879K](https://openairdocs.org/aircraft/N5879K), registered now
- Make and model: Airbus A330-343
- Registry model: [Airbus A330-343](https://openairdocs.org/model/airbus-a330-343) (OpenAirDocs)
- Aircraft serial: 01167
- Aircraft time: 34,964 hours, 6,028 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Metering Unit
- Condition: Faulted
- Location: Hyd Sys
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HALA20251002300

## Discrepancy

ETOPS - DURING CRUISE FLT410 HYDRAULIC NOMINAL FILLING RANGE INDICATION MOVING UP AND DOWN. ALSO CHANGING BETWEEN GREEN AND WHITE. POST FLT REPORT SHOWS HSMU 1JG FAULT ON PIN 4. REMOVED + REPLACED HSMU 1JG IAW A330 AMM 29-11-34. OPS CHECK GOOD.

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