# SDR SWAA2025041725866

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 15, 2025
- Submitted: April 17, 2025
- Operation: Air carrier
- Aircraft: [N8682B](https://openairdocs.org/aircraft/N8682B), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 36651
- Aircraft time: 30,286 hours, 14,932 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: O-Ring
- Condition: Leaking
- Location: Zone 100
- Stage of operation: DE
- How discovered: C
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2025041725866

## Discrepancy

LOSS OF HYD SYSTEM B LEAK WAS FROM B SYS MODULE PRESSURE SWITCH BASE. SEE PIC IN ATTACHMENTS. REF LP 2794629 <[01] CW; [02] R/R B SYSTEM MODULE PRESSURE SWITCH ADAPTER O RINGS IAW AMM 29-11-00 OPS AND LEAK CHECK GOOD.

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