# SDR SWAA2025071090044

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 10, 2025
- Submitted: July 10, 2025
- Operation: Air carrier
- Aircraft: [N458WN](https://openairdocs.org/aircraft/N458WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33857
- Aircraft time: 70,804 hours, 42,423 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Filter
- Condition: Faulted
- Location: Zone 100
- Stage of operation: CR
- How discovered: O
- Nature of condition: M, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2025071090044

## Discrepancy

B HYD OVERHEAT AT CRUISE. FL340. ELECTRIC PUMP. ALT FLAP EXT & LANDED FLAPS 15. NO BRAKE OVHT.  T/S PER FIM 29-30 TASK 806 FOUND HYD SYS B OVERHEAT SWITCH AND CONNECTOR SHORTED. REMOVED AND REPLACED SYS B OVERHEAT SWITCH PER AMM 29-32-12. REMOVED AND REPLACED OVERHEAT SWITCH CONNECTOR PER SWPM 20-61-19.  REMOVED AND REPLACED HYD SYS B CASE DRAIN FILTER PER AMM 29-11-41 NO ABNORMALITIES NOTED IN FILTER OPS/LEAK CKS OK.  RETURNED FLT DECK SWITCHES TO ORIGINAL CONFIG.

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