# SDR SWAA2022071127699

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 10, 2022
- Submitted: July 11, 2022
- Operation: Air carrier
- Aircraft: [N945WN](https://openairdocs.org/aircraft/N945WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36660
- Aircraft time: 40,215 hours, 24,428 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Filter
- Part number: 840002074
- Part serial: BN249072
- Condition: Faulty
- Location: Cabin
- Stage of operation: AP
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2022071127699

## Discrepancy

TOTAL AND IMMEDIATE LOSS OF HYDRAULIC B SYSTEM FLUID FOLLOWING INITIAL FLAP SELECTION ON APPROACH. / [01] FOUND FLOW LIMITER ASSEMBLY MODULE LEAKING. REMOVED AND REPLACED I/A/W AMM 29-00-00 REMOVED AND REPLACED EDP CASE DRAIN FILTER I/A/W AMM 29-11-51 REMOVED AND REPLACED EMDP CASE DRAIN FILTER I/A/W AMM 29-11-41 REMOVED AND REPLACED RETURN FILTER I/A/W AMM 29-11-61 REMOVED AND REPLACED MODULE FILTER I/A/W AMM 29-11-71 SERVICED B HYDRAULIC RESERVOIR I/A/W AMM 12-12-00 LEAK AND OPS CHECK GOOD

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