# SDR 20000501SH042

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 18, 2000
- Submitted: May 1, 2000
- Operation: Air carrier
- Make and model: Boeing 737-300
- Registry model: [Boeing 737-300](https://openairdocs.org/model/boeing-737-300) (OpenAirDocs)
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Housing
- Part number: 511531
- Condition: Cracked
- Location: Shuttle Valve
- Component: Hydraulic Shuttle Valve, Pneudraulics
- Component part number: 5059
- Stage of operation: IN
- How discovered: V
- Nature of condition: K
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/20000501SH042

## Discrepancy

HOUSING HAS A  HAIRLINE CRACK ALONG SEAM OF CASTING.  LEAKAGE IS VISIBLE AT MOUNTING HOLES DURING NORMAL OPERATION.  POSSIBLE CAUSE:  WEAK POINT IN CASTING OF HOUSING.  NOTED TO BE A RECURRING PROBLEM/DEFECT IN THE CASTING SEAM OF THESE HOUSINGS.  SUBMITTER SUGGESTED ADDING REQUIREMENT FOR NDI OF THE HOUSING IN THE OHM. (X)

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