# SDR SB05075

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 28, 2005
- Submitted: June 30, 2005
- Operation: Air carrier
- Aircraft: N393US
- Make and model: Boeing 737-3B7
- Registry model: [Boeing 737-3B7](https://openairdocs.org/model/boeing-737-3b7) (OpenAirDocs)
- Aircraft serial: 23315
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Shutoff Valve
- Part number: 65449913
- Condition: Leaking
- Location: Hyd System
- Stage of operation: CL
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SB05075

## Discrepancy

PHL   FLT 1085 AFTER TAKEOFF AND GEAR RETRACTION, CREW REPORTED A SUBSTANTIAL DROP IN THE A-HYDRAULIC SYSTEM QUANTITY.  FLIGHT RETURNED TO FIELD AT PHL AND LANDED WITHOUT FURTHER INCIDENT.  NO EMERGENCY WAS DECLARED.  MAINTENANCE FOUND THE FLIGHT CONTROL SHUTOFF VALVE MANIFOLD LEAKING NEAR THE A-SYSTEM INLET LINE.  REPLACED FLIGHT CONTROL SHUTOFF VALVE ASSEMBLY.  LEAK CHECK GOOD.  ALSO, REPLACED A-HYDRAULIC SYSTEM QUANTITY INDICATOR.  OPERATIONAL CHECK GOOD.

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