# SDR P5CA9700507

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 21, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N858FT](https://openairdocs.org/aircraft/N858FT), registered now
- Make and model: Boeing 747123
- Aircraft serial: 20109
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Union
- Part number: MS219J16
- Condition: Distorted
- Location: Nr 4 Pylon
- Stage of operation: CR
- Nature of condition: K, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/P5CA9700507

## Discrepancy

NR 4 HYDRAULIC SYSTEM WENT FROM 8.5 GALLONS TO 2.5 GALLONS, AS PER ALTERNATE PROCEDURES DEPRESSURIZED EDP AND ADP QUANTITY STABILIZED AT 2.5 GALLONS.  RETURNED TO MIA.  FOUND NR 4 EDP PRESSURE LINE BULKHEAD FITTING AT VERTICAL FIREWALL DISTORTED.  REMOVED AND REPLACED FITTING PER BOEING MAINTENANCE MANUAL 20-11-05.  LEAK CHECK OK AT 3,000 PSI.

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