# SDR AALA981426

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 22, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N1445B
- Make and model: Fokker F.28 MK 0100
- Registry model: [Fokker F.28 MK 0100](https://openairdocs.org/model/fokker-f-28-mk-0100) (OpenAirDocs)
- Aircraft serial: 11448
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: O-Ring
- Part number: NAS16128
- Condition: Failed
- Location: Hydraulic System
- Stage of operation: CR
- Nature of condition: J, K
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA981426

## Discrepancy

DFW - FLT T0455 - DURING CRUISE, NR 1 HYDRAULIC LOW LIGHT ILLUMINATED ON MFDU.  CREW TURNED OFF NR 1 HYDRAULIC SYSTEM AND FOLLOWED PROCEDURES FOR ALTERNATE FLAP AND GEAR EXTENSION.  AIRCRAFT LANDED DFW WITHOUT FURTHER INCIDENT AND WAS TOWED TO THE GATE.  MAINTENANCE FOUND O-RING IN SAMPLING VALVE LEAKING.  REPLACED O-RING IN SAMPLING VALVE AND SERVICED NR 1 HYDRAULIC SYSTEM.  SYSTEM GROUND AND LEAKED CHECKED, NORMAL OPERATION.  (X)

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