# SDR DXTA2021071245140

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 11, 2021
- Submitted: July 14, 2021
- Operation: Air carrier
- Aircraft: [N577QS](https://openairdocs.org/aircraft/N577QS), registered now
- Make and model: Cessna 560XL
- Registry model: [Cessna 560XL](https://openairdocs.org/model/cessna-560xl) (OpenAirDocs)
- Aircraft serial: 5605735
- Aircraft time: 11,824 hours, 8,975 cycles
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: Motor
- Part number: MP50B1
- Part serial: 387
- Condition: Defective
- Location: Hyd Pump
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2021071245140

## Discrepancy

BRAKE PRESSURE LIGHT: LOW BRAKE PRESS AND ANTI SKID ANNUNCIATORS ILLUMINATED ON THE TAXIWAY. ALL CBS ARE IN. WE WERE TOWED BACK TO FBO. // SIGNOFF // REMOVED AND REPLACED POWER BRAKE MOTOR PN MP50B-1 SN 2996 AND INSTALLED CUSTOMER SUPPLIED OVERHAULED UNIT PN MP50B-1 SN 387. ALSO REPLACED HYDRAULIC PUMP ASSY PN 9912166-3 SN 7199 AND INSTALLED CUSTOMER SUPPLIED NEW UNIT PN 9912166-3 SN 10BU54. BLEED BRAKES AS REQUIRED, OPS AND LEAK CHECK GOOD WITH NO DEFECTS NOTED. REF CE560XL MM 32-44-20.

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