# SDR 2019FA0000051

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 25, 2019
- Submitted: March 4, 2019
- Operation: General aviation
- Aircraft: HK464
- Make and model: Cessna 172S
- Registry model: [Cessna 172S](https://openairdocs.org/model/cessna-172s) (OpenAirDocs)
- Aircraft serial: 9942
- Aircraft time: 9,444 hours
- System (JASC): [3243 · Master Cylinder/Brake Valve](https://openairdocs.org/jasc/3243)
- Part: Piston
- Part number: 98820125
- Condition: Broken
- Location: Master Cylinder
- Part time: 9,393 hours
- Component: Master Cylinder, Cessna
- Component part number: 98820107
- Stage of operation: LD
- How discovered: C
- Nature of condition: O
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2019FA0000051

## Discrepancy

AFTER A TOUCH AND TAKE OFF, THE PILOT REPORTED BRAKE MALFUNCTION, THE PISTON AT THE MASTER CYLINDER WAS FOUND BROKEN. PART REPLACED.

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