# SDR 2012FA0000011

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 21, 2011
- Submitted: January 6, 2012
- Operation: General aviation
- Aircraft: [N26496](https://openairdocs.org/aircraft/N26496), registered now
- Make and model: Cessna 550
- Registry model: [Cessna 550](https://openairdocs.org/model/cessna-550) (OpenAirDocs)
- Aircraft serial: 5500607
- Engine: Pwa JT15D4
- System (JASC): [3242 · Brake](https://openairdocs.org/jasc/3242)
- Part: Stator
- Part number: 1338932
- Condition: Cracked
- Location: Mlg Brake Disk
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2012FA0000011

## Discrepancy

ON LANDING ROLLOUT, LT MAIN GEAR BRAKE LOCKED UP.  UPON DISASSEMBLY AND INSP OF MALFUNCTIONING BRAKE BY MECHANIC, IT WAS DISCOVERED THAT THE STATOR DISK (1 OF THE 2 ON THE BRAKE ASSY) CLOSEST TO THE INBD SIDE HAD CRACKED AND SHATTERED INTO 4 LARGE SEGMENT PIECES.  THE BROKEN PIECES OF THE DISK HAD JAMMED UP AND PREVENTED THE WHEEL FROM TURNING.  SUSPECT FATIGUE OR THERMAL SHOCK COULD BE THE CAUSE OF FAILURE.

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