# SDR 2018FA0000432

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 5, 2018
- Submitted: October 23, 2018
- Operation: General aviation
- Aircraft: [N64604](https://openairdocs.org/aircraft/N64604), registered now
- Make and model: Boeing PT-17
- Registry model: [Boeing PT-17](https://openairdocs.org/model/boeing-pt-17) (OpenAirDocs)
- System (JASC): [3242 · Brake](https://openairdocs.org/jasc/3242)
- Part: Plate
- Part number: H12148
- Condition: Cracked
- Location: Mlg Brake
- Component: Brake, Hayes
- Component part number: G2202L
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2018FA0000432

## Discrepancy

MAGNESIUM BRAKE TORQUE PLATE CRACKED AT THE 6 O`CLOCK POSITION AND BROKE ASSOCIATED RETAINING BOLT (ONE OF SIX) IN HALF.  THIS FAILURE RESULTED IN THE LOSS OF THE SPECIFIED  .008/010 DRUM CLEARANCE AND THE BRAKE LOCKED ON LANDING ROLLOUT.  WITH COLLATERAL DAMAGE TO AIRCRAFT.  PROBABLE CAUSE IS FATIGUE FAILURE AND RECOMMEND AN AIRWORTHINESS DIRECTIVE TO REMOVE ALL BRAKE ASSEMBLIES FROM SERVICE REGARDLESS OF CONDITION.

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