# SDR CA990915006

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 31, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Make and model: Dhav DHC8102
- Engine: Pwa PW120A
- Propeller: Hamstd 14SF7
- System (JASC): [3242 · Brake](https://openairdocs.org/jasc/3242)
- Part: O-Ring
- Part number: 681895
- Condition: Deteriorated
- Location: Brake
- Part time: 13,447 hours
- Component: Bfgoodrich, 214664
- Stage of operation: IN
- Nature of condition: K
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA990915006

## Discrepancy

(CAN) DURING ROUTINE INSPECTION,THE NR 1 BRAKE WAS FOUND TO BE LEAKING.  TEAR DOWN OF THE BRAKE UNIT REVEALED DETERIORATED O-RINGS ON TWO OF THE BRAKE PISTONS, AND THE BACK-UP RINGS WERE FOLDED OVER THE PISTON, BETWEEN THE PISTON ASSY AND THE SLEEVE.  THE BRAKE UNIT WAS REPLACED AND THE AIRCRAFT WAS RETURNED TO SERVICE.

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