# SDR 97ZZZX3384

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 30, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N41019](https://openairdocs.org/aircraft/N41019), registered now
- Make and model: Cessna 421B
- Registry model: [Cessna 421B](https://openairdocs.org/model/cessna-421b) (OpenAirDocs)
- Aircraft serial: 421B0401
- System (JASC): [3243 · Master Cylinder/Brake Valve](https://openairdocs.org/jasc/3243)
- Part: O-Ring
- Part number: MS2877132
- Condition: Worn
- Location: Lt Brake
- Component: Parkerhanfin, 30100
- Stage of operation: TX
- Nature of condition: K
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZX3384

## Discrepancy

LEFT BRAKE INOPERABLE CAUSING PILOT TO LOSE CONTROL AND STRIKE ANOTHER AIRCRAFT.  INVESTIGATION FOUND NO FLUID IN BRAKE, CAUSED BY O-RINGS BEING OLD, WORN, AND HARD AND LEAKING.  REPLACED O-RINGS AND SERVICED BRAKE SYSTEM.  OPERATION WAS NORMAL.

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