# SDR 98ZZZX3732

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 28, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N901CF](https://openairdocs.org/aircraft/N901CF), registered now
- Make and model: Doug MD 900
- Registry model: [Doug MD 900](https://openairdocs.org/model/mcdonnell-douglas-helicopter-md-900) (OpenAirDocs)
- Aircraft serial: 90000012
- System (JASC): [6321 · Main Rotor Brake](https://openairdocs.org/jasc/6321)
- Part: Caliper
- Part number: 900D3403502101
- Condition: Stuck
- Location: Rotor Brake
- Part time: 325 hours
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/98ZZZX3732

## Discrepancy

AFT PISTON WILL NOT RETRACT.  UNIT INSTALLED WHILE AC WAS IN MESA FOR WORK.  REPLACED WITH NEW UNIT, CORRECTED PROBLEM.

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