# SDR 95ZZZX2742

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 10, 1995
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N20971](https://openairdocs.org/aircraft/N20971), registered now
- Make and model: Waco UPF-7
- Registry model: [Waco UPF-7](https://openairdocs.org/model/waco-upf-7) (OpenAirDocs)
- Aircraft serial: 5317
- System (JASC): [3240 · Landing Gear Brake System](https://openairdocs.org/jasc/3240)
- Part: Return Spring
- Part number: JONESNO97
- Condition: Failed
- Location: Lt Brake
- 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/95ZZZX2742

## Discrepancy

DURING INSPECTION FOR DAMAGE AFTER A NOSE-OVER ACCIDENT, THE LEFT BRAKE MASTER CYLINDER RETURN SPRING (5.5 INCHES LONG) WAS FOUND MISSING.  IT WAS FOUND IN THE BELLY WITH A HOOK END MISSING.  WITHOUT THIS RETURN SPRING, THE BRAKE WILL NOT RELEASE.  ACCORDING TO THE WACO ASSOC., THIS HAS HAPPENED BEFORE.  HISTORY OF THE PART IN THE 55 YEAR OLD VINTAGE AIRPLANE COULD NOT BE DETERMINED.

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