# SDR AU960054

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 1, 1996
- Submitted: March 26, 2000
- Operation: General aviation
- Make and model: Fokker F.28 MK4000
- Registry model: [Fokker F.28 MK4000](https://openairdocs.org/model/fokker-f-28-mk4000) (OpenAirDocs)
- System (JASC): [5520 · Elevator Structure](https://openairdocs.org/jasc/5520)
- Part: Elevator
- Condition: Out Of Balance
- Location: Elevator Struct
- Stage of operation: CR
- Nature of condition: F
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AU960054

## Discrepancy

(AUS) PILOT EXPERIENCED FLUTTER THROUGH THE CONTROL COLUMN AND AIRFRAMEWHICH COMMENCED AT MACH 0.67 TO 0.69 - FLUTTER WORSENED TO PUMPING ACTION AND CEASED WHEN SPEED WAS REDUCED TO BELOW 0.67 MACH - SUSPECT LH ELEVATOR UNBALANCED - WEIGHTS ADDED TO LHELEVATOR

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