# SDR 98ZZZX337

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 15, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Filed by: [Hartzell Service Center, repair station SJ3R843L](https://openairdocs.org/faa-repair-station/SJ3R843L/hartzell-service-center.md) (OpenAirDocs)
- Make and model: Beech 1900D
- Registry model: [Beech 1900D](https://openairdocs.org/model/beech-1900d) (OpenAirDocs)
- Propeller: Hartzl HCE4A3A
- System (JASC): [6114 · Propeller Hub Section](https://openairdocs.org/jasc/6114)
- Part: Fork Spacer
- Part number: B468
- Condition: Separated
- Location: Propeller Hub
- Component: E3932
- Stage of operation: NR
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/98ZZZX337

## Discrepancy

ONE OF FOUR B-468 FORK SPACERS SEPARATED FROM THE D495 FORK AND WAS FLOATING FREELY INSIDE THE HUB CAVITY CAUSING A RATTLING SOUND.  SIGNIFICANT DAMAGE INCURRED TO THE FORWARD AND AFT HALVES OF THE INTERIOR CENTRAL WEB AREA OF THE PROPELLER HUB.  SUSPECT CAUSE OF FAILIURE IS B-468 IS TOO HARD AND BRITTLE.  CALL OUT FOR HARDNESS IS ROCKWELL 33-37 RC.  SUBJECT PIECE TESTS AT 44.9 RC.

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