# SDR COMA9610399

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 16, 1996
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N462CA](https://openairdocs.org/aircraft/N462CA), registered now
- Make and model: Emb EMB-120RT
- Registry model: [EMB EMB-120RT](https://openairdocs.org/model/embraer-emb-120rt) (OpenAirDocs)
- Aircraft serial: 120264
- Engine: Pwa PW118
- Propeller: Hamstd 14RF9
- System (JASC): [6110 · Propeller Assembly](https://openairdocs.org/jasc/6110)
- Part: Insert
- Part number: 8173861
- Condition: Worn
- Location: Prop Bearing
- Part time: 1,968 hours
- Component: RFC11AA16A
- 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/COMA9610399

## Discrepancy

PROPELLER ASSEMBLY WAS REMOVED FOR EXCESSIVE VIBRATION DURING DISASSEMBLY AND INSPECTION, IT WAS DETERMINED THAT THE VIBRATION WAS DUE TO THE UNEVEN WEAR OF THE BEARING INSERT.  INSERT HAD DETERIORATED FROM .100 INCH TO .0840 INCH AT THE THINEST WALL TO .098 INCH AT THE THICKEST WALL WEARING IN AN OVAL FASHION.  BLADE PIN AND BEARING WERE REMOVED FROM SERVICE AND REPLACED WITH SERVICABLE UNITS.  PART TOTAL CYCLES, 2,044.

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