# SDR CA970225001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 13, 1996
- Submitted: March 26, 2000
- Operation: Air carrier
- Make and model: Bolkms BO105C
- Engine: Allsn 250C20B
- System (JASC): [6230 · Main Rotor Mast/Swashplate](https://openairdocs.org/jasc/6230)
- Part: Swashplate
- Part number: 10541904
- Condition: Bearing Failed
- Location: Lower Seal
- Part time: 3,963 hours
- Stage of operation: DE
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA970225001

## Discrepancy

(CAN) DURING DAILY INSPECTION THE AME NOTICED BLACK GREASE COMING FROM BOTTOM SURFACE OF SWASHPLATE. SWASHPLATE REGREASED AND AIRCRAFT RETURNED TO SERVICE. APPROXIMATELY 1.5 HOURS INTO FLIGHT A 'HOWLING' NOISE HEARD. AME FOUND EXCESSIVE BLACK GREASE IN SAME AREA. ALL LINKS DISCONNECTED AND SWASHPLATE CHECKED FOR ROTATIONAL SMOOTHNESS. EXCESSIVE ROUGHNESS FELT, LOWER BEARING WAS ROTATING IN OUTER RING.

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