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Safety Action


Safety action

As a result of the investigation, the helicopter manufacturer advised that they would examine all bearings on aircraft and assemblies returned for maintenance. The manufacturer advised that a review of the returned assemblies indicated that the change in seal assembly methods introduced in February 1999 appeared to have improved service reliability.

In addition, as a result of reports of failed lower actuator bearings due to insufficient lubrication, the manufacturer issued Service Bulletin SB-42 on 01 August 2001. SB-42 requires lubrication of the lower actuator bearing every 300 flight hours or annually and calls for initial compliance for R44s S/N 0640 and prior by 31 October 2001 (VH-STO was S/N 0369).

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