MT Propeller has requested the FAA issue an Airworthiness Directive (AD) with the goal of locating and updating the small number of propellers that have not yet had MT SB 30 accomplished.
This only affects a very small population of selected MT prop manufactured between late 2013 and 2014. These props may contain lag bolts in the blade roots from a run that did not meet the standards demanded by MT-Propeller.
If your MT Prop s/n is between 13XXXX and 14XXXX, you need to check the SB 30.pdf document to see if your prop s/n is included. See attached below on this page.
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