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Old 07-02-2023, 10:29 AM
Brett H Brett H is offline
Join Date: Oct 2013
Location: Columbus, Indiana
Posts: 83
Default Engine Mount to Engine Bolt Torque Specification

I realize that I am joining this discussion late.

When I attached my engine mount to my 912 ULS two years ago the KAI directed one to the Rotax Heavy Maintenance manual for the torque specification. Which was 40 Nm and no Loctite.

The updated Rotax Heavy Maintenance manual (second edition, revision 0, dated September 2022 71-00-00 page 20) now states that the torque specification is 60 Nm AND Loctite 243 is to be applied.

A dramatic change. Does anyone know why this change was made? This seems to have been little formal notification of this change.

To implement this change on a flying plane, I’m assuming that the best way to make this change is to remove one bolt at a time, take care not to let any shims fall out, reuse the bolt if it looks fine, apply the Loctite 243 and install to the 60 Nm torque specification. Finally, adding the “Inspection Paint Stripe” on the head of the bolts addresses the ongoing inspection requirement.

Agreed? Thoughts?


Columbus, IN
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