Advice on Post-Maintenance M20J MSE Flight after Magneto Overhaul

[Derek]

Other than checklist items like the mag check at run-up, and general engine roughness and performance compared to usual.

Are there any specific items to be extra alert to?

Did an OH at annual this year. First time with this item as an owner.

[toto]

Is it a Bendix dual mag? Or separate mags?

[Derek]

22 hours ago, toto said:

Is it a Bendix dual mag? Or separate mags?

It's the dual.

[EricJ]

The dual mag operates identically to separate mags.    There is no difference in operation, runup, or performance expectations.   

[Justin Schmidt]

Extra brief pre take off, expect a failure.  

Also, if it was OH, make sure you follow a good break in, don't pussyfoot on the ground

[toto]

1 hour ago, EricJ said:

The dual mag operates identically to separate mags.    There is no difference in operation, runup, or performance expectations.   

The reason I asked whether it was a dual mag was to suggest checking the mounting hardware to be sure that it was torqued correctly. There’s a service bulletin for the dual mag, and obviously if the dual mag comes loose the consequences are different than if a single mag comes loose

 

Dual Magneto Attachment.pdf

[DC_Brasil]

If you have an engine monitor and download the data, take a look what your normal CHTs were in different phases: after start, at runup, after takeoff, at cruise power.  If you have a magneto problem, especially related to timing, you'll be able to spot a difference in CHTs. At high power (takeoff) be extra vigilant for any roughness or unusual temps.

[Yetti]

couple of fast taxis.  Come back and check for leaks.   Then circle up over the airport while checking things.

[Thedude]

3 hours ago, toto said:

The reason I asked whether it was a dual mag was to suggest checking the mounting hardware to be sure that it was torqued correctly. There’s a service bulletin for the dual mag, and obviously if the dual mag comes loose the consequences are different than if a single mag comes loose

 

Dual Magneto Attachment.pdf 817.95 kB · 2 downloads

I took my plane in for my first annual and the shop said the lower mounting bracket on the dual mag was missing. Terrifying thought.

[Derek]

10 hours ago, Thedude said:

I took my plane in for my first annual and the shop said the lower mounting bracket on the dual mag was missing. Terrifying thought.

The IA did tell me the mounting flange was cracked. Yikes.

[Derek]

12 hours ago, DC_Brasil said:

If you have an engine monitor and download the data, take a look what your normal CHTs were in different phases: after start, at runup, after takeoff, at cruise power.  If you have a magneto problem, especially related to timing, you'll be able to spot a difference in CHTs. At high power (takeoff) be extra vigilant for any roughness or unusual temps.

Great idea. Will do some recon with Savvy.