On the engine panel there are two very special switches. A kind person donated the two switches to me. Both switches have double functions, a rotary switch to make the choice on the panel and a self centering mechanism to adjust engine settings.
Both switches had a problem on the outer axis, in that it was almost impossible to put a knob on it. It could only be fixed by modifying the rotary switch. A new aluminum shaft had to be installed, so this way the problem would never happen again. Both switches suffered the same problem.
The repair of both switches was done and they have been mounted on the panel.
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The two repaired switches finds there home at the "Engine Display" panel.
After mounting the correct knobs all that is left to do is a bezel for the newly designed flap gauge.
Engine display panel finished
The modification of a flap gauge
N1 and SPDREF switch repair