My plane just got out of the annual inspection. One of the things they found was a defective switch for the nav lights. In troubleshooting the mechanic swapped the pitot heat switch to test the lighting circuit and found that that switch was no good. I never have ever used pitot heat so had no idea! Anyway, we needed to replace both switches. And the previous owner had the beacon switch changed at some point and they put in a toggle switch. So I decided to replace all 3 switches with the correct Cessna parts so all 4 switches (the 3 mentioned and the landing/taxi light) matched.
Well, it turns out that some time in the past Cessna changed the switches and knobs. Now they come with great big ugly light brown knobs, and they also have a 10-32 knob shaft (original was 8-32). So I can't easily just put the old knobs on (remember the landing light is still the original), and even at that I am still short one original for the beacon.
I experimented with an original and drilled and tapped it to 10-32 and that worked wonderfully. So I can use the 3 originals. BUT - I still need one more.
Does anyone have a spare (or two) of these knobs? They are the older style push/pull on the 1968s (not sure what year they changed to rocker switches). The Cessna part number is S1760-1. I have attached a couple of pics.
