Yariv Posted May 5 Report Share Posted May 5 Hi, this is my latest issue - I cannot lower the flaps to take-off setting before take-off. When I lower the flaps lever, nothing happens. I have to lower it to full flaps and then raise it up to take-off position to make it work. Raising the flaps from take-off position works fine. it was explained to me that it involves upper limit switches and down limit switches and that in this case it is probably due to a down limit micro switch malfunction. Has anyone experienced this before? thanks, Yariv Quote Link to comment Share on other sites More sharing options...
PT20J Posted May 5 Report Share Posted May 5 Someone posted this schematic a while back. It sounds like a problem with the takeoff down limit switch. Flap switch logic.pdf 1 Quote Link to comment Share on other sites More sharing options...
Yariv Posted May 5 Author Report Share Posted May 5 1 hour ago, PT20J said: Someone posted this schematic a while back. It sounds like a problem with the takeoff down limit switch. Flap switch logic.pdf 75.18 kB · 3 downloads Thank you very much for that. 1 Quote Link to comment Share on other sites More sharing options...
Stephan Kablitz Posted May 9 Report Share Posted May 9 Dear Yariv, we had a similar problem on our M20J. You could not retract the flaps from full to take-off setting. Retracting completely did work however. We also were quite convinced that it would have to be a limit-switch problem. After changing the switch the problem was unchanged. We then had to learn that a cable was chewed up by a mouse that had lived behind the sidewall lining of the baggage compartment. Wouldn't hurt to have a kook, I think... 1 Quote Link to comment Share on other sites More sharing options...
Yariv Posted May 14 Author Report Share Posted May 14 Thanks Stephan. I hope it’s not the case here as my airplane sits in a hangar with cowl plugs in place. I’ll update the thread in July after the airplane comes back from its annual inspection. Quote Link to comment Share on other sites More sharing options...
skykrawler Posted May 14 Report Share Posted May 14 Don't some of the newer models have 3 commanded flap position (rather than continuous)? There was a bulletin to convert to that design which had an additional switch installed in the back. Is this one of those models? Quote Link to comment Share on other sites More sharing options...
Yariv Posted May 20 Author Report Share Posted May 20 On 5/14/2024 at 3:32 AM, skykrawler said: Don't some of the newer models have 3 commanded flap position (rather than continuous)? There was a bulletin to convert to that design which had an additional switch installed in the back. Is this one of those models? It is the original design, 3 position flap lever - up, take-off, and full flaps. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.