M252 Posted September 28, 2013 Report Posted September 28, 2013 During the last 5 flights or so the flaps in my M20K do not always work. The first time when I could not extend them for landing cylcing of the circuit breaker helped. Today I could extend them during landing after cylcing of the circuit breaker but they did not move afterwards on the ground. The circuit breaker never pops out. Thus I do not think that I have a short circuit. Has anybody seen unreliable electric flaps in other Mooneys? Any experience what might be the cause?
laytonl Posted September 28, 2013 Report Posted September 28, 2013 Dirty limit switches on the flap motor are a frequent culprit on the m20j. I assume your flaps are similar. Lee
Marauder Posted September 28, 2013 Report Posted September 28, 2013 During the last 5 flights or so the flaps in my M20K do not always work. The first time when I could not extend them for landing cylcing of the circuit breaker helped. Today I could extend them during landing after cylcing of the circuit breaker but they did not move afterwards on the ground. The circuit breaker never pops out. Thus I do not think that I have a short circuit. Has anybody seen unreliable electric flaps in other Mooneys? Any experience what might be the cause? I just replaced my flap circuit breaker for this exact problem. The breakers do fail like this.
M252 Posted September 29, 2013 Author Report Posted September 29, 2013 Today I cleaned the limit switches with contact spray and indeed normal function afterwards... Thanks for the hint. BTW, I only rinsed the switches without opening them. Is that sufficient? How often do you clean them?
laytonl Posted September 29, 2013 Report Posted September 29, 2013 No need to open the switches. I clean my flap swicthes at every annual and that is generally sufficient. Another trick is to grab the trailing edge of the flaps and wiggle them. Sometimes this will open up the micro switches. Lee
M252 Posted September 30, 2013 Author Report Posted September 30, 2013 Thanks Lee. I will try that next time.
carusoam Posted December 1, 2013 Report Posted December 1, 2013 Contact cleaner.... A spray can of something I used to buy from Radio Shack... Welcome aboard, Ryan. The position sensors on the flap system are a bit of annoyance.... But, popping CBs, is probably worth identifying the "whys" this is occurring. Best regards, -a-
laytonl Posted December 2, 2013 Report Posted December 2, 2013 CRC makes electrical contact cleaner. Lee
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