[GMAs]

Here we have the two parts... first the squatt switch... which is triggering it.. and the gear switches saying that the gear is down...

You can trouble shoot your problem by two ways... one is to put the plane on jacks and check the gear...

The other is to pull the covers on the engines and take a good close look at the two microswitches that are on the opposite side of the throttle attachment point... here you will see a little cam like thing that a microswitch roller used to roll on... why do I say used to.. is because they never get lubed right and they instead of rolling... slide back and forth and wear a flat spot on the little roller on the microswitch arm roller... now when you check for flat spots on that.. and don't find any... then go look at the wires that used to be soldered to the back of the switch... here you may find one that has vibriated and broken loose... a simple matter of getting out the soldering iron and re attaching it...

finally if all that looks good... their is the old contenuity check of the switch its self... here you want to .. without putting power to the plane... move the throttle open about half way so the switch will click and the cam will release it to do so... attach a circuit checker.. and when you move the little arm you should see it make and break the contact... if it doesn't then you need a new microswitch... but,....

most of the time you will find the wires broken or the switch moved or the roller flattened at one spot and is causing it to think you have not put the gear down yet... kinda thing... check the service manual for the schematic...

by the way if you re-adjust the switch make sure it is to the service manual settings... and don't over tighten the screws on the mount... else you will crack the phonolic of the switch and then you need to go get a new one...

and.... Newark electronics has them... under microswitch brand.. so you don't have to pay the high price for the cessna stock... just make sure you match the old one... that has a number on it... to the new one... and your golden...smile...

They do wear the little roller out... and that is generally what goes bad... flat spots develop.. because they are not lubed properly... smile...


Ya all might want to check yours too... and oh by the way.. their are two... one on the fwd engine the other on the rear... and is a duplicate of the fwd one... it is used to tell you when you have low MP and the gear is not down... thing... hope this helps..GMAs...