rdv Posted July 25, 2011 Report Posted July 25, 2011 Hello, The landing gear of the '67F won't retract until we see about 90mph airspeed. According to the manual I have, that is about 10mph higher than it should be. Does anyone know if the air switch is adjustable? Is it located in the dynamic pito? Ryan Quote
1970m20e Posted July 25, 2011 Report Posted July 25, 2011 My 1970 m20e also performs as you mentioned. The biggest issue is that I'm well above the airfield with no useable runway left and the landing gear will not go up until I'm above 90 mph. I've found the switch during March annual and see no adjustment to it. I've read that there are different model switches with lower retract speeds. This next annual I'm going to have the manual override put in like many of the newer Mooney's so that I can put the gear up switch in the up position and then if the gear isn't going up, I can press the override button. Quote
Ron McBride Posted July 25, 2011 Report Posted July 25, 2011 I have a 69F. The switch is adjustable in my plane. Get this fixed ASAP. Read your maintenace manual for the recomendation an how to adjust. The plane will need to be on jacks. Your A&P will need to help/supervise. Several years ago, befor I knew about this, I fly out of Grant NM GNT and could not climb with the density altitude and the gear would not retract. I had to push the nose way down to get enough speed to cycle the gear. It was scary. We used a pressure pump with an airspeed indicator attached and cycled the gear many times to get the proper adjustment. This should be completed every annual. Ron Quote
richardheitzman Posted July 25, 2011 Report Posted July 25, 2011 There is an adjustment. You have to hook up a calibrated pitot test set and get the indicated airspeed correct per the manual and then adjust the pressure switch. A Mooney service center can handle that. You don't want to do that on your own. Quote
Clarence Posted July 27, 2011 Report Posted July 27, 2011 It has to make you wonder what kind of maintenance is being done on these aircraft? If the aircraft is older and does not have an over ride as the newer models do how is the gear being raised during 100 hour or annual inspections? As Richard says the switch is adjustable and quite easily as long as you don't have to repair a leaky pitot system. Clarence Quote
Magnum Posted July 27, 2011 Report Posted July 27, 2011 Quote: Clarence It has to make you wonder what kind of maintenance is being done on these aircraft? If the aircraft is older and does not have an over ride as the newer models do how is the gear being raised during 100 hour or annual inspections? Quote
Vref Posted July 27, 2011 Report Posted July 27, 2011 Quote: Magnum You put the gear switch up and blow into the pitot. So you can check at what airspeed the safety switch works, too. Quote
Clarence Posted July 27, 2011 Report Posted July 27, 2011 Thanks Magnus, As a Mooney Service Center I am aware of how it works. I guess I should have been clearer. What I ment to say was how can an airplane be signed off as airworthy when the landing gear safety switch is so far out of adjustment? It makes me wonder what kind of work is being done. As to a method blowing in the pitot is not accurate enough. A piece of surgical rubber tubing streched over the pitot head is slowly rolled up until the gear begins to retract, clamp the tubing closed with a heomstat at this point, now read the airspeed indicator and compare to the POH. If the system does not hold steady you have a leak to fiix, half of the pitot static is now checked as well. Clarence Quote
DaV8or Posted January 15, 2012 Report Posted January 15, 2012 Quote: royagerar ogloszenia towarzyskie Quote
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.