carolinaflying Posted July 15, 2017 Report Posted July 15, 2017 I've been reading your posts for several months now and have learned a ton, thanks! I was hoping to have something better as my first post, but here goes. I recently purchased my first plane, 1968 M20C. I am now in the middle of my first owner repair, air scoop wire snapped mid flight. Thanks to previous MS posts, I found thorough instructions on how to complete it. My question is how much wire do you see exposed in the fully open position? When I measure at the crank end, I'm seeing about 1.5 inches of movement but at the exterior scoop end I'm only seeing .5 inches at fully open. I doubt the curvature of the crank accounts for that much of a discrepancy but when I tug on the wire from the outside I cannot get anything more. If someone with an intact scoop can advise a measurement, I would be grateful before I close everything back up. FYI, taking lots of photos and planning on updating the instructions I'm using to hopefully save the next poor guy some time! 1 Quote
carusoam Posted July 15, 2017 Report Posted July 15, 2017 Welcome aboard CF. Once you get the ceiling down, look for a drain tube that probably needs to be replaced. Its in the sense-ya-was-in-there already category... Best regards, -a- Quote
carolinaflying Posted July 15, 2017 Author Report Posted July 15, 2017 Appreciate it. I saw your advice to others and checked that already. Surprisingly enough it's in good shape and draining well! I can tell this wire had already been replaced before so I imagine the drain was repaired earlier too. 1 Quote
Hank Posted July 15, 2017 Report Posted July 15, 2017 I'll measure the movement on my 1970 C roof vent tomorrow. 1 Quote
Yetti Posted July 15, 2017 Report Posted July 15, 2017 Good reminder, I will probably shoot it with some triflow Quote
Hank Posted July 16, 2017 Report Posted July 16, 2017 On 7/14/2017 at 8:23 PM, carolinaflying said: I've been reading your posts for several months now and have learned a ton, thanks! I was hoping to have something better as my first post, but here goes. I recently purchased my first plane, 1968 M20C. I am now in the middle of my first owner repair, air scoop wire snapped mid flight. Thanks to previous MS posts, I found thorough instructions on how to complete it. My question is how much wire do you see exposed in the fully open position? When I measure at the crank end, I'm seeing about 1.5 inches of movement but at the exterior scoop end I'm only seeing .5 inches at fully open. I doubt the curvature of the crank accounts for that much of a discrepancy but when I tug on the wire from the outside I cannot get anything more. If someone with an intact scoop can advise a measurement, I would be grateful before I close everything back up. FYI, taking lots of photos and planning on updating the instructions I'm using to hopefully save the next poor guy some time! Measured mine this afternoon, just now remembering to look for this thread . . . . The roof scoop on my C opens an inch and a half. At that point, the inner wire has extended further than this, and is somewhat bent. I can't really get up to it with a ruler since it's buried inside the scoop and is bent to go through the connector and clamped in place. Should have taken a picture . . . . 1 Quote
carolinaflying Posted July 16, 2017 Author Report Posted July 16, 2017 Thanks Hank, that's what I was afraid of. Back to figuring out where that inch is disappearing to. Quote
Hank Posted July 16, 2017 Report Posted July 16, 2017 Lube it good and work it back and forth. Twist that knob over and over again. 1 Quote
PMcClure Posted July 16, 2017 Report Posted July 16, 2017 10 minutes ago, Hank said: Lube it good and work it back and forth. Twist that knob over and over again. Whoa there - what are we talking bout? 1 Quote
Hank Posted July 16, 2017 Report Posted July 16, 2017 Just now, PMcClure said: Whoa there - what are we talking bout? Quote
Raptor05121 Posted July 16, 2017 Report Posted July 16, 2017 2 hours ago, carolinaflying said: Back to figuring out where that inch is disappearing to. This thread went downhill- quick 2 Quote
HRM Posted July 16, 2017 Report Posted July 16, 2017 The cockpit humor never ends on this board. Quote
Hank Posted July 16, 2017 Report Posted July 16, 2017 1 hour ago, HRM said: The cockpit humor never ends on this board. You do realize the origin of "cockpit" is scatalogical? Quote
TheTurtle Posted July 16, 2017 Report Posted July 16, 2017 i heard women pilots call it the box office. 2 Quote
HRM Posted July 16, 2017 Report Posted July 16, 2017 26 minutes ago, Hank said: You do realize the origin of "cockpit" is scatalogical? ??? Cockpit first appeared in the English language in the 1580s, "a pit for fighting cocks". Quote
Hank Posted July 16, 2017 Report Posted July 16, 2017 2 minutes ago, HRM said: ??? Cockpit first appeared in the English language in the 1580s, "a pit for fighting cocks". Interesting. But that's unrelated to its application to aircraft. Quote
Marauder Posted July 16, 2017 Report Posted July 16, 2017 Interesting. But that's unrelated to its application to aircraft. Unless you equate it to two male pilots arguing over how to fly an approach. Sent from my iPad using Tapatalk Pro 1 Quote
carolinaflying Posted August 2, 2017 Author Report Posted August 2, 2017 My repair is complete for now. I have attached the instructions I used as a guide with my pictures and comments added in red. If you don't have time to read it all, my conundrum is described below. I'd appreciate any educated thoughts on why I'm still having problems. While my repair was partly a success, it was not complete. The knob will open the vent from inside but will not close it. When fully open, I cannot push the vent down from the outside but the only way to close it is to crank inside to fully closed and then push down from outside. After multiple troubleshooting methods, I resigned myself to the fact something must be wrong with the shroud itself in an area I did not expose. As I stated earlier, I did not open every interior cover due to them being sealed and not wanting to reseal everything myself. My only guess is that something is supposed to hold the shroud in place as it travels from the vent to the knob and that piece is no longer holding properly. My guess is there is just enough play due to this movement that it cannot fully close. My game plan is to uncover this during my first owner assisted annual and troubleshoot some more. MooneyOverheadFreshAirVentRepair-woPartsBD.docx.docx 1 Quote
rbridges Posted August 2, 2017 Report Posted August 2, 2017 On 7/15/2017 at 10:03 PM, carolinaflying said: Thanks Hank, that's what I was afraid of. Back to figuring out where that inch is disappearing to. On 7/15/2017 at 10:34 PM, Hank said: Lube it good and work it back and forth. Twist that knob over and over again. On 7/15/2017 at 10:49 PM, PMcClure said: Whoa there - what are we talking bout? Quote
jamesm Posted August 3, 2017 Report Posted August 3, 2017 (edited) Yeah same thing happen to me several years ago.... My brother was flying my '67C had just closed cowl flaps and all of sudden BANG. it sure grabs your attention when it first happened. real pain feeding the wire in the cable sheath. Edited August 4, 2017 by jamesm Quote
Guest paulie Posted August 3, 2017 Report Posted August 3, 2017 On 7/15/2017 at 10:03 PM, carolinaflying said: Thanks Hank, that's what I was afraid of. Back to figuring out where that inch is disappearing to. That what she said. Quote
carolinaflying Posted August 3, 2017 Author Report Posted August 3, 2017 Before this thread gets hijacked again with locker room humor, can I ask that any further replies stay on the original topic? Quote
xcrmckenna Posted August 3, 2017 Report Posted August 3, 2017 Unless you equate it to two male pilots arguing over how to fly an approach. Sent from my iPad using Tapatalk Pro I bet their names was Richard....Sent from my iPhone using Tapatalk Quote
Andy95W Posted August 3, 2017 Report Posted August 3, 2017 7 hours ago, carolinaflying said: Before this thread gets hijacked again with locker room humor, can I ask that any further replies stay on the original topic? Well, you can ask... 1 Quote
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