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carolinaflying
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carolinaflying Rookie

carolinaflying

Posted
Posted

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!

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carusoam Grand Master

carusoam

Posted
Posted

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-

carolinaflying Rookie

carolinaflying

Posted
  • Author
Posted

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.

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Hank Grand Master

Hank

Posted
Posted
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 . . . .  :rolleyes:

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 . . . . 

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PMcClure Mentor

PMcClure

Posted
Posted
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?

 

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Hank Grand Master

Hank

Posted
Posted
1 hour ago, HRM said:

The cockpit humor never ends on this board.

You do realize the origin of "cockpit" is scatalogical?

HRM Grand Master

HRM

Posted
Posted
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". 

Hank Grand Master

Hank

Posted
Posted
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.

Marauder Grand Master

Marauder

Posted
Posted
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.


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  • 3 weeks later...
carolinaflying Rookie

carolinaflying

Posted
  • Author
Posted

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

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rbridges Grand Master

rbridges

Posted
Posted
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?

 

:D:D

jamesm Mentor

jamesm

Posted
Posted (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 by jamesm
Guest paulie

Guest paulie

Posted
Posted
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.

xcrmckenna Veteran

xcrmckenna

Posted
Posted


Unless you equate it to two male pilots arguing over how to fly an approach.


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I bet their names was Richard....


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Andy95W Grand Master

Andy95W

Posted
Posted
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...

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