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brianbutler1984
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B737-100/200 yoke/column clicking sound

Sun Jan 22, 2017 9:35 pm

hi. i've watched tons of videos on all the 737 variants. i have noticed that the 737-100/200 yoke or column makes a clicking sound when pitched up or down. no other 737 variant yoke makes that clicking sound. i love it. but my question is: why only the 737-100/200 models? wish the 737NG would make that clicking sound
 
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Starlionblue
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Re: B737-100/200 yoke/column clicking sound

Mon Jan 23, 2017 12:40 am

It's not the control column. The clicking comes from the trim mechanism. You can see the trim wheels spinning when you get the clicks.

It's not just the Jurassic 737. The Classic and NG make the same sound:
Classic https://vimeo.com/34501723
NG https://www.youtube.com/watch?v=-X01uY0bJs0
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
apfpilot
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Re: B737-100/200 yoke/column clicking sound

Mon Jan 23, 2017 4:44 pm

Starlionblue wrote:
It's not the control column. The clicking comes from the trim mechanism. You can see the trim wheels spinning when you get the clicks.

It's not just the Jurassic 737. The Classic and NG make the same sound:
Classic https://vimeo.com/34501723
NG https://www.youtube.com/watch?v=-X01uY0bJs0


I've been told that catching one of those in the shin with the handle out can be quite painful.
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brianbutler1984
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Re: B737-100/200 yoke/column clicking sound

Mon Jan 23, 2017 8:53 pm

thanks for the links but that wasn't the sound i was talking about. watch this clip:

https://www.youtube.com/watch?v=tEv_MlGLesQ

listen closely as soon he pulls back on the yoke. it's a clicking or ticking sound. it can't be the trim mechanism because it's not even moving.
 
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Starlionblue
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Re: B737-100/200 yoke/column clicking sound

Mon Jan 23, 2017 11:37 pm

Yes, I see. Quite faint.

I don't know but it sounds like something is vibrating.
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
brianbutler1984
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Re: B737-100/200 yoke/column clicking sound

Tue Jan 24, 2017 12:17 am

yeah only the 737-100/200 models do that.
 
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richcam427
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Re: B737-100/200 yoke/column clicking sound

Tue Jan 24, 2017 4:46 pm

apfpilot wrote:
Starlionblue wrote:
It's not the control column. The clicking comes from the trim mechanism. You can see the trim wheels spinning when you get the clicks.

It's not just the Jurassic 737. The Classic and NG make the same sound:
Classic https://vimeo.com/34501723
NG https://www.youtube.com/watch?v=-X01uY0bJs0


I've been told that catching one of those in the shin with the handle out can be quite painful.


Yout don't even know. That damn thing spinning around like it's possessed will break your kneecaps over time if you're not careful. That's one of the areas where Airbus got it right.

As far as the sound in the video goes, it definitely doesn't sound "normal." It sounds like something with the yoke mechanism is worn out, which wouldn't be too far off base considering the aircraft's age.
 
Whatsaptudo
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Re: B737-100/200 yoke/column clicking sound

Tue Jan 24, 2017 9:20 pm

In older versions of the 737, the Autopilot engagement was through a "paddle" (it's now a button) on the Glaresheild. This paddle was held up in the engaged position by a magnet. When the Autopilot was disconected, this magnet would "let go" and the paddle would fall. There are several ways to disengage the Autopilot one of which is to move the control column and over power the Autopilot. What you are hearing is the disconnection of the magnet every time the pilot moves the control column. It doesn't happen on new aircraft as none have the paddle engagement. It happens on the -300,-400,-500 also if they have the old MCP with the paddles.
 
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HAWK21M
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Re: B737-100/200 yoke/column clicking sound

Wed Jan 25, 2017 11:32 am

apfpilot wrote:
Starlionblue wrote:

I've been told that catching one of those in the shin with the handle out can be quite painful.


Thats how you differentiate the Commander from the F/O ....by the side the limping leg is located :)

On a serious note.....those candles if left out can cause severe damage to the knees.
I may not win often, but I damn well never lose!!! ;)
 
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tb727
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Re: B737-100/200 yoke/column clicking sound

Wed Jan 25, 2017 3:30 pm

apfpilot wrote:
Starlionblue wrote:
It's not the control column. The clicking comes from the trim mechanism. You can see the trim wheels spinning when you get the clicks.

I've been told that catching one of those in the shin with the handle out can be quite painful.


It'll whack you in the knee 3 times before you can say ouch.
Too lazy to work, too scared to steal!
 
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7BOEING7
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Re: B737-100/200 yoke/column clicking sound

Wed Jan 25, 2017 3:34 pm

HAWK21M wrote:

On a serious note.....those candles if left out can cause severe damage to the knees.


Or your hand/wrist if you make a wrong move without thinking.

As far as the Runaway Stabilizer checklist, if it doesn't stop when you put the STAB TRIM CUTOUT switches to CUTOUT the next step is "Grasp and hold" which is an art in itself -- handle is down of course.
 
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richcam427
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Re: B737-100/200 yoke/column clicking sound

Thu Jan 26, 2017 7:20 am

You always know a Boeing 737 captain/FO, because his knees are probably blown by age 30.
 
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Balerit
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Re: B737-100/200 yoke/column clicking sound

Thu Jan 26, 2017 7:49 am

It's been a long time since I worked on those aircraft but weren't there micro-switches below the column that clicked when the column moved.
Licensed Aircraft Maintenance Engineer (retired).

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