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EliaFrate
Topic Author
Posts: 3
Joined: Tue Dec 19, 2017 1:16 pm

Emergency lights switch 737 800

Tue Dec 26, 2017 9:30 pm

Hello everyone!

Quick and specific question about the emergency lights switch of the 737 800. I know that the switch has 3 positions: Off,Armed and On.
My doubt is about the switch guard. If the switch is in the off position and the guard is closed, does the switch go to Armed?
What if it was on On? It remains there?

If the above is correct, the dimension of the guard is the same of the others on the overhead? does it have a hole?

thanks in advance.

by the way I'm new on this forum, let me introduce myself.
I'm an ultralight pilot just licenced. Aviation enthusiast and simulator builder.
I'm detailing a 737 800 NG simulator in Venice, Italy. And that's the reason of my question.
here is a picture.

Image

Elia Frate
 
msiebert09
Posts: 9
Joined: Sat Jul 18, 2009 4:35 am

Re: Emergency lights switch 737 800

Tue Dec 26, 2017 11:06 pm

Nice setup! Welcome to the forum.
 
atlamt
Posts: 249
Joined: Thu Sep 13, 2001 12:15 am

Re: Emergency lights switch 737 800

Wed Dec 27, 2017 12:54 am

To place the switch in either the Off or Armed position the guard must be lifted to the open position. Closing the guard will return the switch to the center Armed position. This happens either by the guard itself pushing the switch down to center or a lever internal to the guard that will pull the switch up. There is a safety wire hole in the guard but it isn't used in this application because the switch is moved so often. As part of our overnight check we place the lights on to verify all emergency lights are operational. When you are done you just close the cover to turn them off. Then when you shut down the a/c the switch is placed to Off before turning off the power.

I believe the p/n of the guard is B9985-1. It's a little pricey. :o
Fwd to MEL and Placard
 
User avatar
CALTECH
Posts: 3046
Joined: Thu May 17, 2007 4:21 am

Re: Emergency lights switch 737 800

Wed Dec 27, 2017 11:02 am

To place the Emergency Lights in OFF or ON, the switch guard must be opened and the switch moved.
When closing the switch guard, whether in OFF or ON, the switch will go to the ARMED position.
IIRC, the switch guard pushes the switch from OFF to ARMED, and there is a metal bracket that moves with the switch guard and moves the switch from ON to ARMED.
The gun is a precious Symbol of Freedom
Criminals are the deadly cancer on American society
Those who believe otherwise are consumed by an ideology
That is impervious to evidence of tyrants who disarm their citizens
 
User avatar
EliaFrate
Topic Author
Posts: 3
Joined: Tue Dec 19, 2017 1:16 pm

Re: Emergency lights switch 737 800

Wed Dec 27, 2017 9:57 pm

msiebert09 wrote:
Nice setup! Welcome to the forum.

Thank you :)

atlamt wrote:
To place the switch...

CALTECH wrote:
To place the Emergency Lights...


Thank you atlamt and caltech for the detailed replies.
Now I perfectly understand how it works.

I believe the p/n of the guard is B9985-1. It's a little pricey. :o

200 $ is way too much for a switch guard xD

I'll come back with some pictures from a DIY solution for the simulator.
I may need to drill the existing guard on one the centre and add a metal thingy on one side.
We'll see what I came up with.

Best wishes for the new year

Elia

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