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HAWK21M
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Posts: 29978
Joined: Fri Jan 05, 2001 10:05 pm

B737-NG LG Viewers

Thu Apr 12, 2001 9:20 pm

B737-600/700/800 do they have NLG/MLG downlock viewers installed.
If Not Why.
regds.
HAWK.
I may not win often, but I damn well never lose!!! ;)
 
Buzz
Posts: 694
Joined: Sun Nov 21, 1999 11:44 pm

RE: B737-NG LG Viewers

Fri Apr 13, 2001 4:07 am

Hi Hawk21M, Buzz here. We don't have the 737NG's, all ours have the portholes on the floor.
But the 757's, 767's, 777's, and A320's have a pair of prox sensors and it seems not to be a problem in the last several years.
g'day
 
737LAME
Posts: 75
Joined: Sat Apr 07, 2001 3:14 pm

RE: B737-NG LG Viewers

Fri Apr 13, 2001 6:46 am

Hi Hawk.

The B737 NG have 2 sepparate proximity down sensors on each gear downlock link. System1 & 2

System 1, gets power from the ground service bus.
Indication is displayed above the gear lever on the P2 panel.

System 2, Gets power from the Dc switched Hot Battery bus. And are displayed on the P5 Overhead panel.

Dual sensors, Dual circuits eleminate the need for down lock viewers.

Atle  Smile/happy/getting dizzy
 
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HAWK21M
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Posts: 29978
Joined: Fri Jan 05, 2001 10:05 pm

RE: B737-NG LG Viewers

Fri Apr 13, 2001 8:21 pm

Thanks buzz/lame.
So the carpets have no more cutouts in them aft of the Emergency exits  Smile

But on a serious note, is this dual indication system Proximity switch type or is it the Microswitch type.

regds
HAWK.
I may not win often, but I damn well never lose!!! ;)
 
737LAME
Posts: 75
Joined: Sat Apr 07, 2001 3:14 pm

RE: B737-NG LG Viewers

Sat Apr 14, 2001 1:17 am

No more hole in the carpet.

All the gear sensors are of the proximity switch type on the 737 NG landing gears up / down or ground / air sensing.

All info is routed to the PSEU (Proximity Switch Electronic Unit)

Atle
 
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HAWK21M
Topic Author
Posts: 29978
Joined: Fri Jan 05, 2001 10:05 pm

RE: B737-NG LG Viewers

Mon Apr 16, 2001 12:47 pm

So you saying that Both the primary & secondary Indication use common Proximity sensors, or seperate ie Two proximity sensors.
regds
HAWK.
I may not win often, but I damn well never lose!!! ;)
 
737LAME
Posts: 75
Joined: Sat Apr 07, 2001 3:14 pm

RE: B737-NG LG Viewers

Mon Apr 16, 2001 1:00 pm

Each Gear Down sensing have 2 proximity sensors.One for system 1 the other for system 2
Not one common sensor!

Atle
 
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HAWK21M
Topic Author
Posts: 29978
Joined: Fri Jan 05, 2001 10:05 pm

RE: B737-NG LG Viewers

Mon Apr 16, 2001 1:07 pm

Thanks.
regds
HAWK.
I may not win often, but I damn well never lose!!! ;)

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