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B737-NG LG Viewers  
User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Posted (13 years 5 months 1 week 6 days 23 hours ago) and read 1820 times:

B737-600/700/800 do they have NLG/MLG downlock viewers installed.
If Not Why.
regds.
HAWK.


Think of the brighter side!
7 replies: All unread, jump to last
 
User currently offlineBuzz From United States of America, joined Nov 1999, 697 posts, RR: 21
Reply 1, posted (13 years 5 months 1 week 6 days 17 hours ago) and read 1745 times:

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


User currently offline737LAME From Norway, joined Apr 2001, 75 posts, RR: 4
Reply 2, posted (13 years 5 months 1 week 6 days 14 hours ago) and read 1735 times:

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


User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 3, posted (13 years 5 months 1 week 6 days ago) and read 1719 times:

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.



Think of the brighter side!
User currently offline737LAME From Norway, joined Apr 2001, 75 posts, RR: 4
Reply 4, posted (13 years 5 months 1 week 5 days 19 hours ago) and read 1714 times:

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


User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 5, posted (13 years 5 months 1 week 3 days 8 hours ago) and read 1698 times:

So you saying that Both the primary & secondary Indication use common Proximity sensors, or seperate ie Two proximity sensors.
regds
HAWK.



Think of the brighter side!
User currently offline737LAME From Norway, joined Apr 2001, 75 posts, RR: 4
Reply 6, posted (13 years 5 months 1 week 3 days 8 hours ago) and read 1695 times:

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

Atle


User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 7, posted (13 years 5 months 1 week 3 days 8 hours ago) and read 1695 times:

Thanks.
regds
HAWK.



Think of the brighter side!
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