PPRuNe Forums


Tech Log The very best in practical technical discussion on the web

Reply
 
Thread Tools Search this Thread
Old 12th Feb 2018, 18:56   #1 (permalink)
Thread Starter
 
Join Date: Feb 2009
Location: UK
Posts: 88
Boeing 777 nose gear leg landing and taxi lights

The Boeing 777 has two landing light bulbs and two taxi light bulbs on the nose gear leg. I assume these only work when the gear is down but I maybe wrong to assume that. Can anyone confirm please?
draglift is offline   Reply With Quote
Old 12th Feb 2018, 22:25   #2 (permalink)
 
Join Date: Feb 2004
Location: Australia
Posts: 1,262
They all come on when the nose gear is down and locked. This is unlike the 747-400 which uses air/ground for runway turnoff and (optional) taxi lights. These lights are not used as foot heaters
NSEU is offline   Reply With Quote
Old 13th Feb 2018, 00:07   #3 (permalink)
 
Join Date: Jan 2018
Location: Mexico
Posts: 19
NSEU is correct - ELMS looks for Nose gear down and locked signal in the logic before it will power on the relay for the lights.
Highway1 is online now   Reply With Quote
Old 13th Feb 2018, 10:20   #4 (permalink)
 
Join Date: Apr 2002
Location: england
Posts: 262
The correct selection of the switch on the overhead panel will still be required to bring the lights on and BTW " bulbs" are planted in the ground, filament is the correct term!

Last edited by yotty; 13th Feb 2018 at 10:31.
yotty is offline   Reply With Quote
Old 13th Feb 2018, 16:09   #5 (permalink)
 
Join Date: Apr 2004
Location: Dorset UK
Age: 64
Posts: 862
yotty,

If filament is the correct term for aircraft lamps, what do we call these new fangled LED things?
dixi188 is offline   Reply With Quote
Old 13th Feb 2018, 16:46   #6 (permalink)
 
Join Date: Mar 2006
Location: USA
Posts: 1,026
We call them "practically daylight"!
Check Airman is offline   Reply With Quote
Old 13th Feb 2018, 20:25   #7 (permalink)
 
Join Date: Apr 2008
Location: nowhere
Posts: 1,965
Quote:
Originally Posted by NSEU View Post
They all come on when the nose gear is down and locked. This is unlike the 747-400 which uses air/ground for runway turnoff and (optional) taxi lights.
True. I remember seeing a 744 land many years ago and wonder why they would be turning on the taxi light on the nosegear just at the moment of touchdown instead of concentrating on landing. Twenty-some years later, I discovered why...air-ground sensor.

Last edited by JammedStab; 19th Feb 2018 at 20:07.
JammedStab is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT. The time now is 00:32.


1996-2012 The Professional Pilots Rumour Network

SEO by vBSEO 3.6.1