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Why Does The 777 Have 3 Rear Nav Lights?  
User currently offlineAV8AJET From United States of America, joined Sep 2003, 1340 posts, RR: 1
Posted (10 years 8 months 1 week 6 days 17 hours ago) and read 5662 times:

Why does the B777 have three rear facing (white) nav lights? The early B777's of United and BA only have two (each wing), and later Boeing added one to the tail as well as the wing tip ones. It can't be a wing span issue because the 744 has only one, no rear facing ones on the wing tips. The early 777's had the anti-collision strobe by the apu outlet but not the nav light. Just curious...


"To fly or not to fly there is no question!"
11 replies: All unread, jump to last
 
User currently offlineDavidoff From United States of America, joined Dec 2003, 6 posts, RR: 0
Reply 1, posted (10 years 8 months 1 week 6 days 17 hours ago) and read 5593 times:

This is my fist post on A.net....
When the first 777s without the rear nav light were delivered to United, there were numerous instances where smaller aircraft like 737s almost taxied into the 777s at night because they were so much lower. It was hard for the pilots of the smaller aircraft to judge where the tail of the 777 ended because it was dark and so much higher. United let Boeing know about the problem after about a year of the 777 being in service with them and they added the third nav light. Now its a lot easier for the pilots of following aircraft to judge distances and prevent collisions.


User currently offlineATA L1011 From United States of America, joined Feb 2001, 1379 posts, RR: 6
Reply 2, posted (10 years 8 months 1 week 6 days 16 hours ago) and read 5579 times:

Its an option from what I've heard from several reputable sources also those are strobe lights.

[Edited 2003-12-12 20:32:19]


Treat others as you expect to be treated!
User currently offlineFlyguy1 From United States of America, joined Jun 1999, 1738 posts, RR: 4
Reply 3, posted (10 years 8 months 1 week 6 days 16 hours ago) and read 5556 times:

That third light also makes it much easier to spot 777's at night  Big grin


727, L1011, MD80, A300, 777-200, 737-300, 737-700, 747-400, 757-200, 737-800, A320. E190, E135, 767-200, CRJ9
User currently offlineIfly2eat From United States of America, joined Apr 2008, 8 posts, RR: 0
Reply 4, posted (10 years 8 months 1 week 6 days 16 hours ago) and read 5530 times:

They can also defer (i.e. defer for maintenance) one or even two of the lights. So really it is just for redundancy.


Fly the friendly skys and stay out of mine.
User currently offlineWesternDC1010 From United States of America, joined Jul 2003, 327 posts, RR: 3
Reply 5, posted (10 years 8 months 1 week 6 days 16 hours ago) and read 5363 times:

Doesn't the Boeing 767-400 have these now as well?

- Ron
Western DC-10-10



Western Airlines - The Only Way To Fly
User currently offlineMaverickM11 From United States of America, joined Apr 2000, 17416 posts, RR: 46
Reply 6, posted (10 years 8 months 1 week 6 days 15 hours ago) and read 5311 times:

I thought all commercial airliners had a white nav light at the end of the tail?


E pur si muove -Galileo
User currently offlineATA L1011 From United States of America, joined Feb 2001, 1379 posts, RR: 6
Reply 7, posted (10 years 8 months 1 week 6 days 15 hours ago) and read 5153 times:

RE: western DC10
yes the 767-400 has the one bright strobe near the tailcone but it doesnt have the strobes on the wingtip anymore at all.


RE:Maverick DC-10
Not all have the strobe on the wingtip/tail; including the DC-8,BAE-146,Fokker-F-100 to name a few.



Treat others as you expect to be treated!
User currently offlineMaverickM11 From United States of America, joined Apr 2000, 17416 posts, RR: 46
Reply 8, posted (10 years 8 months 1 week 6 days 14 hours ago) and read 5134 times:

"RE:Maverick DC-10
Not all have the strobe on the wingtip/tail; including the DC-8,BAE-146,Fokker-F-100 to name a few."

First of all *ahem* it's M11...not DC-10 =P.

I still think all aircraft need to have a rear white nav light, including the ones you listed above:
http://www.airliners.net/open.file/348455/L/
http://www.airliners.net/open.file/229216/L/
http://www.airliners.net/open.file/193265/L/
http://www.airliners.net/open.file/262584/L/
http://www.airliners.net/open.file/162389/L/



E pur si muove -Galileo
User currently offlineATA L1011 From United States of America, joined Feb 2001, 1379 posts, RR: 6
Reply 9, posted (10 years 8 months 1 week 6 days 14 hours ago) and read 5051 times:

Key word M11 you said tail, they have a strobe but not on the tail, DC8 is on the end of the "tailcone",146 as well, the F100's is at the back of the point of the vertical stab.


Treat others as you expect to be treated!
User currently offlineHlywdCatft From United States of America, joined Jan 2001, 5321 posts, RR: 6
Reply 10, posted (10 years 8 months 1 week 6 days 13 hours ago) and read 4925 times:

If I am not mistaken A319/20/21 have the rear navigation lights too, but not on the wingtips

Yes the 777 is recognizable while flying at night. I live three miles north of MCO and I saw a 772 taking off to the south which had to been 5-6 miles away, but it was easilly recognizable because of the three white lights. It was most likely the BA flight since we pretty much only get one daily Delta 772 nowadays here and that departs around 2-3pm


User currently offlineAS739X From United States of America, joined Apr 2003, 6123 posts, RR: 23
Reply 11, posted (10 years 8 months 1 week 6 days 12 hours ago) and read 4856 times:

Western, you are correct. The 767-400 also has it.
ASSFO



"Some pilots avoid storm cells and some play connect the dots!"
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