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Boeing 737 Landing Light Question  
User currently offlineRolex01 From , joined Dec 1969, posts, RR:
Posted (12 years 10 months 6 days 8 hours ago) and read 3177 times:

Why on some 737's.. (And a few other aircraft, mostly newer bizjets) the landing lights flash real softly. First the left, then the right. Mostly on decent weather days. I asked an A320 pilot, he had no idea. A320 doesnt do it.

1) Is it a visibility thing?

or

2) Did the pilots forget to "set" the lights?

I dont know. I have always wondered this.

Thanks.



17 replies: All unread, jump to last
 
User currently offlineBoeing nut From , joined Dec 1969, posts, RR:
Reply 1, posted (12 years 10 months 6 days 8 hours ago) and read 3090 times:

It's actually a type of technology to increase visibility for other aircraft. It was originally designed for corporate aircraft, but incorporated for airliners. As far as I know, the 737 is the only one so far with this technology.

User currently offlineATA L1011 From United States of America, joined Feb 2001, 1392 posts, RR: 6
Reply 2, posted (12 years 10 months 6 days 8 hours ago) and read 3069 times:

Actually its a safety thing and makes you mmore visible to other aircraft. Southwest is the only US carrier to have this feature with theri 737's. By the way their whole fleet doesnot yet have this feature.


Treat others as you expect to be treated!
User currently offlineHeavymetal From , joined Dec 1969, posts, RR:
Reply 3, posted (12 years 10 months 6 days 7 hours ago) and read 3054 times:

As someone who's office window was right under the downwind approach to DAL, I can confirm ATA's post.

I believe the new "ambulance flashers" are only on the SWA Nex Gen 737s....or are they retrofitting? Can't be a tough thing to do.


User currently offlineATA L1011 From United States of America, joined Feb 2001, 1392 posts, RR: 6
Reply 4, posted (12 years 10 months 6 days 7 hours ago) and read 3043 times:

Well some of the 737-200's and 300's have them installed as well Heavymetal.


Treat others as you expect to be treated!
User currently offlineNbirger From Canada, joined Mar 2001, 69 posts, RR: 0
Reply 5, posted (12 years 10 months 6 days 7 hours ago) and read 3042 times:

Hello,

I know for a fact, WestJet has it on most of their 737's. I've seen it on the 732's they have as well, so they must of retro-fitted most of them.

Take Care,

Nick


User currently offlineAfitch7881 From United States of America, joined Aug 2000, 816 posts, RR: 1
Reply 6, posted (12 years 10 months 6 days 6 hours ago) and read 3020 times:

Living on the approach to PHX I often see this happening. I say maybe 1 out of 5 SW jets I see have this feature.

Also, anyone notice how only A319-320 have double strobes, meaning they dont flash once but twice in a row. I am not sure if the A321 does this or not.

On the DC-10/MD-11, it seems like it does this, however there is 2 seperate strobes, on on the front edge of wing tip and one on back edge so it looks like it is double flashing from forward and backward but not from side. Anyone know what I am talking about?

Being in PHX, seeing a lot of Airbus, it is common to see the double strobed HP jets fly in. however it isnt just a HP thing because US, UA, NW all have it on their airbus so it must be a airbus thing.

Eric



User currently onlineVonRichtofen From Canada, joined Nov 2000, 4639 posts, RR: 36
Reply 7, posted (12 years 10 months 6 days 5 hours ago) and read 3015 times:

Afitch7881:

The A321 also has the double strobe. I believe all newer Airbus do, including A330



Word
User currently offlineSwa tpa From United States of America, joined Aug 2001, 1560 posts, RR: 34
Reply 8, posted (12 years 10 months 5 days 21 hours ago) and read 2962 times:

The flashing landing lights on our 737's seem to have a setting to use the flashers or not. I was working the gate the other morning and they towed an originator over with regular landing lights on and when the pilots arrived and began checking things out and doing the walk around the landing lights were flashing so who knows how many we have with that option that just are not being used half the time.


I believe I can fly.....
User currently offlineHlywdCatft From United States of America, joined Jan 2001, 5321 posts, RR: 6
Reply 9, posted (12 years 10 months 5 days 21 hours ago) and read 2956 times:

The A340 also has a double strobe. I noticed it on a departing Lufthansa A340 at the DTW the other day.

In fact I think all Airbuses have the double strobe. I was quite sure I remember A300s and A310s of Fed Ex having them when I used to see them early in the morning landing at DTW.

The DC-10 almost appears as if it has a triple flashing strobe, but yeah there are seperate strobes on the wings.

About a week ago I did a post on coolest aircraft lighting.

As for the Southwest dimming on and off landing lights that is a frequent topic that is discussed.

Yes many buiz jets have that feature. I think West Jet has it on their 737s because I thought they inherited them from Southwest.

I have seen two other aircraft use a dimming on/off landing light before. I have occassionaly seen the Mesaba Saab 340s do it. Believe it or not, once I even saw a Northwest DC-10 -30/40 do it on approach, but that might have been a problem with its lights.


User currently offlineLMML 14/32 From Malta, joined Jan 2001, 2565 posts, RR: 6
Reply 10, posted (12 years 10 months 5 days 20 hours ago) and read 2948 times:

Are you talking about the wing tip strobe lights or the landing lights at the wing root?

User currently offlineWjv04 From Canada, joined Jun 2001, 584 posts, RR: 4
Reply 11, posted (12 years 10 months 5 days 20 hours ago) and read 2946 times:

I heard from westjet 737-200 pilots, that they were designed to accually scare birds away during takeoff and landing. This technology was retrofitted to the aircraft, and proved to work quite well.


User currently offlineATA L1011 From United States of America, joined Feb 2001, 1392 posts, RR: 6
Reply 12, posted (12 years 10 months 5 days 13 hours ago) and read 2906 times:

The Tristar has double strobes as well on the wing, and I have noticed the doudle blink on the DC-10. It just appears that way from the front although it is just the front and rear anti blinking almost simuetaneously that causes that.


Treat others as you expect to be treated!
User currently offlineRedngold From United States of America, joined Mar 2000, 6907 posts, RR: 44
Reply 13, posted (12 years 10 months 5 days 13 hours ago) and read 2906 times:

Check out my landing lights page for a little info on this:

http://www.geocities.com/bandimal/airports/kcle/lights.html"

I've seen those "soft strobes" on WN 732's and 733's; also on a few private jets here at KCLE. It looks sort-of like a dance to me.  Smile

I always know an Airbus by the double strobe on the wingtips.

redngold



Up, up and away!
User currently offlineRolex01 From , joined Dec 1969, posts, RR:
Reply 14, posted (12 years 10 months 5 days 13 hours ago) and read 2901 times:

It seems to me on very low visibility days you wouldnt want to use the flashers. I mean, wouldnt you need all the light you can get from your higher intensity light option? I mostly only see them flashing on decent visibility days.



User currently offlineFlightSimFreak From United States of America, joined Oct 2000, 720 posts, RR: 0
Reply 15, posted (12 years 10 months 5 days 12 hours ago) and read 2888 times:

I thought that, along with the above mentioned things, the main purpose of the flashing landing lights was to save on bulb live.

User currently offlineAWspicious From , joined Dec 1969, posts, RR:
Reply 16, posted (12 years 10 months 5 days 7 hours ago) and read 2865 times:

As a spotter who relies on the strobe flashing pattern to identify many aircrafts, I can confirm many airbus planes have the double flash wing tip strobe. There are exceptions, however (based on my observations at YYZ).
Many (if not most) A 319, 320, 321, 330, and, 340s have the double flash strobes. Now, I say most because Skyservice's A330 (C F-BUS) for example, does not have the wing tip strobes. I've also observed some other AirCanada airbus planes without the wing tip strobes. Not many, though.
The A300s flown by FedEx do not. They flash from side to side. Same with the ICC A300.
Personally, I really like the strobe pattern of the 777. I find it dramatic. It give an ominous impression, i find. And, they're soooo bright! I love it when the British Airways 777s are in town.
That's my impression. Thanks for reading.

aw


User currently offlineRyefly From United States of America, joined Jun 2000, 1396 posts, RR: 0
Reply 17, posted (12 years 10 months 5 days 6 hours ago) and read 2855 times:

I have seen many US Airways commuter planes with flashing landing lights the same way as the Southwest 737's.

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