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Boeing 737 Landing Light Question

Thu Feb 28, 2002 1:35 pm

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.

 
Boeing Nut
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RE: Boeing 737 Landing Light Question

Thu Feb 28, 2002 1:41 pm

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.
I'm not a real aeronautical engineer, I just play one on Airliners.net.
 
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ATA L1011
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RE: Boeing 737 Landing Light Question

Thu Feb 28, 2002 2:08 pm

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.
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heavymetal
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RE: Boeing 737 Landing Light Question

Thu Feb 28, 2002 2:58 pm

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.
 
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ATA L1011
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RE: Boeing 737 Landing Light Question

Thu Feb 28, 2002 3:05 pm

Well some of the 737-200's and 300's have them installed as well Heavymetal.
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nbirger
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RE: Boeing 737 Landing Light Question

Thu Feb 28, 2002 3:06 pm

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
 
afitch7881
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RE: Boeing 737 Landing Light Question

Thu Feb 28, 2002 4:28 pm

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

 
VonRichtofen
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RE: Boeing 737 Landing Light Question

Thu Feb 28, 2002 4:44 pm

Afitch7881:

The A321 also has the double strobe. I believe all newer Airbus do, including A330
 
SWA TPA
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RE: Boeing 737 Landing Light Question

Fri Mar 01, 2002 12:57 am

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.
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HlywdCatft
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RE: Boeing 737 Landing Light Question

Fri Mar 01, 2002 1:05 am

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.
 
lmml 14/32
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RE: Boeing 737 Landing Light Question

Fri Mar 01, 2002 2:10 am

Are you talking about the wing tip strobe lights or the landing lights at the wing root?
 
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wjv04
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RE: Boeing 737 Landing Light Question

Fri Mar 01, 2002 2:17 am

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.
 
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ATA L1011
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RE: Boeing 737 Landing Light Question

Fri Mar 01, 2002 8:56 am

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.
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redngold
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RE: Boeing 737 Landing Light Question

Fri Mar 01, 2002 9:06 am

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
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Guest

RE: Boeing 737 Landing Light Question

Fri Mar 01, 2002 9:23 am

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.

 
flightsimfreak
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RE: Boeing 737 Landing Light Question

Fri Mar 01, 2002 10:16 am

I thought that, along with the above mentioned things, the main purpose of the flashing landing lights was to save on bulb live.
 
AWspicious
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RE: Boeing 737 Landing Light Question

Fri Mar 01, 2002 2:49 pm

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
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Ryefly
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RE: Boeing 737 Landing Light Question

Fri Mar 01, 2002 3:35 pm

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