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Boeing 737 "Bright Light" Question(s)  
User currently offlineSXDFC From United States of America, joined Dec 2007, 2389 posts, RR: 22
Posted (6 years 1 month 1 week 3 days 16 hours ago) and read 9088 times:

Yesterday as I was outside, I noticed a WN 73NG on approach, and as he made a turn I noticed the pilot putting on a "bright light" near the engine- I knew it wasn't the landing lights as this light was on the side of the aircraft its self. Here is a photo as an example :


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Photo © Paul Leach - New England Airports



The light that is in question is the bright one under neath the 6th window. Also it was a lot brighter. I also would like to know why this light is turned on during the approach?


Side note as well, since this plane was a 73NG I noticed that the "logo lights" were not turned on, is that the pilots choice or do certain rules apply to that as well?


ALL views, opinions expressed are mine ONLY and are NOT representative of those shared by Southwest Airlines Co.
36 replies: All unread, showing first 25:
 
User currently offlineEMBQA From United States of America, joined exactly 11 years ago today! , 9364 posts, RR: 11
Reply 1, posted (6 years 1 month 1 week 3 days 15 hours ago) and read 9086 times:

Wing Ice Inspection Light....it's not limited to the 737... many if not all aircraft have them.

Not all aircraft have logo lights installed....

[Edited 2008-09-14 16:07:58]


"It's not the size of the dog in the fight, but the size of the fight in the dog"
User currently offlineA10WARTHOG From United States of America, joined Jul 2004, 325 posts, RR: 0
Reply 2, posted (6 years 1 month 1 week 3 days 13 hours ago) and read 9026 times:



Quoting SXDFC (Thread starter):
Side note as well, since this plane was a 73NG I noticed that the "logo lights" were not turned on, is that the pilots choice or do certain rules apply to that as well?

As stated above some do not have logo lights. Some airlines have deactivate the logo lights to cut down on cost. The EMB-145 the logo light, work good as work light when working on the APU. But they are not much fun to change.


User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 3, posted (6 years 1 month 1 week 3 days 6 hours ago) and read 8940 times:

The correct term is "Wing illumination Light"
As Implied...it illuminated the LE of the Wing to enable Ice detection visually.

Logo lights may not be installed on all B737.some operators deactivate it since its not a mandatory requirement for airworthiness....Helps bring down the costs too.

regds
MEL



Think of the brighter side!
User currently offlineIFixPlanes From Germany, joined Feb 2005, 239 posts, RR: 0
Reply 4, posted (6 years 1 month 1 week 3 days 5 hours ago) and read 8927 times:

Hi Mel,
you surely can you give me a AMM reference to change the "Wing illumination Light".
I din´t find it in the AMM.  confused 



never tell an engineer he is wrong ;-)
User currently offlinePilotaydin From Turkey, joined Sep 2004, 2539 posts, RR: 51
Reply 5, posted (6 years 1 month 1 week 2 days 19 hours ago) and read 8849 times:

the wing inspection light is VERY important, it helps us see the slats in the EXT and FULL EXT position if we have a LE DEVICE WARNING and it also shows us the condition of icing, on the leading edge....and it's quite hard to spot on some a/c because the inspection light isn't angled the same on all aircraft...


The only time there is too much fuel onboard, is when you're on fire!
User currently offlineMender From United Kingdom, joined Feb 2004, 240 posts, RR: 0
Reply 6, posted (6 years 1 month 1 week 2 days 16 hours ago) and read 8798 times:



Quoting Pilotaydin (Reply 5):
the wing inspection light is VERY important, it helps us see the slats in the EXT and FULL EXT position if we have a LE DEVICE WARNING and it also shows us the condition of icing, on the leading edge

I've often wondered about the use of the wing illumination light as on some aircraft, for example B757/767 I don't believe you can't see the wings from the flight deck. Wouldn't the crew have to walk back into the cabin to inspect the wing?

If this is the case would a pilot have time to do this if a LE config warning was shown?


User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 7, posted (6 years 1 month 1 week 2 days 5 hours ago) and read 8701 times:



Quoting IFixPlanes (Reply 4):

Hi Mel,
you surely can you give me a AMM reference to change the "Wing illumination Light".
I din´t find it in the AMM.

AMM 33-41-11 pg 201.
regds
MEL



Think of the brighter side!
User currently offlinePilotaydin From Turkey, joined Sep 2004, 2539 posts, RR: 51
Reply 8, posted (6 years 1 month 1 week 1 day 21 hours ago) and read 8650 times:



Quoting Mender (Reply 6):
I've often wondered about the use of the wing illumination light as on some aircraft, for example B757/767 I don't believe you can't see the wings from the flight deck. Wouldn't the crew have to walk back into the cabin to inspect the wing?

If this is the case would a pilot have time to do this if a LE config warning was shown?

if we have a LE config problem, during takeoff we would get a takeoff config horn, which is sometimes confused with the altitude bust horn (Helios crash)
and in flight when we are approaching in and we get a LE device transit light, we would normally do the checklist, and if it doesnt resolve, most checklists result in a flap 15 landing... which is about a 30% higher V ref but the autobrakes on the 737 work wonders so it's almost always covered



The only time there is too much fuel onboard, is when you're on fire!
User currently offlineWILCO737 From Greenland, joined Jun 2004, 9077 posts, RR: 76
Reply 9, posted (6 years 1 month 1 week 1 day 21 hours ago) and read 8649 times:
AIRLINERS.NET CREW
HEAD MODERATOR



Quoting Pilotaydin (Reply 8):
and if it doesnt resolve, most checklists result in a flap 15 landing... which is about a 30% higher V ref but the autobrakes on the 737 work wonders so it's almost always covered

Did that in EDI once. Was no big deal. Even with the 30% higher V ref no big deal. The 737 is a good aircraft
The good thing on the 737 was that I could see the wings from the cockpit. So this winglight is helpful to see if there is ice or if the leading edges are fully extended.
now on the MD11 I cannot even see the wingtip, no chance.

WILCO737 (MD11F)
 airplane 



It it's not Boeing, I am not going.
User currently offlineTWAL1011727 From United States of America, joined Mar 2006, 631 posts, RR: 0
Reply 10, posted (6 years 1 month 1 week 1 day 18 hours ago) and read 8617 times:

Airlines also use it for the "see and be seen" rule.

Helps make your airplane more visible to others out there.

KD


User currently offlineBoeing767mech From United States of America, joined Dec 2000, 1029 posts, RR: 3
Reply 11, posted (6 years 1 month 1 week 1 day 16 hours ago) and read 8588 times:

I have noticed the guys coming over the pond use their wing scan lights. It seems when there feet are over land they switch off the the lights. I see this everytime I walk the dog which is about 1900 hours every night. I can't see the logo but I know it is a 747. The joy of living next to the water on the east coast.

David

[Edited 2008-09-16 15:32:42]


Never under-estimate the predictably of stupidty
User currently offlineAirframeAS From United States of America, joined Feb 2004, 14150 posts, RR: 24
Reply 12, posted (6 years 1 month 1 week 1 day 16 hours ago) and read 8572 times:

Isn't it also used as a 'runway turn-off' light?

As for the logo light, that is on the horizontal stabs.



A Safe Flight Begins With Quality Maintenance On The Ground.
User currently offlineWILCO737 From Greenland, joined Jun 2004, 9077 posts, RR: 76
Reply 13, posted (6 years 1 month 1 week 1 day 16 hours ago) and read 8572 times:
AIRLINERS.NET CREW
HEAD MODERATOR



Quoting AirframeAS (Reply 12):
Isn't it also used as a 'runway turn-off' light?

The 737 has separate runway turnoff lights. They point more to the front right than directly on the wing leading edge.

WILCO737 (MD11F)
 airplane 



It it's not Boeing, I am not going.
User currently offlineBoeing767mech From United States of America, joined Dec 2000, 1029 posts, RR: 3
Reply 14, posted (6 years 1 month 1 week 1 day 15 hours ago) and read 8558 times:



Quoting AirframeAS (Reply 12):
Isn't it also used as a 'runway turn-off' light

Wing scan lights are both on or both off, Runway turn off lights are Left or Right On/Off. Aviation's form of turn signals.

David



Never under-estimate the predictably of stupidty
User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 15, posted (6 years 1 month 1 week 1 day 4 hours ago) and read 8516 times:



Quoting AirframeAS (Reply 12):
Isn't it also used as a 'runway turn-off' light?
As for the logo light, that is on the horizontal stabs.

No.Runway turn off lights are of ahigher intensity & located on the Wing LE Inboard.
On the classics its on the Wingtip focussing on the Vertical Fin.

regdss
MEL



Think of the brighter side!
User currently offlineIFixPlanes From Germany, joined Feb 2005, 239 posts, RR: 0
Reply 16, posted (6 years 1 month 1 week 21 hours ago) and read 8481 times:

@Mel
There is no "wing illumination light" at AMM 33-41-11 pb 200.
What i find there is a "Wing scanning light".

You find the "wing illumination light" at AMM 33-41-00 pb 200.



Oh Mel, when you start nitpicking like "...The correct term is...", akt like a pro and add the A/C version!

"Wing illumination Light" on a B737NG.
"Wing scanning light" on a B737CL.



never tell an engineer he is wrong ;-)
User currently offlineSXDFC From United States of America, joined Dec 2007, 2389 posts, RR: 22
Reply 17, posted (6 years 1 month 1 week 16 hours ago) and read 8445 times:



Quoting IFixPlanes (Reply 16):
"Wing illumination Light" on a B737NG.
"Wing scanning light" on a B737CL.

Well since the plane was a 73NG- I guess that means the light I saw was called the "Wing illumination light"  Wink



ALL views, opinions expressed are mine ONLY and are NOT representative of those shared by Southwest Airlines Co.
User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 18, posted (6 years 1 month 1 week 14 hours ago) and read 8421 times:

Quoting IFixPlanes (Reply 16):
Oh Mel, when you start nitpicking like "...The correct term is...", akt like a pro and add the A/C version!

nitpicking,akt,pb..ok you mean Act,pg....aka page.
But you are correct....I should def have mentioned the type.

Quoting IFixPlanes (Reply 16):
There is no "wing illumination light" at AMM 33-41-11 pb 200.
What i find there is a "Wing scanning light".

You find the "wing illumination light" at AMM 33-41-00 pb 200.

I still stand by the AMM ref in reply 7 for the B732 it is called wing illumination light & on the B737-600/700/800 its called the "wing illumination light" again with AMM ref at 33-41-00 pg 201.

Whats surprising is that you knew the reference yet asked me for it....I don't claim to be the expert in all things....But I visit this forum to share little & learn more from the rest out here.

Aviation is a Family that is very important to me. Cheers.


Are you saying the term is not "wing Illumination light"?

Quoting SXDFC (Reply 17):
Well since the plane was a 73NG- I guess that means the light I saw was called the "Wing illumination light"

 

regds
MEL...

]

[Edited 2008-09-17 17:55:23]


Think of the brighter side!
User currently offlineA10WARTHOG From United States of America, joined Jul 2004, 325 posts, RR: 0
Reply 19, posted (6 years 1 month 6 days 23 hours ago) and read 8355 times:

This is a good example that terminology can change from different model type and manufacture.
Embraer calls those same light on the ERJ "wing inspection lights". They all do the same function.


User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 20, posted (6 years 1 month 6 days 13 hours ago) and read 8289 times:



Quoting A10WARTHOG (Reply 19):

This is a good example that terminology can change from different model type and manufacture.

True.Its Amazing how a single manufacturer can have different terms for a common unit on different types.  Smile
regds
MEL



Think of the brighter side!
User currently offlineA10WARTHOG From United States of America, joined Jul 2004, 325 posts, RR: 0
Reply 21, posted (6 years 1 month 6 days 1 hour ago) and read 8225 times:

Just wait til the 787 comes out. They change a lot of the terminology.

User currently offlineBAe146QT From United Kingdom, joined Sep 2006, 996 posts, RR: 0
Reply 22, posted (6 years 1 month 5 days 22 hours ago) and read 8206 times:



Quoting HAWK21M (Reply 18):
But I visit this forum to share little & learn more from the rest out here.

I don't want to get into a group hug here, but I just want to thank you and everyone else here who bothers to share the wealth of knowledge, even when the questions are a little banal or insane*.

I saw the intent in IFixPlanes's first post - it was obvious that (s)he was about to nitpick you straight back - and it was quite funny, but also a little uncomfortable to watch because it's not nice to see someone you respect being teased like that when a balanced, reasoned correction would have been better.



* And when the answers are insane, for that matter. (I'm looking at you, 2H4)  Smile



Todos mis dominós son totalmente pegajosos
User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 23, posted (6 years 1 month 4 days 20 hours ago) and read 8113 times:



Quoting BAe146QT (Reply 22):
even when the questions are a little banal or insane*.

In Aviation...I've learnt that their is no stupid question only an question that has not been answered.  Smile
So go ahead with even the most stupidest question you think you may have & you'll be surprised & pleased with the Debate that would follow & the wealth of information that would generate......

Quoting BAe146QT (Reply 22):
I saw the intent in IFixPlanes's first post - it was obvious that (s)he was about to nitpick you straight back - and it was quite funny, but also a little uncomfortable to watch because it's not nice to see someone you respect being teased like that when a balanced, reasoned correction would have been better.

Personally I never thought it was a sarcatic comment by Ifixplanes earlier & a few posts later found it amusing....But then I guess I did answer it back as polite as I could be  Smile
My profile is not a hidden secret  wink 
I agree if a more knowledgable person in this field has some info to share/correction to make...Pls do so straight....This is why we are here....If Im wrong I'll thank you for the correction & if I'm correct,I'm glad I could clear a doubt.

On the topic...its amazing that how similiar equipment have terms so diffferent by one manufacturer & at times on a similiar model aircraft....That why we learn something everytime.

cheers.
regds
MEL



Think of the brighter side!
User currently offlinePilotaydin From Turkey, joined Sep 2004, 2539 posts, RR: 51
Reply 24, posted (6 years 1 month 4 days 19 hours ago) and read 8108 times:

back on track, we had some leading edge icing last night at FL 380 in some seriously thick stuff overhead Georgia * the country

so i flipped the wing inspection light on to see  Wink



The only time there is too much fuel onboard, is when you're on fire!
25 LASOctoberB6 : I use that light when I'm recording.. Comes in handy..!
26 HAWK21M : Recording? As in. regds MEL
27 AA737-823 : The DC-9/MD-80 series aircraft also have an engine inlet illumination light... this task is accomplished by the wing illumination light on wing-mount
28 Kris : Where is the switch for these lights? On the overhead panel with the rest of the light switches?
29 WILCO737 : Yes, next to the Beacon and strobe lights, over the head of the FO. WILCO737 (MD11F)
30 Post contains links and images HAWK21M : On the Lower RH end of P5. regds MEL
31 SXDFC : I suppose its the button that says "wing"? I believe this panel is from a NG 737 right?
32 Post contains images HAWK21M : Heres the entire P5 panel of a B737-700 Observe lower RH Corner. regds MEL
33 Boeing767mech : MEL... What is the dial in the top right hand corner of the overhead next to the audio select panel???? My 737's don't have this. David
34 Mender : My guess it's an egg timer or the combination dial to the safe ;0)
35 Arv79 : You might be right. If anyone has seen the Swiss MD-11 video by JustPlanes, there's a similar dial that the captain explains is just a timer.
36 HAWK21M : None of the B737s P5 panels I've noticed have them.But from what I've been told its a simple mechanical timer device that can be wound up. regds MEL
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