Sponsor Message:
Aviation Technical / Operations Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
What`s That Thing On A B737-300 (winglets)  
User currently offlineOHLHD From Finland, joined Dec 2004, 3962 posts, RR: 25
Posted (6 years 5 months 1 week 5 days 3 hours ago) and read 4065 times:

Hi, I just flew SN's B737-300 ( with Winglets) and I noticed that little thing below the wing for the first time on a B737. Can anyone please tell me what it is.

Many thanks!

What'that thing?

20 replies: All unread, jump to last
 
User currently offlineArtsyman From United States of America, joined Feb 2001, 4745 posts, RR: 34
Reply 1, posted (6 years 5 months 1 week 5 days 3 hours ago) and read 4061 times:

They are headlights. They go up and down as needed

User currently offlineAvioniker From United States of America, joined Dec 2001, 1109 posts, RR: 11
Reply 2, posted (6 years 5 months 1 week 5 days 3 hours ago) and read 4059 times:

That would be the retractable landing light.
They were relocated to the fuselage on the NG aircraft.
 

Geez Artsyman, you're quick for an ops type. . .  Silly

[Edited 2008-03-20 15:29:10]


One may educate the ignorance from the unknowing but stupid is forever. Boswell; ca: 1533
User currently offlineHAWK21M From India, joined Jan 2001, 31679 posts, RR: 56
Reply 3, posted (6 years 5 months 1 week 4 days 17 hours ago) and read 3935 times:

The Classic series [B737-100to500] had the Outboard landing lights located on the Outboard TE Flap fairings.The two Microswitches keep the Beam of light aligned to the Longitunational axis of the Aircraft irrespective of flap position.The Landing light is moved by an electric motor driving a Square threaded jackscrew.
These lights had three position...Off/Extend/On.

These were removed on the NGs and fitted ahead of the Pack doors.

regds
MEL



Think of the brighter side!
User currently offlineOHLHD From Finland, joined Dec 2004, 3962 posts, RR: 25
Reply 4, posted (6 years 5 months 1 week 4 days 16 hours ago) and read 3920 times:

Thanks for the answer, it was very helpful!  Smile

User currently offlineStarlionblue From Greenland, joined Feb 2004, 17027 posts, RR: 67
Reply 5, posted (6 years 5 months 1 week 4 days 15 hours ago) and read 3898 times:

DC-9s (and MD-8x??) also have retractable lights at the wingtips. According to a pilot I spoke to you could feel a faint vibration when they were out. Don't know if he was pulling my leg.


"There are no stupid questions, but there are a lot of inquisitive idiots."
User currently offlineNEMA From United Kingdom, joined Feb 2006, 713 posts, RR: 0
Reply 6, posted (6 years 5 months 1 week 4 days 14 hours ago) and read 3879 times:



Quoting Starlionblue (Reply 5):
According to a pilot I spoke to you could feel a faint vibration when they were out. Don't know if he was pulling my leg.

They dont really look very aerodynamic do they...i always thought they were front of the landing gear.



There isnt really a dark side to the moon, as a matter of fact its all dark!
User currently offlineIAHFLYR From United States of America, joined Jun 2005, 4790 posts, RR: 22
Reply 7, posted (6 years 5 months 1 week 4 days 12 hours ago) and read 3850 times:



Quoting NEMA (Reply 6):
They dont really look very aerodynamic do they

They also act as speed brakes since the 737''s speed brakes are such an effective item already!  biggrin   crazy 



Any views shared are strictly my own and do not a represent those of any former employer.
User currently offlineAAR90 From United States of America, joined Jan 2000, 3471 posts, RR: 47
Reply 8, posted (6 years 5 months 1 week 4 days 10 hours ago) and read 3796 times:



Quoting Starlionblue (Reply 5):
Don't know if he was pulling my leg.

No he was not. The vibrations are slight and most pax would probably not notice though.



*NO CARRIER* -- A Naval Aviator's worst nightmare!
User currently offlineAvioniker From United States of America, joined Dec 2001, 1109 posts, RR: 11
Reply 9, posted (6 years 5 months 1 week 4 days 9 hours ago) and read 3769 times:

Quoting Starlionblue (Reply 5):
According to a pilot I spoke to you could feel a faint vibration when they were out. Don't know if he was pulling my leg.

He wasn't pulling your leg. They provide enough drag that Douglas installed a system, should you lose an engine, that automatically retracts the lights.
 

[Edited 2008-03-21 09:14:07]


One may educate the ignorance from the unknowing but stupid is forever. Boswell; ca: 1533
User currently offlineOHLHD From Finland, joined Dec 2004, 3962 posts, RR: 25
Reply 10, posted (6 years 5 months 1 week 4 days 3 hours ago) and read 3675 times:

Another question: Is it standard or was it optional as I travelled 2 days later a SK 735 and I could not find it.

User currently offlineAvioniker From United States of America, joined Dec 2001, 1109 posts, RR: 11
Reply 11, posted (6 years 5 months 1 week 4 days 3 hours ago) and read 3654 times:

http://www.b737.org.uk/aircraft_general.htm#Lights

http://www.b737.org.uk/flap_farings.jpg

They're there, Probably just not extended by the crew for whatever reason, unless you were actually on a 600. . .
 Smile



One may educate the ignorance from the unknowing but stupid is forever. Boswell; ca: 1533
User currently offlineHAWK21M From India, joined Jan 2001, 31679 posts, RR: 56
Reply 12, posted (6 years 5 months 1 week 3 days 16 hours ago) and read 3576 times:



Quoting OHLHD (Reply 10):
Another question: Is it standard or was it optional as I travelled 2 days later a SK 735 and I could not find it.

Probably retracted.

If the Landing lights gets stuck in the Extended position there is a CDL release item but with some penalty,because of the drag induced.

regds
MEL



Think of the brighter side!
User currently offlineOHLHD From Finland, joined Dec 2004, 3962 posts, RR: 25
Reply 13, posted (6 years 5 months 1 week 2 days 7 hours ago) and read 3442 times:



Quoting Avioniker (Reply 11):

I travelled a DY B733 from OSL to TRD and a SK B735 TRD-BOO-TOS and on both flights I did not see them.

Quoting HAWK21M (Reply 12):

Many thanks for the ansmwers.  Smile

If interested here is the trip report.

Back To The North SN,DY And SK Pics/Vids (by OHLHD Mar 21 2008 in Trip Reports)


User currently offlinePanserbjorne From Malaysia, joined Mar 2008, 7 posts, RR: 0
Reply 14, posted (6 years 5 months 4 days 11 hours ago) and read 3188 times:



Quoting HAWK21M (Reply 12):
If the Landing lights gets stuck in the Extended position there is a CDL release item but with some penalty,because of the drag induced.

Correction,it is as per MEL,not CDL,we use CDL to despatch aircraft with missing items,whereas MEL is to despatch with unserviceable item. And the fuel penalty for flying with landing light stucked in extended position is 1%.


User currently offline2H4 From United States of America, joined Oct 2004, 8955 posts, RR: 60
Reply 15, posted (6 years 5 months 4 days 10 hours ago) and read 3175 times:
AIRLINERS.NET CREW
DATABASE EDITOR



Quoting Panserbjorne (Reply 14):
And the fuel penalty for flying with landing light stucked in extended position is 1%.

Is that 1% indicative of the actual increase in fuel burn, or is it more of a broad figure that makes up for the increase and then some?

Also, can a 737 with a stuck landing light be operated in known icing conditions? I would imagine there's a potential for quite the ice chunk to build up.

2H4



Intentionally Left Blank
User currently offlineTdscanuck From Canada, joined Jan 2006, 12709 posts, RR: 80
Reply 16, posted (6 years 5 months 3 days 23 hours ago) and read 3070 times:



Quoting 2H4 (Reply 15):
Also, can a 737 with a stuck landing light be operated in known icing conditions? I would imagine there's a potential for quite the ice chunk to build up.

As far as I know, yes. Even if you did get a big chunk of ice on the landing light, it's not going to harm anything when it comes loose because there's nothing to hit. It's behind the engine and below the tail.

Tom.


User currently offlineMir From United States of America, joined Jan 2004, 21565 posts, RR: 55
Reply 17, posted (6 years 5 months 3 days 22 hours ago) and read 3066 times:



Quoting Tdscanuck (Reply 16):
As far as I know, yes. Even if you did get a big chunk of ice on the landing light, it's not going to harm anything when it comes loose because there's nothing to hit. It's behind the engine and below the tail.

Plus, I would think that turning the light on would generate enough heat to melt it off.

-Mir



7 billion, one nation, imagination...it's a beautiful day
User currently offlinePanserbjorne From Malaysia, joined Mar 2008, 7 posts, RR: 0
Reply 18, posted (6 years 5 months 3 days 16 hours ago) and read 3029 times:



Quoting 2H4 (Reply 15):
s that 1% indicative of the actual increase in fuel burn, or is it more of a broad figure that makes up for the increase and then some?

Also, can a 737 with a stuck landing light be operated in known icing conditions? I would imagine there's a potential for quite the ice chunk to build up.

No the 1% is not the actual increase,it's somehow rather calculated by Boeing,1% for each extended light.
And about the icing condition,there is no other operational limitation other than this 1% of fuel burn,don't ask me how I know,Boeing says this,that flying a B737 with an extended landing lights to a known icing condition is allowed. And trust me,I have deferred this defect so many times,as per the MEL..  Wink


User currently offlineHAWK21M From India, joined Jan 2001, 31679 posts, RR: 56
Reply 19, posted (6 years 5 months 3 days 15 hours ago) and read 3023 times:



Quoting Panserbjorne (Reply 14):
Correction,it is as per MEL,not CDL,we use CDL to despatch aircraft with missing items,whereas MEL is to despatch with unserviceable item. And the fuel penalty for flying with landing light stucked in extended position is 1%.

The CDL also indicates the Penalty faced.

regds
MEL



Think of the brighter side!
User currently offlineAirframeAS From United States of America, joined Feb 2004, 14150 posts, RR: 24
Reply 20, posted (6 years 5 months 3 days 2 hours ago) and read 2955 times:



Quoting Mir (Reply 17):
Plus, I would think that turning the light on would generate enough heat to melt it off.

You are correct. Those lamps are pretty hot. You can get a nasty burn if you touch them on the ground.



A Safe Flight Begins With Quality Maintenance On The Ground.
Top Of Page
Forum Index

Reply To This Topic What`s That Thing On A B737-300 (winglets)
Username:
No username? Sign up now!
Password: 


Forgot Password? Be reminded.
Remember me on this computer (uses cookies)
  • Tech/Ops related posts only!
  • Not Tech/Ops related? Use the other forums
  • No adverts of any kind. This includes web pages.
  • No hostile language or criticizing of others.
  • Do not post copyright protected material.
  • Use relevant and describing topics.
  • Check if your post already been discussed.
  • Check your spelling!
  • DETAILED RULES
Add Images Add SmiliesPosting Help

Please check your spelling (press "Check Spelling" above)


Similar topics:More similar topics...
What's That On The Concorde Tail? posted Mon May 5 2003 22:37:48 by Bio15
What Is That Noise On The 727-200 posted Sun Jun 18 2000 21:29:04 by Nasmal
VH-VUN - What's That? posted Tue Jan 29 2008 14:23:55 by Springbok747
Is This Normal On A B737-600? ( Video) posted Fri Dec 21 2007 17:23:25 by OHLHD
What Is This On Every Window? posted Sun Dec 16 2007 17:32:49 by Hmmmm...
Usage Of Center Tanks On B737 posted Tue Dec 12 2006 18:21:15 by A300605R
What Reg Was I On: Delta 1855 On August 7th posted Wed Aug 16 2006 19:54:21 by DLX737200
What's This Noise On Landing In A 777 posted Mon Aug 7 2006 03:59:39 by UAL747
What's This Thing Near The Nosewheel? posted Thu Jul 20 2006 12:42:54 by Varig767
What Is Wrong On This Finnair A340? posted Tue Jul 18 2006 21:36:41 by Lufthansi
What's This Thing Near The Nosewheel? posted Thu Jul 20 2006 12:42:54 by Varig767

Sponsor Message:
Printer friendly format