QANTASforever
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That Orange Thing On BA 737-800s?

Sun May 13, 2007 7:57 am

Sorry for the extremely vague title and question. But what on earth is that orange-yellow square thing BA has painted (?) on the forward section of the fuselage of their 737-800s?

Here is a picture:


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Photo © Sergio Domingos



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Shamrock_747
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RE: That Orange Thing On BA 737-800s?

Sun May 13, 2007 8:06 am

British Airways doesn't own or operate any Boeing 737-800 aircraft. The aircraft pictured (G-OXLA) is operated by Excel Airways on behalf of BA franchise GB Airways on a temporary basis, hence the rather unfortunate poorly applied colours.

The yellow area is part of the aircraft's previous livery which has not been properly covered.
 
vv701
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RE: That Orange Thing On BA 737-800s?

Sun May 13, 2007 9:58 am

Quoting Shamrock_747 (Reply 1):
The yellow area is part of the aircraft's previous livery which has not been properly covered.

Yes. It is part of the cheat line of Miami Air's colours:

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Photo © Peter Tonna


Although this aircraft is operated by Miami Air in the winter season, there are no photos of it with its US registration and in Miami Air colours. However it has been frequently photographed in the above colours which are Basic Miami Air colours with XL Airways titles.

One question is why was this small area not painted? What is there about a 738 that makes this difficult? Is it an area of composite surrounded by metal paneling? Whatever the reason why the BA titles are not in the correct place on the forward lower fuselage is clearly that whoever repainted the aircraft could not paint them over the yellow bit.
 
BrianDromey
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RE: That Orange Thing On BA 737-800s?

Sun May 13, 2007 10:11 am

I think this is a credible explination....

I think that the area mentioned is where teh "ptiot tubes" are located on the 737NG. On this a/c they are some kind of sensor, whcih is flush with the skin of the a/c. If you look, it is possibke to see a bare metal pannel rise above teh cheat line. I guess that area is pretty sensitive to paint, and it was easieer/quicker/cheaper to leave it as it was than do a full paint job on it.

Brian.
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OPNLguy
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RE: That Orange Thing On BA 737-800s?

Sun May 13, 2007 10:32 am

Quoting VV701 (Reply 2):
Yes. It is part of the cheat line of Miami Air's colours:



Quoting BrianDromey (Reply 3):
I think this is a credible explination....

I think that the area mentioned is where teh "ptiot tubes" are located on the 737NG.

You're both correct, but that circular bare metal area adjacent to the gold paint/decal from the previous color scheme is actual a static port, and not a pitot tube (those are located further forward on the nose.) When it comes to pitot tubes and static ports, think in terms of engine intake and engine exhaust, respectively. The ports have to kept clean, and clear of anything that would disturb the airflow moving past them.

See: http://www.b737.org.uk/probes.htm and scroll down for the probes/ports for the NG series...

[Edited 2007-05-13 03:36:37]
ALL views, opinions expressed are mine ONLY and are NOT representative of those shared by Southwest Airlines Co.
 
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jetmech
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RE: That Orange Thing On BA 737-800s?

Sun May 13, 2007 10:44 am

Quoting BrianDromey (Reply 3):
I guess that area is pretty sensitive to paint,

I haven't worked on a 737 for a while, but the round area inside the non painted region looks like a static port. As you mentioned, the port itself and the surrounding area has to be very clean and free from contamination, so it was probably easier to leave it as is instead of repainting. Airbus have a similar setup on the sides of the A330 / A340.


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Photo © Cees de Krijger



In-line with the bottom edge and about 6 feet behind the cargo door is a red rectangular outline. Inside that rectangular area are three circular objects which are static ports. The bottom of the cargo door has bulged fairings. IIRC, the absence of these fairings is a no-go MEL item as the airflow over the static ports will be changed. The two objects inside the red circles in front of the cargo door are AOA sensors. We keep a spare AOA sensor on hand in case one gets bent during cargo handling operations.

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DL_Mech
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RE: That Orange Thing On BA 737-800s?

Sun May 13, 2007 12:10 pm

Quoting VV701 (Reply 2):
One question is why was this small area not painted?

They probably didn't want to do another skin waviness check around the static ports. This is required for RVSM ops.
This plane is built to withstand anything... except a bad pilot.
 
GatwickA320
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RE: That Orange Thing On BA 737-800s?

Sun May 13, 2007 8:59 pm

I work on this exact aircraft right now as crew and we were wondering the same thing. Thanks for your information.

Incidentally, does anyone have any decals kicking around to give the tail that '3D' effect? Big grin