Viscount724
Topic Author
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B737 Wheel Well Photo Questions

Fri Jan 02, 2009 9:04 pm

The annual Aviation Week photography issue two weeks ago includes the following photo identified as being a Boeing 737 wheel well.



Appears to have been taken with a wide-angle lens. It doesn't say whether that's the nose gear or main gear well. I'm assuming it's the nose gear well? Where is left/right/front/rear in that photo is it's not very clear?

Also, just curious if anyone can identify the larger objects visible in the photo, for example the white/gray canister-type object near the lower right, and a similar item near left center (and one one behind it). They look like motors.

And what is the rod/tube with the red and black stripes on the right side of the photo, and the green tubular object to its left?
 
EMBQA
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RE: B737 Wheel Well Photo Questions

Fri Jan 02, 2009 9:14 pm

Its the LH main gear well... looking towards the RH gear well... if you look you can see the RH gear.
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OPNLguy
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RE: B737 Wheel Well Photo Questions

Fri Jan 02, 2009 11:00 pm

This will probably be helpful to you....

http://www.b737.org.uk/wheelwell.htm#Components
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Viscount724
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RE: B737 Wheel Well Photo Questions

Fri Jan 02, 2009 11:27 pm



Quoting OPNLguy (Reply 3):
This will probably be helpful to you....

http://www.b737.org.uk/wheelwell.htm...nents

Thanks. That answers my questions.
 
roseflyer
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RE: B737 Wheel Well Photo Questions

Sat Jan 03, 2009 12:48 am

This is the main wheel well on the 737.

Lower Right is the Standby hydraulic system Reservoir.

Middle top is the B hydraulic system Reservoir

Left is the A hydraulic system Reservoir.

Orange and black tube is the torque tube that carries the torque to the flaps. Be careful around it because if you get a limb or hair caught in it, then it will easily rip it off when the flaps move.

The visible strut is for the Right main landing gear.

The long white rods and assembly on the far left is affectionately called the Christmas Tree which holds the cables and control for actuators moving surfaces on the wing.

Most of the small silver items are various control valves, fuses, filters, electric pumps and various other devices. The majority of the items in the wheel well are for the hydraulic and flight control systems.

[Edited 2009-01-02 16:52:50]
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HAWK21M
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RE: B737 Wheel Well Photo Questions

Sat Jan 03, 2009 2:42 pm



Quoting Viscount724 (Thread starter):
It doesn't say whether that's the nose gear or main gear well.

Thats the MWW ,looking from the LH side.

Quoting Viscount724 (Thread starter):
Where is left/right/front/rear in that photo is it's not very clear

The RH side is the Aft end of the MWW.

Quoting Viscount724 (Thread starter):
And what is the rod/tube with the red and black stripes on the right side of the photo, and the green tubular object to its left?

thats the TE flaps Torque tube.the Red/black stripes are an SB,to indicate that the Torque tube is turning,& to avoid hair entanglement or injury.

regds
MEL
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MD11Engineer
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RE: B737 Wheel Well Photo Questions

Sat Jan 03, 2009 3:12 pm

It is a picture taken from the LH side towards the right of the main wheel well of a B737NG (note: missing standby hydraulic pump on the keelbeam and missing brake accumulator on the rear bulkhead).

Starting on the left of the picture, you'lll see the LH aileron input torque tube and the two aileron PCUs. Beneath them is the "A" system electric motor driven hydraulic pump. Then follows the "A" hydraulic reservoir hanging from the ceiling (the big white cylinder). Beneath it is the "B" system electric motor driven hydraulic pump. On the keelbeam on the left is the power transfer unit (PTU) for the autoslat system (the cylindrical piece, where the two green pipes from the bottom go to).
Far back (still left) you can see the "B" system hydraulic reservoir. In the center rear of the picture there is the RH MLG uplock hanging from the ceiling.
Going to the rear right of the picture in the upper far corner of the wheel well you can see the flap switch and valve module, which controls the flap drive (the green cylindrical piece from which the orange/black flap torque tubes run to the flap jackscrews). Above the flap drive module, there are the two brake metering valves (which on a B737NG are usually leaking). Below the flap drive on the keelbeam is the standby hydraulic reservoir.
In the lower RH corner of the picture you'll see the standby hadraulic module, which contains the pressure filter of the standby hydraulic pump and the flight control shutoff valves for the standby system.
Mounted on the ceiling there are several valves of the brake system, like the autobrake and parking brake valves and the slat module (where you lockout the slats if you want to open the engine C-ducts)

The purple cylinders (like the ones on the keelbeam) are hydraulic fuses.

Jan
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