INFINITI329
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737MAX Door

Mon Jul 15, 2013 11:12 pm

One of the biggest requests I hear for 737MAX is adding power assisted doors similar to what the A320 has. Can the design feature be easily incorporated into the existing design or will it require more tweaking of the fuselage shell?
 
chuchoteur
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RE: 737MAX Door

Tue Jul 16, 2013 12:35 pm

... I presume you mean sliding vs pivoting doors?
 
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Stitch
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RE: 737MAX Door

Tue Jul 16, 2013 1:39 pm

Quoting chuchoteur (Reply 1):
... I presume you mean sliding vs pivoting doors?

The A320 does have pivoting doors.

Per 320tech in Airbus Door Question (by Flyboy80 Sep 3 2004 in Tech Ops), the A320 passenger doors contain a torsion bar which provides a counterbalancing force to help lift the door, requiring less than 35 pounds of force be applied to lift it up and out.

I believe that 737 doors do not have any type of assist and require significantly more effort on the part of the person opening them.
 
AA737-823
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RE: 737MAX Door

Tue Jul 16, 2013 9:26 pm

Quoting Stitch (Reply 2):
I believe that 737 doors do not have any type of assist and require significantly more effort on the part of the person opening them.

Hey, Stitch.
The 737 does, indeed, have assist built in to the L1 door.
It's obviously still a bit difficult to operate, but the assist is there.
And it's completely mechanical- no power source required.

Quoting Stitch (Reply 2):
The A320 does have pivoting doors.

I guess it's a matter of clarification, but to suggest that the A320 and 737 have the same type of door is clearly flawed.
The A320 does not require that the door be spun ("pivoted") 180 degrees, as the 737 does.
 
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1337Delta764
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RE: 737MAX Door

Tue Jul 16, 2013 9:51 pm

I personally think a better term for the 737 door would be "swing out", while the Airbus/777/787 doors are "slide out".
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ArmitageShanks
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RE: 737MAX Door

Tue Jul 16, 2013 11:07 pm

Quoting AA737-823 (Reply 3):
And it's completely mechanical- no power source required.

How does it work? Springs? Some other sort of tension system?
 
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1337Delta764
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RE: 737MAX Door

Tue Jul 16, 2013 11:13 pm

As far as I know, the only Boeing aircraft to ever have power-assisted doors was the 767 with its slide-up doors, and typically it was only on the 1L and 2L doors (the latter only on 764ERs and 763(ER)s equipped with doors forward of the wings).
The Pink Delta 767-400ER - The most beautiful aircraft in the sky
 
SXDFC
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RE: 737MAX Door

Wed Jul 17, 2013 5:23 am

Is it true that if the 737's door were to be re-introduced in 2013 that the FAA would not pass the design?
ALL views, opinions expressed are mine ONLY and are NOT representative of those shared by Southwest Airlines Co.
 
AA737-823
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RE: 737MAX Door

Wed Jul 17, 2013 6:46 am

Quoting ArmitageShanks (Reply 5):
How does it work? Springs? Some other sort of tension system?

Indeed, a spring wrapped around the tower shaft inside the frame of the aircraft, rather than inside the door.
Incidentally, your username cracks me up every time I see it.

Quoting SXDFC (Reply 7):
Is it true that if the 737's door were to be re-introduced in 2013 that the FAA would not pass the design?

That's my strong understanding.
The funny thing is that people think the L1 door is difficult; it's nothing compared to the R1!!
 
SXDFC
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RE: 737MAX Door

Wed Jul 17, 2013 9:38 pm

Quoting AA737-823 (Reply 8):
The funny thing is that people think the L1 door is difficult; it's nothing compared to the R1!!

I have operated all service doors on the B737, and I most defiantly agree..
ALL views, opinions expressed are mine ONLY and are NOT representative of those shared by Southwest Airlines Co.
 
flyboy80
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RE: 737MAX Door

Mon Jul 22, 2013 12:25 am

I would say that the 2R door is more difficult to close then anyone of them.

How did the 727 door compare, Its exactly the same, even though older, as the 1L 737 door correct? I believe the doors my airline uses in the training department, in Atlanta  , are 727 doors, as they look nothing like the 737-300 or 737-800 doors, possibly could be 737-200 doors.
 
WNCrew
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RE: 737MAX Door

Mon Jul 22, 2013 4:32 am

Quoting flyboy80 (Reply 10):

I would say that the 2R door is more difficult to close then anyone of them.

R2 and L2 are the easiest by far... they are perfectly balanced and centered. In fact, they're directly across form one another. They require NO force really. The R1 on the other hand is further forward than the L1 and you not only push it out but also UP a bit. R1 is definitely the hardest to close (this coming from a line-flying FA and a trainer)
ALL views, opinions expressed are mine ONLY and are NOT representative of those shared by Southwest Airlines Co.
 
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HAWK21M
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RE: 737MAX Door

Tue Jul 23, 2013 10:19 am

Quoting 1337Delta764 (Reply 6):
As far as I know, the only Boeing aircraft to ever have power-assisted doors was the 767 with its slide-up doors

The B757 Doors had a power assist pneumatic operated doors too as an option.The charged nitrogen cylinder operated a chain link that operated the hinge of the door.
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