Fasteddie07
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737-900 Variances

Tue Aug 12, 2008 6:47 pm

I noticed some of the 737-900s have the extra door near the rear of the aircraft and some do not. What is the difference if any in these aircraft?
 
LY744
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RE: 737-900 Variances

Tue Aug 12, 2008 7:10 pm

More doors = more seating capacity possible, because max seating is limited by the number and type of doors, as they govern how fast an aircraft can be evacuated.

At first Boeing didn't offer the option of more/bigger doors, and 739s were limited to the same maximum seating capacity as the 738s (189 IIRC). This wasn't much of a problem for mainline airlines, since they were going to have a 2 class configuration with less seats, but holiday/charter airlines could be scared off from buying the -900. Now that the 757 is no longer in production, having an aircraft that has the same max seating as a A321 was more important for Boeing I guess.

Different door configurations is an option on many other aircraft, including the 757-200, 767, A330 etc.


LY744.
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Fasteddie07
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RE: 737-900 Variances

Tue Aug 12, 2008 7:48 pm

Is the lenght of the aircraft different?
 
LY744
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RE: 737-900 Variances

Tue Aug 12, 2008 8:08 pm



Quoting FastEddie07 (Reply 2):

No, it's the same 737-900 fuselage.


LY744.
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XT6Wagon
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RE: 737-900 Variances

Tue Aug 12, 2008 8:45 pm

The 737-900ER has the extra rear door. This is to provide extra seating capacity since most of the plain 900 in service were hitting the max seats allowed due to the exit capacity. If an airline does not wish to use the doors they can deactivate them and panel over the inside.

I am uncertain if you can still order a 900 without the extra rear doors.
 
Transpac787
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RE: 737-900 Variances

Tue Aug 12, 2008 10:53 pm



Quoting XT6Wagon (Reply 4):
I am uncertain if you can still order a 900 without the extra rear doors.

The 737-900ER is now the only 900 variant offered by Boeing. Some customers (CO) have chosen to deactivate the doors, install larger windows, and panel over them on the inside.

Although the winglets are a dead giveaway, it can otherwise be difficult to tell a 739 from a 739ER by the windows alone at CO:


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tdscanuck
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RE: 737-900 Variances

Wed Aug 13, 2008 3:03 am



Quoting FastEddie07 (Reply 2):
Is the lenght of the aircraft different?

Externally, no. However, the -900ER has a flat rear pressure bulkhead that results in a slightly longer passenger cabin.

Tom.
 
Fasteddie07
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RE: 737-900 Variances

Wed Aug 13, 2008 4:48 am

So all the new ones are coming with winglets now?
 
roseflyer
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RE: 737-900 Variances

Wed Aug 13, 2008 4:54 am



Quoting FastEddie07 (Reply 7):
So all the new ones are coming with winglets now?

Yes the 739ER has winglets as a standard feature. CO must take them with winglets preinstalled. Interestingly enough, they take their new 738s without winglets and have them installed later on because they got a good aftermarket deal to get them installed which apparently is less expensive than getting them originally installed by Boeing.
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HAWK21M
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RE: 737-900 Variances

Wed Aug 13, 2008 8:15 am



Quoting Tdscanuck (Reply 6):
Externally, no. However, the -900ER has a flat rear pressure bulkhead that results in a slightly longer passenger cabin.

Is there a pic of this Flat rear pressure bulkhead available.
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CRJ900
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RE: 737-900 Variances

Wed Aug 13, 2008 8:56 am



Quoting Tdscanuck (Reply 6):
However, the -900ER has a flat rear pressure bulkhead that results in a slightly longer passenger cabin.

Isn't it just the rear-wall galley that is 20 inches deeper, so that a half-size cart can be stowed in front of a full-size cart?
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tdscanuck
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RE: 737-900 Variances

Wed Aug 13, 2008 11:29 pm



Quoting HAWK21M (Reply 9):

Is there a pic of this Flat rear pressure bulkhead available.

There's a picture of a flat bulkhead in Reply 6 here:
http://www.airliners.net/aviation-fo...eneral_aviation/read.main/2922740/

But that's on a 727, not a 737NG. There's a schematic on slide 3 here:
http://www.boeing.com/commercial/737...edia_kit/pdf/900XMediaOverview.pdf

Quoting CRJ900 (Reply 10):
Isn't it just the rear-wall galley that is 20 inches deeper, so that a half-size cart can be stowed in front of a full-size cart?

Basically, yes. It makes the "corners" of the cabin bigger, so you can stuff more galley back there. If you don't fit the galley, you can squeak in another row of seats.

It's a little unclear if the maximum length of the cabin actually changed, but it's considerably longer along the side walls with the flat bulkhead.

Tom.
 
Valkyrie01
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RE: 737-900 Variances

Sun Aug 24, 2008 2:06 pm



Quoting Transpac787 (Reply 5):
Although the winglets are a dead giveaway, it can otherwise be difficult to tell a 739 from a 739ER by the windows alone at CO:

Well in the flightdeck there are a few changes. 900ER there is a ELT test switch , the center tank fuel pumps turns off automatic etc etc.The A/C number tells you what kind of A/C it is.
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HAWK21M
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RE: 737-900 Variances

Sun Aug 24, 2008 8:49 pm



Quoting Tdscanuck (Reply 11):
There's a picture of a flat bulkhead in Reply 6 here:
http://www.airliners.net/aviation-fo...2740/

Thats for the B727 & B747.I was looking for the B739ER.
regds
MEL
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tdscanuck
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RE: 737-900 Variances

Mon Aug 25, 2008 3:38 am



Quoting HAWK21M (Reply 13):

Thats for the B727 & B747.

I know. That's why I said:

Quoting Tdscanuck (Reply 11):
But that's on a 727, not a 737NG.

I haven't been able to find a picture of the 737NG one yet.

Tom.

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