LY744 From Canada, joined Feb 2001, 5536 posts, RR: 11 Reply 1, posted (4 years 9 months 2 weeks 1 day ago) and read 2607 times:
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.
XT6Wagon From United States of America, joined Feb 2007, 3132 posts, RR: 4 Reply 4, posted (4 years 9 months 2 weeks 23 hours ago) and read 2568 times:
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 From United States of America, joined Jul 2007, 3139 posts, RR: 14 Reply 5, posted (4 years 9 months 2 weeks 21 hours ago) and read 2532 times:
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:
FastEddie07 From United States of America, joined May 2007, 243 posts, RR: 0 Reply 7, posted (4 years 9 months 2 weeks 15 hours ago) and read 2471 times:
RoseFlyer From United States of America, joined Feb 2004, 8746 posts, RR: 52 Reply 8, posted (4 years 9 months 2 weeks 15 hours ago) and read 2469 times:
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.
If you have never designed an airplane part before, let the real designers do the work!
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.
Valkyrie01 From United States of America, joined Mar 2007, 72 posts, RR: 0 Reply 12, posted (4 years 9 months 3 days 6 hours ago) and read 2022 times:
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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