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Can 739s Be Modified Into 739ERs?  
User currently offlineIloveboeing From United States of America, joined Oct 2005, 803 posts, RR: 0
Posted (8 years 3 weeks 7 hours ago) and read 2547 times:

I was wondering, since the 739ER has virtually made the 739 obsolete, is Boeing able to physically convert existing 739s into 739ERs? If so, airlines like CO would be interested in doing so. Also, will the 739ER have its own code, or will it just be 739ER?

10 replies: All unread, jump to last
 
User currently offlineFlight152 From United States of America, joined Nov 2000, 3413 posts, RR: 6
Reply 1, posted (8 years 3 weeks 7 hours ago) and read 2543 times:

Quoting Iloveboeing (Thread starter):
I was wondering, since the 739ER has virtually made the 739 obsolete

Uh. No. There are plenty of routes that the 739 flys where the range of the ER model is not necessary.


User currently offlineDfwRevolution From United States of America, joined Jan 2010, 1001 posts, RR: 51
Reply 2, posted (8 years 3 weeks 7 hours ago) and read 2528 times:

Quoting Iloveboeing (Thread starter):
is Boeing able to physically convert existing 739s into 739ERs?

No, it really isn't practical. There are some significant modifications to the wings, fuselage, landing gear, engines, and pressure bulkhead that can't simply be retrofitted to the standard 737-900.

As a side note, production of the 737-900 will be consolidated to just 739ER production

Quoting Iloveboeing (Thread starter):
Also, will the 739ER have its own code, or will it just be 739ER?

Code? Boeing markets the aircraft as the 737-900/ER. Acceptable short hand would likely include -900ER or 739ER.

I'm sure individual airlines will have their own internal codes for various models, cabin configurations, subfleets, etc.


User currently offlineN328KF From United States of America, joined May 2004, 6491 posts, RR: 3
Reply 3, posted (8 years 3 weeks 5 hours ago) and read 2414 times:

You could put belly tanks in a standard 737-900, but that's about as far as you could take it. I suppose that if you were determined, you could cut two more exit doors in it. You still wouldn't have a 737-900ER, though.


When they call the roll in the Senate, the Senators do not know whether to answer 'Present' or 'Not guilty.' T.Roosevelt
User currently offlineODwyerPW From Mexico, joined Dec 2004, 896 posts, RR: 2
Reply 4, posted (8 years 3 weeks 4 hours ago) and read 2325 times:

Thus far there have only been 52 739s ordered.
Presently, there are 82 739ERs on order, with the CO conversion of other 737s pushing it to 94.

This is a real triumph for the program. Many were thinking the 737 was dead when compared to the A320, punctuated by the loss of a certain German carrier a few years back. Folks were critical of any additional rework of the 737, especially the 739 as a poor stop gap measure.

Well, A320 is still garnishing better sales (it may in fact be the better aircraft of the two), but nevertheless the 739ER has staved off a few in favor of Boeing.

I like the plane because it improves CASM. Anything done to consume less fuel when going from Point A to Point B is fine with me.



Quiero una vida simple en Mexico. Nada mas.
User currently offlineIloveboeing From United States of America, joined Oct 2005, 803 posts, RR: 0
Reply 5, posted (8 years 3 weeks 4 hours ago) and read 2318 times:

Quoting ODwyerPW (Reply 4):

Well, A320 is still garnishing better sales (it may in fact be the better aircraft of the two), but nevertheless the 739ER has staved off a few in favor of Boeing.

The 739ER is competing against the A321, rather than the A320. I believe it has more powerful engines and more range, which gives it an advantage.


User currently offlineODwyerPW From Mexico, joined Dec 2004, 896 posts, RR: 2
Reply 6, posted (8 years 3 weeks 3 hours ago) and read 2255 times:

when I said A320, I meant the Family. I was merely saying the A320 Family has enjoyed a few more sales than the 737 Family.

CFM56-7 as applied to 739ER has a thrust of 27,300
CFM56-5 as applied to A321 has a thrust of 27,000.
Lets call that a tie...dead locked.

739ER has a range of 5,925 km typical passengers of 180.
A321 has a range of 5,600 km typical passengers of 185.
Slight advantage to 739ER if you need the range. Slight advantage to A321 if you don't. Lets call that close.

A321 has an interior cabin 6" wider than 739ER. That translates into 6 wider seats in coach.
Lets call that 1 to Airbus.

A321 weighs more than 10,000lbs than the 739ER. That translates into more fuel burned.
Lets call that 1 to Boeing.

So, their pretty equal planes. However, the A321 has 639 orders. The Boeing entries, both 739/739ER, have only 146. Clearly, the airlines have shown what plane they think is the better plane in the A321 vs 739/739ER contest. Obviously the A321 has been offered longer, so order comparisons must be taken with a grain of salt.

It will be interesting to note if the 739ER will take away future A321 sales. I don't know of a means of tracking A321 orders since the 739ER has been offered. I don't know which one has faired better recently.

But to answer the thread originators question...doubtful Continental, Korean or Alaskan airlines would be able to ER their standard 739s.



Quiero una vida simple en Mexico. Nada mas.
User currently offlineCRJ900 From Norway, joined Jun 2004, 2234 posts, RR: 1
Reply 7, posted (8 years 2 weeks 6 days 17 hours ago) and read 2098 times:
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Quoting ODwyerPW (Reply 6):
CFM56-7 as applied to 739ER has a thrust of 27,300
CFM56-5 as applied to A321 has a thrust of 27,000.

The CFM56-5B offer up to 33,000lbs for the A321. I think most operators use 30,000-33,000lbs thrust, but correct me if I am wrong  Smile

As others have said, the 9ER has strengthened structures to handle the extra weight, so modifying a standard 900 will be very expensive, I guess, and not worth it.

I hope the B739ER enjoy a lot of success, perhaps it will shine as a 200-seat medium hauler... that should give it nice CASM...



Come, fly the prevailing winds with me
User currently offlineMiamiair From , joined Dec 1969, posts, RR:
Reply 8, posted (8 years 2 weeks 6 days 17 hours ago) and read 2068 times:

Quoting N328KF (Reply 3):
You could put belly tanks in a standard 737-900, but that's about as far as you could take it. I suppose that if you were determined, you could cut two more exit doors in it. You still wouldn't have a 737-900ER, though.

You're not going to be able to get the flat pressure bulkhead in either.

The answer is no.


User currently offlineJj From Algeria, joined Jun 2001, 1227 posts, RR: 2
Reply 9, posted (8 years 2 weeks 6 days 16 hours ago) and read 2026 times:

Does anyone have the numbers of A321's ordered since the launch of the 739ER?

User currently offlineCanadianNorth From Canada, joined Aug 2002, 3395 posts, RR: 9
Reply 10, posted (8 years 2 weeks 6 days 16 hours ago) and read 2012 times:

Quoting ODwyerPW (Reply 6):
when I said A320, I meant the Family. I was merely saying the A320 Family has enjoyed a few more sales than the 737 Family.

Ummm, no.

Has the A321 outsold the 739/739ER? Yes. Has the eintire A320 family outsold the entire 737 family? No.

Or did you mean specifically over the last couple years? In that case it's a pretty close race, and I'm not sure whos farther ahead on that one.



CanadianNorth



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