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Differences Between B767-300 Vs. -400?  
User currently offlineCDreier From United States of America, joined Feb 2006, 68 posts, RR: 0
Posted (8 years 2 months 4 days 18 hours ago) and read 4221 times:

I'm sure the differences must be subtle, but could someone tell me in a nutshell what makes the Boeing 767-400 different from the 300 series? Thanks.

21 replies: All unread, jump to last
 
User currently offlineEMBQA From United States of America, joined Oct 2003, 9364 posts, RR: 11
Reply 1, posted (8 years 2 months 4 days 17 hours ago) and read 4216 times:

Ahh, length.............!! The -400 also has a re-designed wing that is more aerodynamic.

[Edited 2006-07-20 02:01:05]


"It's not the size of the dog in the fight, but the size of the fight in the dog"
User currently offlineDeltaGuy From , joined Dec 1969, posts, RR:
Reply 2, posted (8 years 2 months 4 days 17 hours ago) and read 4208 times:

The -400's cockpit differs from the -300 in that the main instrument panel is of 777 design, but retains the same pedistal, autopilot, and overhead. All in all the cockpit is very nice...to the casual observer it looks like a 777.

DeltaGuy


User currently offlineVikkyvik From United States of America, joined Jul 2003, 10034 posts, RR: 26
Reply 3, posted (8 years 2 months 4 days 15 hours ago) and read 4173 times:
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The -400 also has raked wingtips, which is an easy way to identify it:

-300:


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Photo © Luc Verkuringen



-400:


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Photo © Guy Daems - Brussels Aviation Photography



~Vik



"Two and a Half Men" was filmed in front of a live ostrich.
User currently offlineDl_mech From United States of America, joined Feb 2000, 1952 posts, RR: 9
Reply 4, posted (8 years 2 months 4 days 13 hours ago) and read 4155 times:

-B8F engines
777 Wheels/Brakes
777 Packs
Improved Pneumatic System



This plane is built to withstand anything... except a bad pilot.
User currently offlinePJFlysFast From United States of America, joined May 2006, 463 posts, RR: 1
Reply 5, posted (8 years 2 months 4 days 13 hours ago) and read 4150 times:

Very cool facts guys!

User currently offlineLitz From United States of America, joined Dec 2003, 1765 posts, RR: 0
Reply 6, posted (8 years 2 months 4 days 3 hours ago) and read 4068 times:
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764 also has the "nonglitch" electrical cutover when switching off ground power or APU to engine power. 763's and older you'll see the lights flicker, PA cut off, etc. 764 does this seemlessly.

Most 763's also don't have a door 2L/2R just before the wing (although it was an orderable option), all 764's do.

- litz


User currently offlineCDreier From United States of America, joined Feb 2006, 68 posts, RR: 0
Reply 7, posted (8 years 2 months 3 days 19 hours ago) and read 3996 times:

Great info. Thanks guys!

User currently offlineGigneil From United States of America, joined Nov 2002, 16347 posts, RR: 84
Reply 8, posted (8 years 2 months 3 days 13 hours ago) and read 3947 times:

Quoting EMBQA (Reply 1):
The -400 also has a re-designed wing that is more aerodynamic.

Well. It has the wingtips. Otherwise the shape of the wing is the same.

N


User currently offlineHorizonGirl From Canada, joined Mar 2005, 807 posts, RR: 15
Reply 9, posted (8 years 2 months 2 days 14 hours ago) and read 3848 times:

Quoting Litz (Reply 6):
763's and older you'll see the lights flicker,

All the 763s I've been on, the lights just go out rather than flicker.
Is this normal for older 767s, or was this something particular to AC?


Devon



Flying high on the Wings of the Great Northwest!
User currently offlineLitz From United States of America, joined Dec 2003, 1765 posts, RR: 0
Reply 10, posted (8 years 2 months 2 days 14 hours ago) and read 3840 times:
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Quoting HorizonGirl (Reply 9):
All the 763s I've been on, the lights just go out rather than flicker.
Is this normal for older 767s, or was this something particular to AC?

Normal for pretty much anything "older" ... the 764, 777 (and some of the newer 737-700-800-900) have a "seemless" power crossover.

Older planes have the airplane equivalent of a knife switch ... you plug in ground power, and switch it over. Depending on how fast they switch it (and whether or not the ground power trips off) you'll get a flicker or an outright power outage. Often, if the outage lasts long enough, you'll get to see an unintended test of the emergency lighting system ....  biggrin 

The newer planes do it electronically, so there's no blackout when the power switches.

Now mind you, I was on a 764 once that lost ground power AFTER switchover ... that's one dark, dark, dark airplane at night ...  Smile

- litz


User currently offlineHorizonGirl From Canada, joined Mar 2005, 807 posts, RR: 15
Reply 11, posted (8 years 2 months 2 days 12 hours ago) and read 3832 times:

Quoting Litz (Reply 10):

Makes sense!
Thank you very much.


Devon



Flying high on the Wings of the Great Northwest!
User currently offlineHa763 From United States of America, joined Jan 2003, 3660 posts, RR: 5
Reply 12, posted (8 years 2 months 2 days 8 hours ago) and read 3814 times:
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Don't forget about the windows. The -400 has the same windows as the 777. You can see the difference by looking at the CO and AA pictures in post number 3.

User currently offlineHA_DC9 From United States of America, joined Jul 1999, 653 posts, RR: 1
Reply 13, posted (8 years 2 months 1 day 15 hours ago) and read 3770 times:

The -400 is also a little bit taller to compensate for the longer fuselage.

User currently offlineDl757md From United States of America, joined May 2004, 1562 posts, RR: 16
Reply 14, posted (8 years 2 months 1 day 3 hours ago) and read 3739 times:

Quoting HA_DC9 (Reply 13):
The -400 is also a little bit taller to compensate for the longer fuselage.

Which is achieved by using the main gear struts from the 777. It's probably the easiest way to ID a 764 from a distance. If it looks like the rear end is jacked then it's a 764.

DL757Md



757 Most beautiful airliner in the sky!
User currently offlineN231YE From , joined Dec 1969, posts, RR:
Reply 15, posted (8 years 1 month 4 weeks 1 day 15 hours ago) and read 3653 times:

Also not mentioned...777 Style Interior, containing improved ergonomics, and a more "open" atmosphere.

User currently offlineHa763 From United States of America, joined Jan 2003, 3660 posts, RR: 5
Reply 16, posted (8 years 1 month 4 weeks 1 day 11 hours ago) and read 3633 times:
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Quoting N231YE (Reply 15):
Also not mentioned...777 Style Interior, containing improved ergonomics, and a more "open" atmosphere.

This is available on all 767s, not just the -400. Basically, all 767s ordered after 2000 have the Boeing Signature Interior.


User currently offlineN231YE From , joined Dec 1969, posts, RR:
Reply 17, posted (8 years 1 month 4 weeks 20 hours ago) and read 3595 times:

Quoting Ha763 (Reply 16):
This is available on all 767s, not just the -400. Basically, all 767s ordered after 2000 have the Boeing Signature Interior.

Thanks for the correction, though I do believe the -400 was the first to market the signature interior for the 767 line.


User currently offlineGt1 From United States of America, joined Feb 2001, 133 posts, RR: 0
Reply 18, posted (8 years 1 month 3 weeks 6 days 13 hours ago) and read 3539 times:

Higher Gross Weight = Good, about 43,000lbs heavier

New Gear/777 wheels and brakes = Good

New wing tip = Good

Pneumatics = ok - Same valves, but better control and fault isolation

New Cockpit = Bad/ok - Not 777. Not 737NG. Not old 767. Huh? Boeing, can you say commonality? However, it does provide more functionality than the old 767. But the best part for Delta was it looked like a 777 but was a lot cheaper.

Same basic engine = Terrible - History repeats itself with Delta ordering the wrong engine for a new 767 variant twice. First time was the original 763 (non ER) with the CF6-80A. Everyone else took the -80C2. For the -400, DAL specified the -80C2 and they should have taken the -80E1.


User currently offlineLitz From United States of America, joined Dec 2003, 1765 posts, RR: 0
Reply 19, posted (8 years 1 month 3 weeks 6 days 1 hour ago) and read 3501 times:
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Quoting Gt1 (Reply 18):
Same basic engine = Terrible - History repeats itself with Delta ordering the wrong engine for a new 767 variant twice. First time was the original 763 (non ER) with the CF6-80A. Everyone else took the -80C2. For the -400, DAL specified the -80C2 and they should have taken the -80E1.

How hard is it to convert a -C2 to a -E1, or replace the powerplant entirely?

- litz


User currently offlineGigneil From United States of America, joined Nov 2002, 16347 posts, RR: 84
Reply 20, posted (8 years 1 month 3 weeks 5 days 20 hours ago) and read 3462 times:

Quoting Gt1 (Reply 18):
For the -400, DAL specified the -80C2 and they should have taken the -80E1.

The 80E1 is not and never was an option for the 767-400.

It wouldn't even fit.

Quoting Litz (Reply 19):
How hard is it to convert a -C2 to a -E1, or replace the powerplant entirely?

It can't be done. They're very, very different engines.

N


User currently offlineGt1 From United States of America, joined Feb 2001, 133 posts, RR: 0
Reply 21, posted (8 years 1 month 3 weeks 5 days 17 hours ago) and read 3446 times:

Quoting Gigneil (Reply 20):
The 80E1 is not and never was an option for the 767-400.

It wouldn't even fit

I suggest the -80E1 was considered during the design phase. But for the second time, Delta wanted engine commonality. You'll notice that DAL has 4 different engines in their -300 fleet. As for the -400, with a increase in gross weight, length and span, it should have been required.

As for the fit, Boeing proposed a 767-400ERX, with more powerful engines (-80E1 maybe?), a tail trim tank to get back to the range of a -300ER, and 15,000 lbs more gross weight. Of course it never got off the drawing board


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