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734 Max Range?

Posted: Sun May 13, 2007 10:30 pm
by EIPremier
I have been tracking the AS ANC-LAX flight prior to taking it, and have noticed on at least two occasions that a 737-400 was subbed for a 737-700 on this route (once in each direction). I guess I'm surprised the 737-400 has sufficient range to make the trip non-stop. The distance is 2345 miles, although it must be routed along the coast as a non-ETOPS aircraft, this adds another 50 or so miles. Isn't this pushing max range? I know US used 737-400 for some transcons, although I believe these aircraft had auxilary fuel tanks. I know AS had a 734 flight on ORD-SEA (1721 mi), and the westbound trip actually had to make a fuel stop on one occasion I can recall due to very strong headwinds.

RE: 734 Max Range?

Posted: Sun May 13, 2007 10:36 pm
by Oykie
Some of the Classics have Axillary tanks installed. I am not sure if AS has this on their planes.

RE: 734 Max Range?

Posted: Sun May 13, 2007 10:45 pm
by as739x
Alaska -400 do not has aux tanks. But with a light load the -400 can do the ANC-LAX with sufficient reserve. The flight you see (Flight 106) has less then 60 passengers. The tough flight is LAX-ANC which I don't think can be done with bad weather on the ANC end and I never saw it leave with more the 45 pax.

ASSFO

RE: 734 Max Range?

Posted: Sun May 13, 2007 10:46 pm
by EIPremier
AFAIK, AS did not install auxillary tanks on the 734s, because AS carries so much cargo to/from Alaska and that would take away from payload. I know they did (perhaps still do) have auxillary tanks on a few MD-80s, but they are no longer needed since AS uses 737NG for all it's long-haul routes now.

According to the airliners.net aircraft info page, the max range of a 737-400 with full load of 146 pax is 1960 nm which is 2260 mi. Obviously there are a lot of factors (pax/cargo load, temp and wind at departure city, dept runway length, en route weather/winds) that will affect the range. But, I still wonder if this flight would be even possible with max payload.

RE: 734 Max Range?

Posted: Sun May 13, 2007 10:53 pm
by roseflyer
Why is this route being operated with so few passengers?

RE: 734 Max Range?

Posted: Sun May 13, 2007 10:58 pm
by VHXLR8
Quoting RoseFlyer (Reply 4):
Why is this route being operated with so few passengers?

Possibly just replacement a/c due to light loads perhaps?? (yet still able to uplift substantial cago/mail)

RE: 734 Max Range?

Posted: Sat May 19, 2007 7:43 am
by Gib
I took a US 734 that was subbed for a 757 -- CLT-SFO back in the early 90's. We had to make a fuel stop in SJC.