DIA
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Photo's Of NWA's 2 Types Of 757-251s...why 2?

Thu Jun 08, 2006 12:07 am

I recently completed a multi-city trip on NWA (and getting my fill of DC-9 flight time). During one of my passes through DTW, I noticed two different NWA 752 types. I am simply looking at the exterior door configurations. I never had noticed this before.

Any reason for the two types in one fleet? I'm sure there is a simple answer that I'm not aware of.


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rjpieces
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RE: Photo's Of NWA's 2 Types Of 757-251s...why 2?

Thu Jun 08, 2006 12:11 am

My guess would be that there are 2 types because they inherited some from Republic...
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ABQopsHP
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RE: Photo's Of NWA's 2 Types Of 757-251s...why 2?

Thu Jun 08, 2006 12:13 am

I belive the ones with the exit door 3 behind the wing are old RC a/c.
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DIA
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RE: Photo's Of NWA's 2 Types Of 757-251s...why 2?

Thu Jun 08, 2006 12:25 am

Good comments. But why did some of Republics 757s go to HP (Even after being operated by NWA...while (as you can see above) a few stayed with NWA? What is the story here?
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avconsultant
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RE: Photo's Of NWA's 2 Types Of 757-251s...why 2?

Thu Jun 08, 2006 12:32 am

Quoting DIA (Reply 3):
Good comments. But why did some of Republics 757s go to HP (Even after being operated by NWA...while (as you can see above) a few stayed with NWA? What is the story here?

All of the Republic birds had RR engines, both are PW. After the buyout, NW dumped those aircraft. I did not realzie NW operated 2 different types of 752. The top photo is ship # 1013. The 2nd pic has a photo's from 1985 in the archive.
 
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treebeard787
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RE: Photo's Of NWA's 2 Types Of 757-251s...why 2?

Thu Jun 08, 2006 12:32 am

Quoting DIA (Reply 3):

Some of RC 757s were RR powered and NW 757s were mostly PW so they sold the RR powered birds to HP to save on maintenance costs.
Oh man AvConsultant just beat me to it.

[Edited 2006-06-07 17:35:11]
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ABQopsHP
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RE: Photo's Of NWA's 2 Types Of 757-251s...why 2?

Thu Jun 08, 2006 12:35 am

In 86 HP got their hands on those 757s from RC, most likely because RC was in the process of reducing its fleet. They had all but given up on their old PHX hub, as well as other routes to the west. So when they were parking those planes HP scooped them up.
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ABQopsHP
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RE: Photo's Of NWA's 2 Types Of 757-251s...why 2?

Thu Jun 08, 2006 12:36 am

Oh yeah! I forgot about the engine factor as well...... Smile
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FlyGuyClt
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RE: Photo's Of NWA's 2 Types Of 757-251s...why 2?

Thu Jun 08, 2006 12:43 am

Quoting RJpieces (Reply 1):
My guess would be that there are 2 types because they inherited some from Republic...



Quoting ABQopsHP (Reply 2):
I belive the ones with the exit door 3 behind the wing are old RC a/c.

No and No. All Republic Airlines 757's are with HP and all had RR engines.

The ones with the drop down door 3 are the original NWA 757's delivered in the 80's.

The ones with the window exits are the ones delivered in the 90's. At the time NWA was making a huge amount of money. Another U.S. based airline was not and NWA took up some of their 757 options. They just had the differant lay out and NWA took them anyways.

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PhilSquares
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RE: Photo's Of NWA's 2 Types Of 757-251s...why 2?

Thu Jun 08, 2006 12:49 am

Quoting Treebeard787 (Reply 5):
Some of RC 757s were RR powered and NW 757s were mostly PW so they sold the RR powered birds to HP to save on maintenance costs.
Oh man AvConsultant just beat me to it

All of RC's 757s were RR powered.

All of NW's 757s are PW powered.

Quoting ABQopsHP (Reply 6):
In 86 HP got their hands on those 757s from RC, most likely because RC was in the process of reducing its fleet. They had all but given up on their old PHX hub, as well as other routes to the west. So when they were parking those planes HP scooped them up.

It was after 86 that the RC 757s were removed from NW's fleet. IIRC, RC had 6 or 8 757s when they were bought by NW.

Quoting DIA (Thread starter):
Any reason for the two types in one fleet? I'm sure there is a simple answer that I'm not aware of

Simple answer it they're the same type (757-251). The difference is when they were constructed. 5504 was in the first 757 order, I think it was delivered in 84 or 85. The 5556 was a subsequent order at which time, Boeing had changed the configuration of exits. With the 4 door aircraft the FAA certified pax limit was 239 and with the overwing exits it's 224
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MaxQ2351
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RE: Photo's Of NWA's 2 Types Of 757-251s...why 2?

Thu Jun 08, 2006 1:07 am

Quoting PhilSquares (Reply 9):
It was after 86 that the RC 757s were removed from NW's fleet. IIRC, RC had 6 or 8 757s when they were bought by NW.

This is correct. NWA operated them for a very short time before they got rid of them and they found their way to HP.

Quoting PhilSquares (Reply 9):
Simple answer it they're the same type (757-251).

This is also correct, however the two types are actually rather different. The older series, with the type-2 exit aft of the wing is designated as the "5500 series" at NWA. The newer series with the overwing exits is designated as the "5600 series". And, the 757-300's are the "5800 series". Anyhow, the 55 and 56 series have notable differences. First off, the 56 series have two fuel crossfeed valves as opposed to one, found of the 55 series. The two valves allow for overwater and ETOPS operations. Also, some of the 56 series have the required supplemental radios to be certified for ETOPS operations. Some of the 56's do not.....why??...I don't know, that's just the way of it!!

I know there are some other little differences between the two, but I can't think of them right now!!

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RandyWaldron
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RE: Photo's Of NWA's 2 Types Of 757-251s...why 2?

Thu Jun 08, 2006 1:08 am

Quoting DIA (Thread starter):
I noticed two different NWA 752 types

NW operates two different types of 757-200 series aircraft. Internally, they are known as the:

'5500 Series' - As FlyGuyCLT stated, these aircraft are older (built in the early to mid 1980's) and are the original "Northwest Orient" Boeing 757's. These aircraft have four doors on each side of the aircraft.

'5600 Series' - These aircraft were purchased back in the mid to late 1990's and are slightly different from the older '5500' series. They feature six doors, overwing exits, ETOPS certification and some additional features in the cockpit and cabin which make them a little more modern. These aircraft are the 757's that operate the NRT-Asia routes; the last 757-5600 aircraft was delivered in late 2001.

This seems to be a topic that is discussed to death lately.
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EMBQA
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RE: Photo's Of NWA's 2 Types Of 757-251s...why 2?

Thu Jun 08, 2006 1:28 am

Why are some cars blue and some are silver. Why do some cars have a sunroof, others don't. Why do some cars have spoliers and chrome wheels... others are very basic...?? Options.

It's the same with planes. The airlines that buy them have options as to how they are set up depending on many things. Interior configuration, fleet demands and what markets will it be used on just to name a few. Now, because of these demands and configurations the FAA requires that the aircraft be set up a certain way. So many exits per so many passengers and so many exits per so many rows of sets. All airplanes are not cookie cutter. It's just like buying a car. Flip to the back of the catalog and pick out the options you want.

[Edited 2006-06-07 18:38:10]
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DIA
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RE: Photo's Of NWA's 2 Types Of 757-251s...why 2?

Thu Jun 08, 2006 1:42 am

Quoting EMBQA (Reply 12):
Why are some cars blue and some are silver. Why do some cars have a sunroof, others don't. Why do some cars have spoliers and chrome wheels... others are very basic...?? Options.

It's the same with planes. The airlines that buy them have options as to how they are set up depending on many things. Interior configuration, fleet demands and what markets will it be used on just to name a few. All airplanes are not cookie cutter. It's just like buying a car. Flip to the back of the catalog and pick out the options you want.

Thanks for stating the obvious...it make this forum so interesting and thought-provoking.

I guess the way many of us a.netters look at this is this:
Sometimes you'd like to know why one of your neighbors purchased a red Ford F-150 with 4 wheel drive over another neighbor who purchased a blue Ford F-150 with a stretch cab and more powerful engine with no 4 whell drive...when they both have similar driving habits and routes...and carry about the same payloads!
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EMBQA
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RE: Photo's Of NWA's 2 Types Of 757-251s...why 2?

Thu Jun 08, 2006 1:50 am

Quoting DIA (Thread starter):
Any reason for the two types in one fleet? I'm sure there is a simple answer that I'm not aware of.

My response to your question was just as you thought.. a simple answer. But your wrong on both being used the same way. At the time 504 was bought 20 years ago airlines did not 'pack them in' as much as they do today when 556 was bought 4 years ago. Because of this the airline had to make adjustments to their configurations options to meet the requirments of the FAA.

Also, 504 and 556 have always been with Northwest.

504 was delivered in 1985
556 was delivered in 2002

[Edited 2006-06-07 19:12:00]
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