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Boeing 757 emergency exits question  
User currently offlineFlydc10 From Mexico, joined Aug 2004, 82 posts, RR: 0
Posted (9 years 6 months 1 day 5 hours ago) and read 7914 times:

Hey

I was wondering why did Boeing made 752 with emergency exits over the winds, like the 737 and A320 and they also made another variant with a bigger exit on the back of the fuselage (see image) what are the main differences of both airplanes.

Exit like a 737
http://www.airliners.net/open.file?i...20ol%20cubgb_vq%20QRFP&photo_nr=22

Big exit
http://www.airliners.net/open.file?i...20ol%20cubgb_vq%20QRFP&photo_nr=59


vivan nuestras aerolineas nacionales
18 replies: All unread, jump to last
 
User currently offlineDeltaWings From Switzerland, joined Aug 2004, 1294 posts, RR: 17
Reply 1, posted (9 years 6 months 1 day 5 hours ago) and read 7898 times:

I think it depends on the number of pax, that is in the aircraft. If it is configured in a high economy class, like 235 on the 752, then 8 doors are needed.


~DeltaWings



Homer: Marge, it takes two to lie. One to lie and one to listen.
User currently offlineSeptember11 From United States of America, joined May 2004, 3623 posts, RR: 21
Reply 2, posted (9 years 6 months 1 day 5 hours ago) and read 7875 times:

gallery is in the back hence big exit doors - to allow catering people easy access (food service)


Airliners.net of the Future
User currently offlineQxq400 From United States of America, joined Dec 2004, 255 posts, RR: 2
Reply 3, posted (9 years 6 months 1 day 4 hours ago) and read 7811 times:

I still miss that plane,wish boeing keep making them.
At least they will be flying for years. cry 



Welcome baby Madison Renee
User currently offlineVS74741R From United Kingdom, joined Feb 2005, 272 posts, RR: 0
Reply 4, posted (9 years 6 months 1 day 2 hours ago) and read 7711 times:

Doesn't it have something to do with what country the airline is from? I mean all 757s owned by American airlines (CO, NW, DL, AA, TWA, UA) etc have 2 doors on each side where as airlines in the UK (BA and most tour operators) all have 4 doors on each side.


Obviously a Virgin Atlantic fan!!!
User currently offlineAvionicMech From United Kingdom, joined Jan 2005, 315 posts, RR: 3
Reply 5, posted (9 years 6 months 1 day 2 hours ago) and read 7656 times:

As DeltaWings mentioned it is to do with the interior config of the aircraft i.e. the number of seats fitted. Here in the UK we don't really have as many airlines flying 757's with a first class cabin so there is usually more people on board therefore more exits are needed. It is the same with the 767-300, most airlines in the UK have four doors whereas our friends in the US and else where in the world have two main doors and two overwing exits just like our 767-200's.

You will also find that Easyjet's A319's are the only 319's that you will find fitted with two overwing exits. This is because they are squeezing in more people than the regulations allow for getting out of two doors and one overwing exit. The regulations lay out different classes of exit and how many people can get out of them in the 90 second escape time, so if you are squeezing in more people then you will need more exits.


User currently offlineAa757first From United States of America, joined Aug 2003, 3350 posts, RR: 7
Reply 7, posted (9 years 6 months 1 day 1 hour ago) and read 7546 times:

Quoting VS74741R (Reply 4):
Doesn't it have something to do with what country the airline is from? I mean all 757s owned by American airlines (CO, NW, DL, AA, TWA, UA) etc have 2 doors on each side where as airlines in the UK (BA and most tour operators) all have 4 doors on each side.

In the United States, we don't have many low cost tour operators, like Monarch, First Choice, TUI, etc. These operators generally pack their planes with as many people as the CAA (British FAA) will allow. Thus, they need more exits.

I'm not sure why BA would opt for this, unless they picked up their 757 fleet for a charter operator.

AAndrew


User currently offlineDl757md From United States of America, joined May 2004, 1562 posts, RR: 16
Reply 8, posted (9 years 6 months 1 day ago) and read 7524 times:

Quoting VS74741R (Reply 4):
I mean all 757s owned by American airlines (CO, NW, DL, AA, TWA, UA) etc have 2 doors on each side



Quoting AvionicMech (Reply 5):
whereas our friends in the US and else where in the world have two main doors and two overwing exits just like our 767-200's

There is no 2 main door option on the 757. There are three types of doors on a pax 757. There is the full size entry door, a smaller service door, and the smaller still overwing exit door. There a 4 locations for the entry/service doors which are hinged doors with a slide located on the door, the L1/R1 FWD door, L2/R2 door just fwd of the wing, L3/R3 just aft of the wing, and L4/R4 aft door,. In contrast the overwing exits are fully removable doors that when they are opened activate a slide stored behind a fillet panel above the wing, deploying off the back of the wing and to the ground.

The two main door location variations (there may be others that I'm not aware of) are the "Euro" L1/R1/L2/R2 main entry doors and L3/R3/L4/R4 service doors or "US" L1/R1/L2/R2/L4/R4 main entry doors with over wing exits.

I'm not sure about the above claims that the euro layout is for greater capacity(faster egress) as you have two large and two medium vs. the US layout which has three large and two small doors. These claims seem a bit of a stretch to me. I think it just boils down to customer preference.


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Photo © Peter Pontoppidan
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Photo © Saul Loeb



Dl757Md



757 Most beautiful airliner in the sky!
User currently offlineAvionicMech From United Kingdom, joined Jan 2005, 315 posts, RR: 3
Reply 9, posted (9 years 6 months 9 hours ago) and read 7440 times:

I didn't really write that very clearly did I now that I have re-read it. When I said they have two doors I meant on each side, so they have four main doors and four overwing exits on the 767 and the 757 has 6 main doors and 4 overwing exits.

Quoting Dl757md (Reply 8):
I'm not sure about the above claims that the euro layout is for greater capacity(faster egress) as you have two large and two medium vs. the US layout which has three large and two small doors.

I have never used an overwing exit on a 757 but on the 767 I am certain that I would get out a lot faster through the exit behind the wing as opposed to those tiny doors over the wing. The reason I say this is that I have climbed through these overwing exits during maintenance for access to the wing and they are not as easy as just throwing yourself out the door like a standard emergency exit door.


User currently offlineDl757md From United States of America, joined May 2004, 1562 posts, RR: 16
Reply 10, posted (9 years 6 months 9 hours ago) and read 7437 times:

Quoting AvionicMech (Reply 9):
I have never used an overwing exit on a 757 but on the 767 I am certain that I would get out a lot faster through the exit behind the wing as opposed to those tiny doors over the wing

The overwing exit on a 57 is slightly smaller than the overwing exit on a 67. It is in fact the same size as the overwing exit on a 37 if you've ever experienced those. I have no doubt you would get out faster through the service door aft of the wing than you would through an overwing exit, but remember there are two of those small overwing exits per side vs. only one of the L3/R3 service doors.

Quoting AvionicMech (Reply 9):
The reason I say this is that I have climbed through these overwing exits during maintenance for access to the wing and they are not as easy as just throwing yourself out the door like a standard emergency exit door.

I've been through those doors as well during mtc. but I have to tell you that the L3/R3 doors are not as big as people think they are. You aren't going to just throw yourself out that door either. Faster than one overwing? Yes. Faster than two overwings? I'd like to see the numbers but I think not. Anyway, an interesting debate.

Oh, also a correction to my previous post. The L4/R4 doors on all 757s are main entry doors. Not service doors on the 'euro' version as I incorrectly stated before.

Cheers
Dl757Md



757 Most beautiful airliner in the sky!
User currently offlineAA737-823 From United States of America, joined Mar 2000, 5824 posts, RR: 11
Reply 11, posted (9 years 5 months 4 weeks 1 day 15 hours ago) and read 7354 times:

Uh, wait a minute y'all.
You say that it's because in the UK, they cram more people on the plane.
And someone said that ALL AMERICAN carriers have the safe config.

Not so.
United has overwings
Delta has overwings
American has overwings
Continental has overwings
ATA has overwings

TWA has four main doors (no overwings)
US has four mains (no overwings)
America West has four mains (no overwings)
Eastern had four mains (no overwings)
Aeromexico has four mains (no overwings)
Hooters has four mains (no overwings)
MExicana has four mains (no overwings)

And Northwest has a mixture of both (hooray, expensive subfleets!)

And may I remind you that many of your UK 757s came from, where else, defunct US majors (ahem, Easter's -225s that went to My Travel and Britannia)

SO- not sure about the theory mentioned, as the above airlines have similarly configured cabins.


User currently offlineTheflcowboy From United States of America, joined Jan 2004, 405 posts, RR: 0
Reply 12, posted (9 years 5 months 4 weeks 1 day 8 hours ago) and read 7321 times:

Quoting AA737-823 (Reply 11):
And Northwest has a mixture of both (hooray, expensive subfleets!)

American has both. The ex-TWA birds had no overwings. Makes for an awesome exit row seat. Bulkhead with extra leg room.

MD



A318, A320, A332, A333, B1900, B722, B732, B733, B734, B735, B737, B738, B772, CR1, CR2, CR7, CR9, MD80, MD81, MD82, MD8
User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 13, posted (9 years 5 months 3 weeks 4 days 9 hours ago) and read 7182 times:

How many doors on a B752PF.
Saw only one Fwd LH on an Ethiopian cargo B752PF.
regds
MEL



Think of the brighter side!
User currently offlineUAcsOKC From United States of America, joined Dec 2004, 107 posts, RR: 1
Reply 14, posted (9 years 5 months 3 weeks 3 days ago) and read 7114 times:

Quoting HAWK21M (Reply 13):
How many doors on a B752PF.
Saw only one Fwd LH on an Ethiopian cargo B752PF.
regds
MEL

Assuming that it's not a combi (and it's probably not), Just one door, for the crew. All of UPS's 757-200F's have just two doors, the crew door and the cargo door. After all, why would the freight need an emergency exit?



I love the rumble of a 727 takeoff in the morning!
User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 15, posted (9 years 5 months 3 weeks 2 days 13 hours ago) and read 7057 times:

Quoting UAcsOKC (Reply 14):
After all, why would the freight need an emergency exit

Makes sense  Smile
Do the Sliding windows exist similiar as the B737 Emergency exits.
regds
MEL



Think of the brighter side!
User currently offlineAvionicMech From United Kingdom, joined Jan 2005, 315 posts, RR: 3
Reply 16, posted (9 years 5 months 3 weeks 2 days 7 hours ago) and read 7046 times:

Yeah the 757 also has the sliding No.2 windows but it has the luxury of a winding handle to slide it back and forwards rather than just having to push it by hand.  Big grin

User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 17, posted (9 years 5 months 3 weeks 2 days 6 hours ago) and read 7051 times:

Quoting AvionicMech (Reply 16):
Yeah the 757 also has the sliding No.2 windows but it has the luxury of a winding handle to slide it back and forwards rather than just having to push it by hand

Is that useful or Time Delaying especially if its to be used in an Emergency.
Also the Doors on a B757 do they open outwards like the B737.
I seen an Ethiopian B757-200PF & it had only one Exit on Fwd lh side which opened Inwards.
Anyone can confirm.
regds
MEL



Think of the brighter side!
User currently offlineAvionicMech From United Kingdom, joined Jan 2005, 315 posts, RR: 3
Reply 18, posted (9 years 5 months 3 weeks 2 days 5 hours ago) and read 7045 times:

I don't think it would really make much difference in getting out because you still have to get the rope out and throw it out the window then try and climb out without falling to the ground so I doubt it would make much difference.

Yeah the doors on the passenger version of the 757 certainly open and swing outwards just like the 737 but I have never worked on the freighters so I can't say for them. But one thing I will say is that the 757 doors are a lot heavier to open and close as opposed to the 737 ones.


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