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Emergency Exits On Aircraft.  
User currently offlineJerion From United States of America, joined Jun 2004, 253 posts, RR: 1
Posted (10 years 3 months 1 week 1 day 14 hours ago) and read 7900 times:

On a 762 there are four door exits and two window exits (one over each wing). The same applies to the 737-100/200/300/500/600/700 and Airbus 318/319 jets. It seems with the additional seats/pax; the 762 should have maybe four window exits (two over each wing).

Is there a rule to how many exits are required per number of seats on the aircraft? If so, anyone know what that is.

From A.net

767-200:

Typical two class seating for 18 premium and 198 economy class pax. Max seating for 290 at eight abreast and 76cm (30in) pitch.


While I think eight abreast seating on 767 is rare (charters only?), I think I'd hate to have an emergency evacuation on a max configured 762!

Jer(emy)

[Edited 2004-06-16 21:34:45]


L10/D9S/D10/M80/M88/732/733/734/735/73G/738/72S/757/762/763/320/319/318/ERJ
16 replies: All unread, jump to last
 
User currently offlineWidgetBoi From United States of America, joined Mar 2004, 1432 posts, RR: 19
Reply 1, posted (10 years 3 months 1 week 1 day 14 hours ago) and read 7873 times:

While I'm not sure of the regulations that exist regarding emergency exits, I do know that some charter companies have equipped their 762s with an extra window exit over each wing.


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jeremy


User currently offlineJerion From United States of America, joined Jun 2004, 253 posts, RR: 1
Reply 2, posted (10 years 3 months 1 week 1 day 14 hours ago) and read 7864 times:

I didn't realize some 762's had two over-wing emergency exits.
Thanks, Jeremy.

Jer(emy)



L10/D9S/D10/M80/M88/732/733/734/735/73G/738/72S/757/762/763/320/319/318/ERJ
User currently offlineSammyhostie From , joined Dec 1969, posts, RR:
Reply 3, posted (10 years 3 months 1 week 1 day 14 hours ago) and read 7863 times:

The rule is (minimum) one exit to every 50 passengers, and this is also the legal crew complement.

However obviously with Overwing exits this minimum is always exceeded.

Safety is never compromised.

Indeed if even one door is considered to be in-operative and un-servicable, a minimum of 50 passengers are offloaded by the Captain.
That in-op door would then be taped up, the crew member removed from the door, and the emergency exits signs above that door taped up to disable it as a visible exit.
The door would also be ommitted from the safety demo.


Hope this helps!




User currently offlineKevi747 From United States of America, joined Apr 2001, 1058 posts, RR: 12
Reply 4, posted (10 years 3 months 1 week 1 day 14 hours ago) and read 7858 times:

The 767 door exits are large and equiped with double-lane evacuation slides, so 2 people can jump out at the same time, thereby doubling their effectiveness.


"Reality has a well-known liberal bias." --Stephen Colbert
User currently offlineJetmek319 From Germany, joined Sep 2003, 199 posts, RR: 1
Reply 5, posted (10 years 3 months 1 week 1 day 13 hours ago) and read 7820 times:

EasyJet's A319's also have two e-doors over each wing. Special order.


Never, ever moon a werewolf !!
User currently offlineCessnaLady From Mexico, joined May 2004, 310 posts, RR: 4
Reply 6, posted (10 years 3 months 1 week 1 day 13 hours ago) and read 7805 times:

I hope not to be far-off topic, but I recently noticed a sharp cold air draft entering from an AA MD80 right wing emergency exit. I was seating in 20-something E seat. In our little Cessna, it is somewhat normal that external air finds a way into the cabin... But this was too muchand too cold for being normal.

I called the attention of an F/A, and she grumbled back saying if I didn't like the cold, I could change seats.

Marie.


User currently offlineHenpol747 From Mexico, joined Jun 2001, 588 posts, RR: 1
Reply 7, posted (10 years 3 months 1 week 1 day 13 hours ago) and read 7797 times:

50 passengers per emergency exit minimum? well then the MD 80 is pretty well equipped!! 8 emergency exits

Cheers,

Henpol747



Vive la France! ¡Viva México!
User currently offlineRoseFlyer From United States of America, joined Feb 2004, 9643 posts, RR: 52
Reply 8, posted (10 years 3 months 1 week 1 day 12 hours ago) and read 7773 times:

Another test for exits that is mandated by the FAA is that all passengers in a max configuration must be able to exit the airplane in 90 seconds or less using only half of the exits.

I remember when a full scale trial was done with the original 777. They tested it in a hanger and 429 of the 430 (I believe that is the correct number, correct me if I am wrong) passengers got out in under 90 seconds, and therefore the original 777-200 was certified for 429 passengers. I am sure they did this with the 762 as well, and it succeeded. The twin aisles of the 767 rapidly increase the pace of an evacuation and allows for fewer exits.



If you have never designed an airplane part before, let the real designers do the work!
User currently offlineCrosswind From United Kingdom, joined Nov 2000, 2598 posts, RR: 58
Reply 9, posted (10 years 3 months 1 week 1 day 11 hours ago) and read 7733 times:
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There is no "1 exit for every 50 passengers" requirement in certifying aircraft for evacuation purposes.

They are bound by the distance between exits, the ability to evacuate all passengers with half the exits inoperative in 90 seconds and finally physical space, ie how many seats can you actually fit in the cabin?

The number of exits isn't really as important as their type, double width doors can obviouly allow a much higher number of passengers to evacuate than an overwing exit.
Types A/B/C are main cabin doors
(A is a double-wide, double-slide door, B is single-width, double-slide, C is single-width, single-slide)
Type I, II or III are emergency exits
They range from Type I, found on the 757 at door 3, to type III, a standard overwing-exit.

Where loads are reduced due to inoperative exits, the MEL for each aircraft type will determine how many passengers can leaglly be carried, dependant on the type/location of the inoperative exit.

There is a 1 cabin crew member for 50 seats (not passengers) requirement, but for some aircraft types there are further restrictions applied. For example British Airways' low-density 767-300s have only 193 seats, however the UK CAA have imposed a minimum crew complement of 7 on the type due to it's size. Obviously for a charter airline like MyTravel with 326 seats in the 767-300, the CAA and 1 cabin crew member for 50 seats rule give the same minimum crew complement anyway.

The maximum capacities for all UK-registered aircraft, along with a lot of other certification data, can be found on the CAA Aircraft Type Certificate Data Sheets page.

Regards
CROSSWIND


User currently offlineVirginFlyer From New Zealand, joined Sep 2000, 4575 posts, RR: 40
Reply 10, posted (10 years 3 months 1 week 1 day 9 hours ago) and read 7672 times:

As stated above, the number of exits depends on the size of the exits. For example, even though both the 737-800 and 767-300 have 4 passenger doors and 4 overwing hatches, the 767 can carry more people, because it has larger doors.

For a specific definition, the best resource is the Federal Aviation Regulations Part 25, specifically:

25.803
25.807
25.809
25.810
25.811
25.812
25.813

That should explain pretty much everything you need to know about emergency exits, I think. A full list of FARs, which govern pretty much everything, can be found here.

I hope this is useful,

V/F



"So powerful is the light of unity that it can illuminate the whole earth." - Bahá'u'lláh
User currently offlineHorus From Egypt, joined Feb 2004, 5230 posts, RR: 59
Reply 11, posted (10 years 3 months 1 week 1 day 9 hours ago) and read 7668 times:

Easyjet's new A319s are packed with the maximum 150 seats so they have an extra set of emergency exits over the wings.


EGYPT: A 7,000 Year Old Civilisation
User currently offlineSlamClick From United States of America, joined Nov 2003, 10062 posts, RR: 68
Reply 12, posted (10 years 3 months 1 week 1 day 9 hours ago) and read 7659 times:

CessnaLady the draft you were feeling in the MD-80 had to have been from the air conditioning ducts. An air leak in a pressurized airplane leaks air OUT OF the cabin, not into it. The pressure in the cabin was probably in the neighborhood of 8 pounds per square inch higher than the atmospheric pressure outside.





Happiness is not seeing another trite Ste. Maarten photo all week long.
User currently offline777gk From United States of America, joined Jun 2000, 1641 posts, RR: 18
Reply 13, posted (10 years 3 months 1 week 1 day 8 hours ago) and read 7632 times:

For all intents and purposes, the 767-200 has a total of 10 emergency exits. Each door is double-wide with a dual-lane slide, allowing the simultaneous egress of two passengers, and two overwing exits, one on each wing, with dual-lane weighted ramp slides off the trailing edge.

The 767-200 as I recall fell well within the FAA regulations as far as emergency evac (all pax down the slides inside 90 seconds with half of the exits randomly disabled), and when you consider that in the Continental configuration, the 767-224/ER seats less than our standard 757-224 configuration but has the same number of "lanes" for evacuation, I would not feel unsafe about flying on a 762 at all.


User currently offlineJerion From United States of America, joined Jun 2004, 253 posts, RR: 1
Reply 14, posted (10 years 3 months 1 week 1 day 8 hours ago) and read 7616 times:

For all intents and purposes, the 767-200 has a total of 10 emergency exits. Each door is double-wide with a dual-lane slide, allowing the simultaneous egress of two passengers, and two overwing exits, one on each wing, with dual-lane weighted ramp slides off the trailing edge.

The 767-200 as I recall fell well within the FAA regulations as far as emergency evac (all pax down the slides inside 90 seconds with half of the exits randomly disabled), and when you consider that in the Continental configuration, the 767-224/ER seats less than our standard 757-224 configuration but has the same number of "lanes" for evacuation, I would not feel unsafe about flying on a 762 at all.


777gk:

I had no idea about double-wide doors, dual lane e-slides, regulations, etc. Now that I do, it all make sense.

Thanks.
 Smile

Jer(emy)



L10/D9S/D10/M80/M88/732/733/734/735/73G/738/72S/757/762/763/320/319/318/ERJ
User currently offlineAa757first From United States of America, joined Aug 2003, 3350 posts, RR: 7
Reply 15, posted (10 years 3 months 1 week 1 day 6 hours ago) and read 7581 times:

The door would also be ommitted from the safety demo.

I guess that means a live demo must be performed? Or can they play the recorded video and then announce at the end "Ladies and gentlemen, 2R is not functioning" or something similar?

AAndrew


User currently offlineSammyhostie From , joined Dec 1969, posts, RR:
Reply 16, posted (10 years 3 months 1 week 1 day 2 hours ago) and read 7530 times:

Yes Aa757,

In the event of any door being inop, a manual demo would have to be performed excluding the door as an exit and an additional PA made just to confirm this to passengers.

The emergency lighting to the door is alsocompletely covered, including the low level lighting on the floor.


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