kaddyuk
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Weight Of B737 Emergency Exit...

Tue Sep 26, 2006 8:33 am

Flying home from manchester earlier today, I was sat in the exit row, next to the escape door... I was wondering how heavy is that door and would it take more than one person to get it outside the aircraft?

Once the hatch is open, how do you escape from the wing? should you slide down the flaps or is there an emergency slide?

Thanks!
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EMBQA
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RE: Weight Of B737 Emergency Exit...

Tue Sep 26, 2006 9:18 am

Quoting Kaddyuk (Thread starter):
Flying home from manchester earlier today, I was sat in the exit row, next to the escape door... I was wondering how heavy is that door and would it take more than one person to get it outside the aircraft?

The placard on the door should have said the weight... my guess, 20-30lbs.

Quoting Kaddyuk (Thread starter):
Once the hatch is open, how do you escape from the wing? should you slide down the flaps or is there an emergency slide?

Most smaller planes you slide down the flaps.
"It's not the size of the dog in the fight, but the size of the fight in the dog"
 
lincoln
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RE: Weight Of B737 Emergency Exit...

Tue Sep 26, 2006 12:41 pm

Quoting EMBQA (Reply 1):
The placard on the door should have said the weight... my guess, 20-30lbs.

Now I hate to admit this having sat in the exit row countless times, I've noticed it on the 737 classics and other fleet types (752/753, ERJ for instance)...do the NGs have a placarded weight, or since they're pull-n-go is there no weight to speak of?

As an aside, anyone have video of opening an NG exit? From what I've heard, they open with enough force to pull you out of the aircraft if you make the mistake of hanging on.

Lincoln
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HAWK21M
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RE: Weight Of B737 Emergency Exit...

Tue Sep 26, 2006 9:26 pm

Are you referring to the Classics or NGs.If its the Former I think 10-15kgs,as you need to pull it indoors as its a plug type.On the NGs no such issue as its power asisted outward opening upwards.
The Escape path is go aft & slide on the TE flaps.Unless theres a fire.Theres no Emergency Slide only an Emergency Rope thats hooked to the upper side of the wing,as a handhold.
regds
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miamiair
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RE: Weight Of B737 Emergency Exit...

Tue Sep 26, 2006 9:58 pm

Quoting EMBQA (Reply 1):
The placard on the door should have said the weight... my guess, 20-30lbs.

You win the prize... 35 pounds. (ref: 737 CMM 52-26-01)
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RichardPrice
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RE: Weight Of B737 Emergency Exit...

Tue Sep 26, 2006 10:04 pm

Quoting Kaddyuk (Thread starter):
I was wondering how heavy is that door and would it take more than one person to get it outside the aircraft?

Ive heard of people taking souvenir's of their flight, but come on....!
 
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HAWK21M
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RE: Weight Of B737 Emergency Exit...

Tue Sep 26, 2006 10:36 pm

Quoting HAWK21M (Reply 3):
Are you referring to the Classics or NGs.If its the Former I think 10-15kgs,as you need to pull it indoors as its a plug type



Quoting Miamiair (Reply 4):
You win the prize... 35 pounds. (ref: 737 CMM 52-26-01)

10-15kgs = 22-33lbs.How about sharing It. Smile
BTW what about the Weight of the NG Emergency Exit doors.

regds
MEL
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miamiair
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RE: Weight Of B737 Emergency Exit...

Tue Sep 26, 2006 11:43 pm

Quoting HAWK21M (Reply 6):
BTW what about the Weight of the NG Emergency Exit doors.

50 pounds = 22.7 Kgs
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Shamrock_747
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RE: Weight Of B737 Emergency Exit...

Sat Sep 30, 2006 1:31 am

Quoting Kaddyuk (Thread starter):
I was wondering how heavy is that door and would it take more than one person to get it outside the aircraft?

I've operated one before and it is very heavy. A small person with little arm strength would probably struggle with it but in a real emergency with adrenalin pumping I'm sure just about anyone could do it.

Quoting Kaddyuk (Thread starter):
Once the hatch is open, how do you escape from the wing? should you slide down the flaps or is there an emergency slide?

There is no slide at the wings. In an evacuation you would have to jump off the back of the wing or slide down the flaps.
 
chksix
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RE: Weight Of B737 Emergency Exit...

Sat Sep 30, 2006 4:44 pm

I mght be paranoid again, but why are these questions about emrg exit handling popping up now?

New plans to bring a plane down? Or just doing research about methods?

Ok, I'll creep back to my guard dog house now....
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twal1011727
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RE: Weight Of B737 Emergency Exit...

Sun Oct 01, 2006 12:14 am

Quoting Shamrock_747 (Reply 8):
Quoting Kaddyuk (Thread starter):
I was wondering how heavy is that door and would it take more than one person to get it outside the aircraft?

I've operated one before and it is very heavy. A small person with little arm strength would probably struggle with it but in a real emergency with adrenalin pumping I'm sure just about anyone could do it.

Comair had a EMB120(Brasilia) do a gear up landing at MCO. The pilot stopped the A/C perfectly on the centerline of the runway. Granted the EMB120 door isn't that big but a pax seated in the emergency exit row opened the exit(when told to) and tossed the exit out the opening. It landed in the grass - 60 feet away from the A/C !!
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CM767
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RE: Weight Of B737 Emergency Exit...

Fri Oct 20, 2006 2:45 am

Quoting Shamrock_747 (Reply 8):
I've operated one before and it is very heavy. A small person with little arm strength would probably struggle with it but in a real emergency with adrenalin pumping I'm sure just about anyone could do it.

If I recall correctly that was not the case on a 737 accident on Manchester, and I believe that's why on the NG, the over the wing doors swing out. A woman was trapped when the door fell on her.

Please correct if anyone has a better recollection of that accident.
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Jamie757
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RE: Weight Of B737 Emergency Exit...

Fri Oct 20, 2006 4:49 am

Forgive the question, but during an overwing evacuation, is there not a risk of encountering jetblast from an engine that may still be running? Is the evacuation command given after engine shutdown? What if an engine cannot be shut down?

Rgds.
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atlamt
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RE: Weight Of B737 Emergency Exit...

Fri Oct 20, 2006 7:02 am

Quoting HAWK21M (Reply 6):
BTW what about the Weight of the NG Emergency Exit doors.

But the NG doors are hinged at the top and are spring loaded to open once released. So even though it's heavier it's much eaiser to open and get out.
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WNCrew
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RE: Weight Of B737 Emergency Exit...

Fri Oct 20, 2006 7:13 am

Quoting Atlamt (Reply 13):
Forgive the question, but during an overwing evacuation, is there not a risk of encountering jetblast from an engine that may still be running? Is the evacuation command given after engine shutdown? What if an engine cannot be shut down?

Yes, the risk is present, but in almost all evacuation "scenarios" I've been trained in, the pilots run through the emergency evac. checklist which is pasted on the control column and includes engine shutdown.

Generally, Flight Attendants wait until the evacation command from the Flight Deck which would occur once engines were shut down (i.e the Captain felt it was safe to commence evacuation).

The only time we are told to begin an evacuation UNcommanded from the Flight Deck is when another crew member has commenced an evacuation, or when we detect life threatening conditions in the cabin (at which point) we would repeatedly ring the FD with a series of chimes on the interphone signaling the need to evacuate and once the A/C came to a complete stop and engines shut off, we would commence the evacuation.
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Bobster2
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RE: Weight Of B737 Emergency Exit...

Fri Oct 20, 2006 9:35 am

Quoting Jamie757 (Reply 12):
Is the evacuation command given after engine shutdown?

Sometimes the evacuation is initiated by the passengers, even while the plane is still moving. When there's smoke, the passengers tend to panic and all the flight crew's training goes out the window, so to speak.  Smile

One time an engine made a long bang during the boarding process at the gate. Passengers went out the overwing exits and they jumped out the rear doors. Flight attendants had to step aside to keep from getting trampled.
"I tell you this, no eternal reward will forgive us now for wasting the dawn." Jim Morrison
 
WNCrew
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RE: Weight Of B737 Emergency Exit...

Fri Oct 20, 2006 10:10 am

Quoting Bobster2 (Reply 15):
Sometimes the evacuation is initiated by the passengers, even while the plane is still moving. When there's smoke, the passengers tend to panic and all the flight crew's training goes out the window, so to speak.

Depending on how many pax were panicking I would simply give the FD the EVAC signal and initiate the evacuation myself....once the A/C stops of course.

Once mass hysteria sets in it's pointless to try and stop it, far easier to simply follow through. As far as flight crew training going out the window...I'm sure it has happened, but we are DRILLED repeatedly so it's second nature to go into your evac mode. Granted no evacuation is likely to be textbook (ie your exit my be a hole in the fuselage and NOT an actual exit) but you still know what needs to be done.
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Markhkg
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RE: Weight Of B737 Emergency Exit...

Fri Oct 20, 2006 10:13 am

Quoting WNCrew (Reply 14):
we would repeatedly ring the FD with a series of chimes on the interphone signaling the need to evacuate and once the A/C

Or on other aircraft the evacuation alarm is sounded. Usually makes a loud *beep beep beep* noise along with a flashing EVAC light on some crew panels.

Quoting Bobster2 (Reply 15):
Sometimes the evacuation is initiated by the passengers

The 727 is apparently NOTORIOUS for scaring the passengers into starting an uncommanded evacuation. The torching of the APU can been seen by the pax and some well intentioned people may start opening exits.

Quoting Bobster2 (Reply 15):
Flight attendants had to step aside to keep from getting trampled.

In one unwarrented evacuation case, a pax physically LIFTED the flight attendant OUT OF THE WAY (although she was telling him to stop), put her aside, and opened the floor level exit...yes, while the engines were running. This was publicized after 9/11 since it was pointed out that sometimes you NEED TO LISTEN TO YOUR CABIN CREW instead of taking "heroic" action!
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Bobster2
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RE: Weight Of B737 Emergency Exit...

Fri Oct 20, 2006 10:19 am

Quoting WNCrew (Reply 16):
As far as flight crew training going out the window...

That part of my message was meant as an innocent joke. I was picturing passengers going out the window and "going out the window" has a double meaning.  Smile
"I tell you this, no eternal reward will forgive us now for wasting the dawn." Jim Morrison
 
TheJoe
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RE: Weight Of B737 Emergency Exit...

Sun Oct 22, 2006 12:16 am

Most of my experience has been working on 737-300, -400 and -800's. The plug door on the classics are quite awkward to handle, even installing them and removing them for maintenance purposes without any pressure at all! I imagine that it would be a lot harder for a passengers under pressure who have never removed it before in their lives!

I believe the door on the "New Gen" is a much better design in my opinion. They are spring loaded, so all a passenger would have to do in an emergency is pull the handle, and the door will spring open! With regard to what Lincoln posted on Tue Sep 26:

"As an aside, anyone have video of opening an NG exit? From what I've heard, they open with enough force to pull you out of the aircraft if you make the mistake of hanging on."

I have opened them many times before, I'm about 6'1 and 95kg so I've never found myself across the other side of the hangar. They do pack a bit of force though, so if you only weighed 45kg and wasn't expecting it, you may find yourself out on the wing a little faster than you first thought!

The only question this new design poses is what is to stop a curious passenger from pulling the handle in cruise? Obviously this type of door is not a plug type like in the older aircraft. Pressure differential would stop anyone from removing it when they shouldn't. Even with only about 2psi differential pressure, there would be about 1000 pound of force holding that door in! From memory I think the door on the -800 has a mechanical lock which is engaged by the aircraft air-ground logic, or something similar. Don't quote me on that, I'll have to check the AMM!

Once you have the door is open, you've gotta get off the aircraft! Sliding down the trailing edge flaps sounds easy enough, but it is still quite a height off the ground! So it may be quite difficult for the elderly and children to get off the aircraft, but they have decided it's not quite high enough to carry an over-wing slide like some of the bigger aeroplanes!
 
Markhkg
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RE: Weight Of B737 Emergency Exit...

Sun Oct 22, 2006 8:30 pm

Quoting TheJoe (Reply 19):
The only question this new design poses is what is to stop a curious passenger from pulling the handle in cruise?

Actually, the NG overwing door has an in-flight lock that keeps the door secure in-flight...it is automatically disengaged once the plane lands again. (Numerous factors control the lock, like throttle position, etc.)
Release your seat-belts and get out! Leave everything!
 
troubleshooter
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RE: Weight Of B737 Emergency Exit...

Sun Oct 22, 2006 8:58 pm

See also this thread for the NG flight locks: B737 NG Overwing Exit Lock (by MarkHKG Sep 17 2006 in Tech Ops)
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TheJoe
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RE: Weight Of B737 Emergency Exit...

Mon Oct 23, 2006 4:00 pm

Quoting Troubleshooter (Reply 21):
See also this thread for the NG flight locks:
B737 NG Overwing Exit Lock (by MarkHKG Sep 17 2006 in Tech Ops)

Thanks for that! Some interesting reading... I couldn't remember exactly how the door lock logic worked, but it's all coming back to me now!
 
troubleshooter
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RE: Weight Of B737 Emergency Exit...

Tue Oct 24, 2006 2:10 pm

Quoting TheJoe (Reply 22):
Thanks for that!

You´re welcome!
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