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747 Stair "Lock"?  
User currently offlineSafetyDude From United States of America, joined Sep 2001, 3795 posts, RR: 15
Posted (10 years 3 months 3 weeks 5 days 16 hours ago) and read 7860 times:

I remember seeing on "Turbulence" that the FA went to the upper deck stairs and on a panel near the stairs, was able to flick a switch with a key that moved a metal panel that covered the top of the staircase so that no one could go up or down on the stairs.

I am wondering if 747s (-300 and -400, and possibly the SUDs) do actually have this feature and what it is used for.

 Smile
-Will


"She Flew For What We Stand For"
9 replies: All unread, jump to last
 
User currently offlineDL_Mech From United States of America, joined Feb 2000, 1979 posts, RR: 9
Reply 1, posted (10 years 3 months 3 weeks 4 days 21 hours ago) and read 7577 times:

I'm no 747 expert, but there is a "smoke barrier" similar to the "lock" at the top of the stairs on the -300/-400s.


This plane is built to withstand anything... except a bad pilot.
User currently offlineSafetyDude From United States of America, joined Sep 2001, 3795 posts, RR: 15
Reply 2, posted (10 years 3 months 3 weeks 4 days 21 hours ago) and read 7571 times:

That makes sense as to what it is.

Thanks.  Smile
-Will



"She Flew For What We Stand For"
User currently offlineMsl747 From United States of America, joined Jul 2004, 412 posts, RR: 1
Reply 3, posted (10 years 3 months 3 weeks 4 days 17 hours ago) and read 7524 times:

By "smoke barrier" do you mean like separating the smoking and Non-smoking sections or something else? Is it standard or optional equipment on the -300/-400?

Msl747 Smile/happy/getting dizzy



Commercial Pilot Certificate: Single and Multi-Engine Land; Instrument Airplane
User currently offlineSafetyDude From United States of America, joined Sep 2001, 3795 posts, RR: 15
Reply 4, posted (10 years 3 months 3 weeks 4 days 17 hours ago) and read 7522 times:

By "smoke barrier" do you mean like separating the smoking and Non-smoking sections or something else? Is it standard or optional equipment on the -300/-400?
What I am talking about (and I believe the first reply as well) is at the top of the stairs that separate the main cabin from the upper deck, and I would presume that it is standard.

 Smile
-Will



"She Flew For What We Stand For"
User currently offlineMsl747 From United States of America, joined Jul 2004, 412 posts, RR: 1
Reply 5, posted (10 years 3 months 3 weeks 4 days 16 hours ago) and read 7517 times:

So what purpose does a stair lock serve? Why would it be needed? Just wondering...

-Msl747 Smile/happy/getting dizzy



Commercial Pilot Certificate: Single and Multi-Engine Land; Instrument Airplane
User currently offlineSafetyDude From United States of America, joined Sep 2001, 3795 posts, RR: 15
Reply 6, posted (10 years 3 months 3 weeks 4 days 16 hours ago) and read 7506 times:

So what purpose does a stair lock serve? Why would it be needed? Just wondering...
Judging from the earlier post, in the event that there is smoke somewhere on the aircraft, that lock can be applied that would prevent smoke from going between levels, although I wonder what would be done regarding the oxygen circulation as smoke could travel through it.

Does anyone have any operating procedures on the lock?

 Smile
-Will



"She Flew For What We Stand For"
User currently offlineLorm From United States of America, joined Jun 2004, 409 posts, RR: 1
Reply 7, posted (10 years 3 months 3 weeks 2 days 10 hours ago) and read 7296 times:

Went digging around in the closet for some old F/A handbook pages about the 747 smoke barrier since I've seen it deployed once in a 747-200 a long time ago, at a gate as MX were doing a check on stuff after an overhaul. The smoke barrier is a deployable screen almost parachute like in material that is deployed to prevent smoke from the lower deck from entering the cockpit area. In the earlier 100/200 series with the spiral staircase they looked almost like an umbrella when deployed. 300/400 series they deploy over the top railing of the staircase. Although how effective they are in preventing smoke from traveling up the stairs is anyone's guess....
-Mike



Brick Windows
User currently offline747Teach From United States of America, joined Nov 2000, 176 posts, RR: 1
Reply 8, posted (10 years 3 months 3 weeks 2 days 4 hours ago) and read 7244 times:

SafetyDude: Lorm's got it. Most of the 747's have some sort of fabric barrier device at the top of the stairs to keep smoke out of the upper deck. Nothing in any reference I have for any "metal panel" (except for the stair door on the freighters) on a 747 that could block the stairs. Early 747's had a dumbwaiter to the left of the spiral stairs so the attendants in the forward main deck galley could move the meal trays up to the upper deck galley without carrying them up that tiny spiral staircase. When in use, it projected down from the ceiling in the main deck galley. Once loaded, it could be run up. On the upper deck, it came up out of the floor between the staircase and the upper deck galley. When stowed, a metal panel closed to cover the floor in the aisle. There was a switch on both decks that could run the lift up, down, and turn it on and off, if memory serves. That's the closest thing I can think of that resembles what you saw. Regards,

User currently offlineSafetyDude From United States of America, joined Sep 2001, 3795 posts, RR: 15
Reply 9, posted (10 years 3 months 3 weeks 2 days 3 hours ago) and read 7236 times:

Thanks for all your replies. What I saw in the movie was definitely metal and hard, so I imagine that Hollywood has been designing planes.  Big grin

-Will



"She Flew For What We Stand For"
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