727EMflyer From United States of America, joined Mar 2005, 547 posts, RR: 0 Reply 1, posted (8 years 9 months 5 days 2 hours ago) and read 3058 times:
You just posted a picture of one! The answer is yes. Some A320's have them too. There was a thread about this not too long ago, but I couldn't find it in the search. You don't hear much about them because of the proliferation of Jetways, and most are inoperable because the airliners choose not to maintain them (weight, money etc.).
L-188 From United States of America, joined Jul 1999, 29514 posts, RR: 59 Reply 3, posted (8 years 9 months 5 days ago) and read 2926 times:
Yes, depends if the airline spec'd for them.
Actually on the 737 there is the forward door that you see there, and then on combi aircraft there can be a door on the rear exit.
The doors function differently too. The one at the rear, the door is hindged at the bottom to form the top flight of stairs. As you can see on the forward door, it folds up and then retracts into the airframe below the door.
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HAWK21M From India, joined Jan 2001, 31457 posts, RR: 57 Reply 6, posted (8 years 9 months 4 days 13 hours ago) and read 2796 times:
The Airstair on a B737 can be operated from Outside & from Inside provided Entry door is open by using 28vdc or 115vac.
There are Two optng systems involved Normal & Standby.
Standby is dc operated & has not safety swiches on the Handrails,hence if the Handrails are not stored properly it can lead to damage during retraction of the Airstair.
The Sequences involve Position/limit/sequence switches than allow each step to occur in sequence,starting from opening of the Airstair door to Extending of the Airstair.
The outside controls are below aft of the Air stair opening & the Inside control is above the Entry door cutout.
Amtrosie From United States of America, joined Jan 2005, 274 posts, RR: 0 Reply 8, posted (8 years 9 months 4 days 6 hours ago) and read 2717 times:
As stated 737's have them installed during initial build, only if the customer requests. The 737 I maintain did not have them as original equip., so we went to the desert and found us a set and installed them. I know 717 have all the provisions for them, it just differed as to the customer wanting to take on the additional wt. penalties of the installed equipment. Some carriers have them, but choose to deactivate them.
IFIXCF6 From United States of America, joined Sep 2004, 108 posts, RR: 0 Reply 12, posted (8 years 8 months 3 weeks 5 days 1 hour ago) and read 2466 times:
Would you want even the possibilty of a flight if they were not properly stowed prior to door closure? I'm speaking DC9 series stowing of the airstairs, it's just my guess, and I can't speak with regards to the 737.