Moderators: richierich, ua900, PanAm_DC10, hOMSaR
Quoting MD-90 (Reply 2): But how do you relieve the pressure once you get the ground a/c turned off and the cabin is at a higher pressure than the outside air...and the engines aren't turning? |
Quoting MD-90 (Thread starter): which must not be a plug type door because she was petite |
Quoting MD-90 (Reply 2): But how do you relieve the pressure once you get the ground a/c turned off and the cabin is at a higher pressure than the outside air...and the engines aren't turning? |
Quoting MD-90 (Thread starter): a catering delay |
Quoting MD-90 (Thread starter):
Should the outflow valves have opened even if the pressurization system wasn't on? |
Quoting AA737-823 (Reply 4): The whole thing is fishy- the outflow valves are normally logic'ed to go full open during landing rollout. So, it should have already been open, in other words. |
Quoting MD-90 (Thread starter): My question is, once you realize that the cabin is pressurizing due to ground a/c, what do you do about the situation? |
Quoting A10WARTHOG (Reply 9):
Turn off the A/C cart and let the pressure bleed down. |
Quoting EMBQA (Reply 10): Yup...aircraft are not without leaks..and they are allowed. On the Ejet you pressurize up to 5.0 psid.... shut off the APU air, drive the valves closed.. and start a stop watch....record your readings and then graph them out. As long as the are good... the leaks are within limits. I did one once that took almost 30 minutes to bleed down... it was WAY good. ....or on the on the flight deck move the pressurization control switch to manual and drive it open. |
Quoting Tdscanuck (Reply 12): Quoting AA737-823 (Reply 4): ALL aircraft doors are plug-type doors, otherwise they'd explode out at altitude. Not so much...cargo doors are typically not plug-doors. You just need to make sure the latch structure can take the load. |
Quoting AA737-823 (Reply 4): ALL aircraft doors are plug-type doors, otherwise they'd explode out at altitude. Even the overwing exits are plugs. On pressurized aircraft, I mean. |
Quoting Tdscanuck (Reply 12): Not so much...cargo doors are typically not plug-doors. |
Quoting PGNCS (Reply 13): This is not a correct statement. |
Quoting MD-90 (Reply 14): GA aircraft doors typically aren't plug doors either. |
Quoting Jetstar (Reply 15): Looking at the picture of the CRJ in the original post, the first picture shows passengers boarding via the air stairs, that is not a plug door |
Quoting Jetstar (Reply 15): Hawker’s and the Lockheed JetStar, on the Hawker, |
Quoting Jetstar (Reply 15): Challenger series has used non plug main doors. |
Quoting AA737-823 (Reply 16): And the NA Saberliner.... MAN, what a pain in the neck, that one. |
Quoting AA737-823 (Reply 16):
Quoting PGNCS (Reply 13): This is not a correct statement. Okay, name for me an airliner of decent size (I work on 737s and 747s, so I typically consider anything smaller just a toy) that has MAIN CABIN (again, topic at hand...) DOORS that are not plug-type. |
Quoting AA737-823 (Reply 16): The 737s with aft exit stair-equipped doors are certainly plugs, |
Quoting AA737-823 (Reply 16): Okay, name for me an airliner of decent size (I work on 737s and 747s, so I typically consider anything smaller just a toy) that has MAIN CABIN (again, topic at hand...) DOORS that are not plug-type. |
Quoting AA737-823 (Reply 16): Quoting Tdscanuck (Reply 12): Not so much...cargo doors are typically not plug-doors. I was referring to pax entry doors, considering that's what is actually being talked about. But I'll count on you to nitpick in the future. Quoting PGNCS (Reply 13): This is not a correct statement. Okay, name for me an airliner of decent size (I work on 737s and 747s, so I typically consider anything smaller just a toy) that has MAIN CABIN (again, topic at hand...) DOORS that are not plug-type. |
Quoting Dragon6172 (Reply 27): Was the aft stairway on the 727 plug type? |
Quoting Starlionblue (Reply 26): BTW I'll pretend to be the Clicker and ask you all what door on the DC-9 is not plug type. |
Quoting PITIngres (Reply 29):
Quoting Starlionblue (Reply 26): BTW I'll pretend to be the Clicker and ask you all what door on the DC-9 is not plug type. I don't have a clue, but given the way you phrased it I'm gonna guess the tail cone! |
Quoting AA737-823 (Reply 16): Okay, name for me an airliner of decent size (I work on 737s and 747s, so I typically consider anything smaller just a toy) that has MAIN CABIN (again, topic at hand...) DOORS that are not plug-type |
Quoting MD-90 (Reply 20): Do any pressurized Cessnas, Pipers, or Beechcraft have plug doors? Pretty sure they don't, although I've never researched it. |
Quoting PGNCS (Reply 18): I am unsure about the 73NG overwing exits. |
Quoting Lincoln (Reply 24): Borderline off-topic but I'm 99% sure that the over-wing exits on the 737 NG (e.g. the spring loaded "gull wing" doors) are not plug type |
Quoting BAe146QT (Reply 19): I'm a little confused here. I thought that the optional airstairs on a 732 were an entirely different assembly to the door, (which as you say is of the plug type). |
Quoting AA737-823 (Reply 32): Quoting PGNCS (Reply 18): I am unsure about the 73NG overwing exits. Quoting Lincoln (Reply 24): Borderline off-topic but I'm 99% sure that the over-wing exits on the 737 NG (e.g. the spring loaded "gull wing" doors) are not plug type 737-NG overwing exits ARE plug-type doors. I've just been through six weeks of gen-fam training. Trust me. They actually open DOWNWARD, PGNCS, and they spring out and up! Interesting design. Makes closing them very tricky if you don't know what you're doing. |
Quoting Starlionblue (Reply 26): BTW I'll pretend to be the Clicker and ask you all what door on the DC-9 is not plug type. |
Quoting AA737-823 (Reply 16):
But I'll count on you to nitpick in the future. |
Quoting Jetstar (Reply 15):
Looking at the picture of the CRJ in the original post, the first picture shows passengers boarding via the air stairs, that is not a plug door, its just that the structure around the door frame is very strong and the latches are designed to hold the door closed. |
Quoting JetMech (Reply 36): Does the CRJ door slide axially to provide the final locking? Assuming it does slide axially, it thus appears to be similar in design to Airbus and B777 passenger doors as well as the rear 767 cargo door. That is, all these doors hinge toward the fuselage, and then slide axially such that the door fittings slide behind the doorway fittings. |
Quoting Starlionblue (Reply 35): Quoting PGNCS (Reply 33): Quoting Starlionblue (Reply 26): BTW I'll pretend to be the Clicker and ask you all what door on the DC-9 is not plug type. The forward stairway door? Do I win a prize? No but I can give you a hurrah: "HURRAH!" |
Quoting JetMech (Reply 43): I see, thanks for the info! How many locking elements are there in total? What delta P is the door rated for? Regards, JetMech |
Quoting Ballpeeen (Reply 45): I think if you open the pax door handle to the first detent (from the outside), it will open the overboard cool valve. |
Quoting AA737-823 (Reply 16): Okay, name for me an airliner of decent size (I work on 737s and 747s, so I typically consider anything smaller just a toy) that has MAIN CABIN (again, topic at hand...) DOORS that are not plug-type. |