Door Gap On MD-81 Before T/O — Tech Ops Forum

Sponsor Message:


My Starred Topics \| Profile \| New Topic \| Forum Index \| Help \| Search

Door Gap On MD-81 Before T/O

FLY2HMO From , joined Dec 1969, posts, RR:
Posted (4 years 2 months 17 hours ago) and read 3121 times:

I couldn't help noticing the caption of one of today's top pictures:

View Large View Medium
Click here for bigger photo!

Photo © Simon Brygg - Ostersund Photography

I was just curious, as the plane I've flown most often as a pax is the mad dog: will the gap close up once the differential pressure goes up and the door seals press against the fuselage? do most mad dogs do this? (certainly don't remember noticing it in all my other flights) what about other planes?

6 replies: All unread, jump to last

PGNCS From United States of America, joined Apr 2007, 2516 posts, RR: 45
Reply 1, posted (4 years 2 months 16 hours ago) and read 3101 times:

Quoting FLY2HMO (Thread starter):
will the gap close up once the differential pressure goes up and the door seals press against the fuselage?

The gap will close with increasing PSID.

Pilotboi From United States of America, joined Sep 2007, 2366 posts, RR: 10
Reply 2, posted (4 years 1 month 3 weeks 2 days 9 hours ago) and read 2655 times:

Quoting FLY2HMO (Thread starter):
will the gap close up once the differential pressure goes up and the door seals press against the fuselage?

Exactly! That's how it's designed.

Quoting FLY2HMO (Thread starter):
do most mad dogs do this?

Yes. All that I've seen do.

Quoting FLY2HMO (Thread starter):
what about other planes?

I'm sure you can notice it on some others. Most modern planes' doors are flush, but the door is not completely sealed until a difference in pressure is created.

DALMD88 From United States of America, joined Jul 2000, 2366 posts, RR: 15
Reply 3, posted (4 years 1 month 3 weeks 1 day 16 hours ago) and read 2414 times:

When you rig a Maddog door the inital set up only measures the gap for/aft and up/down. The plane is then pressurized and you adjust the stops out until the door is flush. Many times with a new seal they are a bear to shut until it pressurizes a few times.

Boeing767mech From United States of America, joined Dec 2000, 992 posts, RR: 3
Reply 4, posted (4 years 1 month 3 weeks 1 day 15 hours ago) and read 2407 times:

Quoting DALMD88 (Reply 3):
Many times with a new seal they are a bear to shut until it pressurizes a few times.

Just like the aft plug door on a non aft staired DC-9. I don't know how many times we have had to applied kinentic energy while at 8.0 psi Dif. ti get the door to seat right after changing a door seal.

David

Never under-estimate the predictably of stupidty

KELPkid From United States of America, joined Nov 2005, 5934 posts, RR: 4
Reply 5, posted (4 years 1 month 3 weeks 1 day 15 hours ago) and read 2405 times:

Aren't you supposed to be studying for your CFI oral/checkride? Silly

Celebrating the birth of KELPkidJR on August 5, 2009 :-)

FLY2HMO From , joined Dec 1969, posts, RR:
Reply 6, posted (4 years 1 month 3 weeks 1 day 14 hours ago) and read 2389 times:

Thanks for the info guys

Quoting KELPkid (Reply 5):
Aren't you supposed to be studying for your CFI oral/checkride?

Hey I posted this weeks ago...

Now if you excuse me, I'm gonna go procrastinate elsewhere. cheeky

Top Of Page

Forum Index

Reply To This Topic Door Gap On MD-81 Before T/O

Username:	No username? Sign up now!
Password:	Forgot Password? Be reminded. Remember me on this computer (uses cookies)

Tech/Ops related posts only!
Not Tech/Ops related? Use the other forums
No adverts of any kind. This includes web pages.
No hostile language or criticizing of others.
Do not post copyright protected material.
Use relevant and describing topics.
Check if your post already been discussed.
Check your spelling!
DETAILED RULES

Check Spelling

Please check your spelling (press "Check Spelling" above)

Similar topics: