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B737 Main Gear Door Ques  
User currently offlineMikeclod From United States of America, joined Dec 2001, 272 posts, RR: 0
Posted (12 years 4 months 1 week 4 days 15 hours ago) and read 3113 times:

I was rereading a manual this week when I noticed an update that requires you to close the "main gear inboard door" before you overwing fuel it. Now I'm 99.9% sure the B-737 does not have an inboard main gear door, what are they talking about? Also, where would it be? Am I crazy or did the writers mess up?
Also, why would you need to do this? It also states you need to do this on the B-727.
Thanks for your help,
Mikeclod

13 replies: All unread, jump to last
 
User currently offlineJETPILOT From United States of America, joined May 1999, 3130 posts, RR: 29
Reply 1, posted (12 years 4 months 1 week 4 days 14 hours ago) and read 3036 times:

I never heard such a thing. What's your company say who handed out the manual?

JET


User currently offlineMikeclod From United States of America, joined Dec 2001, 272 posts, RR: 0
Reply 2, posted (12 years 4 months 1 week 4 days 14 hours ago) and read 3035 times:

Actually, it was a Delta Fueling manual.
Figure that out........lol
Mikeclod.


User currently offlineShaun3000 From United States of America, joined Mar 2002, 445 posts, RR: 0
Reply 3, posted (12 years 4 months 1 week 4 days ago) and read 2994 times:

Ya got me, unless they are talking about the overwing door, and are using the landing gear as a reference point... but that doesn't make any sence. A) Why not just say overwing door? B) These are emergecy exits, so they wouldn't be open, anyway, during normal operations.

User currently offlineJETPILOT From United States of America, joined May 1999, 3130 posts, RR: 29
Reply 4, posted (12 years 4 months 1 week 4 days ago) and read 2975 times:

The only thing that I could think of is that the gear doors may contact the ground on the 727 as the plane is filled?

But then again I don't think passengers are allowed on board during overwing fueling ops. So the plane wouldn't be that heavy....

Just letting you in on my thought process....

JET


User currently offlineL-188 From United States of America, joined Jul 1999, 29795 posts, RR: 58
Reply 5, posted (12 years 4 months 1 week 3 days 23 hours ago) and read 2961 times:

NO pax is just a military requirement. Fueled plenty of A/C with pax on board....

I haven't a clue what it refers too. Never had to overwing a 737 or 727.



OBAMA-WORST PRESIDENT EVER....Even SKOORB would be better.
User currently offlineCdfmxtech From United States of America, joined Jul 2000, 1341 posts, RR: 27
Reply 6, posted (12 years 4 months 1 week 2 days 11 hours ago) and read 2927 times:

What's up bro. In ther last week, you've found a B737 that transfers fuel without the defuel valve open and a B737 with Main Gear Doors.

What airlines are you fueling...lol


User currently offlineMikeclod From United States of America, joined Dec 2001, 272 posts, RR: 0
Reply 7, posted (12 years 4 months 1 week 2 days 1 hour ago) and read 2889 times:

The transfer one was on a United, and this one was in a Delta Fueling manual. One of those weeks!
Mikeclod


User currently offlineHAWK21M From India, joined Jan 2001, 31679 posts, RR: 56
Reply 8, posted (12 years 4 months 1 week 1 day 5 hours ago) and read 2871 times:

The caution prior to opening the Overwing Refueling port on a 737 is to ensure the Wing tanks arn't full by pressure fuelling,as it can cause spillage when the overwing port is opened.
The Door has no relationship to the Overwing port.
regds
HAWK.



Think of the brighter side!
User currently offlineFltMech9 From United States of America, joined May 2001, 57 posts, RR: 0
Reply 9, posted (12 years 4 months 1 week 22 hours ago) and read 2848 times:

I don't know of any B737 with inboard MLG doors. I do know that the DC-9 fueling checklist the military uses, requires the inboard gear doors to be up for all refuels. The doors and hinges can be subject to stress if they are touching the ground during refuels.

User currently offline747Teach From United States of America, joined Nov 2000, 176 posts, RR: 1
Reply 10, posted (12 years 4 months 1 week 10 hours ago) and read 2830 times:

Mikeclod:
As you may know, very early model 737 aircraft had a "rubber doughnut" that would inflate when the main gear were up and locked to seal the area between the tire and the fairing. After a few instances of the doughnut inflating while the tire was still rotating (which of course pulled the doughnut out of the wheel well), most operators decided the gain in aerodynamics wasn't worth the problems maintaining the doughnut, and removed it. That's the configuration you see today. Around 1980 or 81 I took a close look at a privately owned 737 in Miami which had a full set of main gear doors. They looked exactly like the main gear doors on a 727. That's the only 737 I've ever seen with main gear doors. The doors were open when I looked at it, and it could be possible that a heavy fuel load would put the doors very close to the ground, hence the caution about closing the doors before refueling. Perhaps someday someone will spot that 737 and get a picture. Regards,


User currently offlinePeterba69 From United States of America, joined Mar 2002, 70 posts, RR: 0
Reply 11, posted (12 years 4 months 1 week 5 hours ago) and read 2798 times:

Correct me if I'm wrong, but I seem to remember Boeing replacing those rubber doughnuts with simple brushes that effectively seal the wheelwell and were very maintenance friendly. Personally, I've never seen any 737's w/ mlg doors.

User currently offlineShaun3000 From United States of America, joined Mar 2002, 445 posts, RR: 0
Reply 12, posted (12 years 4 months 5 days 17 hours ago) and read 2787 times:

Peterba69,

It just so happens I was standing in the main gear wheel well of a Delta 737-400 last Friday (4/26)

In place of the doughnut was a giant O-ring, of sorts. Not brushes. It was cut into sections, each probably 4 inches long. (it is in sections to allow the wheel to pass through. A solid ring of rubber would rip upon the first gear retraction)

On the outer wheel of each main is a large hubcap with a groove on the wheel side. When the gear retract, the rubber pieces fit into the groove on the hubcap, creating a seal. At least that's what I gathered from the Delta mechanic.


User currently offlinePeterba69 From United States of America, joined Mar 2002, 70 posts, RR: 0
Reply 13, posted (12 years 4 months 5 days 5 hours ago) and read 2773 times:

Cool. It's been about 11 yrs since I got to climb around one of WN's 737's and it was a -200 which had brushes. It also had a "hubcap" on its outboard wheels w/Boeing logo embossed, but no grooves.

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