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DC-8 Landing Gear Doors Open On Ground. Why?  
User currently offlineJeffry747 From United States of America, joined Jun 2005, 963 posts, RR: 2
Posted (7 years 8 months 1 week 4 days 19 hours ago) and read 5437 times:
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I have always noticed that when after a DC-8 (UPS DC-8s in particular) blocks in and shuts down after a flight, the first thing Mx on the ground will do is walk under the aircraft and pop open the main landing gear doors. It is occasionally done on 727s but ALWAYS on the DC-8. The doors will then be left open until the aircraft is started up for its next flight. Why is this done?


C'mon Big B, FLY!
9 replies: All unread, jump to last
 
User currently offlineFr8mech From United States of America, joined Sep 2005, 5657 posts, RR: 15
Reply 1, posted (7 years 8 months 1 week 4 days 18 hours ago) and read 5420 times:

Because there is no way to look in the wheel well with the doors closed. The B727 & the DC8 maintenance program (as UPS operates the aircraft) require that maintenance check certain items in the wheel well after each flight where ground time is in excess of 2 hours. You can easily see into the wheel wells of B727 aircraft. Some will open the doors to check and service the APU oil (on a B727).


When seconds count...the police are minutes away.
User currently offlineHAWK21M From India, joined Jan 2001, 31712 posts, RR: 56
Reply 2, posted (7 years 8 months 1 week 4 days 10 hours ago) and read 5328 times:

To Facilitate Maintenance Inspections as per Schedule.
regds
MEL



Think of the brighter side!
User currently offlineSteve332 From Ireland, joined Feb 2007, 116 posts, RR: 0
Reply 3, posted (7 years 8 months 1 week 4 days 4 hours ago) and read 5258 times:

I done my school work experiance programme at DUB with EI's 330's. We done the same thing and also opened the main gear doors for a daily inspection.

User currently offlineSfomb67 From United States of America, joined Dec 2005, 417 posts, RR: 0
Reply 4, posted (7 years 8 months 1 week 3 days 13 hours ago) and read 5070 times:

[quote=Jeffry747,reply=0]The doors will then be left open until the aircraft is started up for its next flight.

Been awhile since I've shut these doors. They can really have a nasty snap if you release the (door release/closure) handle too fast!



Not as easy as originally perceived
User currently offline747400sp From United States of America, joined Aug 2003, 3758 posts, RR: 2
Reply 5, posted (7 years 8 months 1 week 2 days 15 hours ago) and read 4948 times:

Quoting Fr8mech (Reply 1):
Because there is no way to look in the wheel well with the doors closed. The B727 & the DC8 maintenance program (as UPS operates the aircraft) require that maintenance check certain items in the wheel well after each flight where ground time is in excess of 2 hours. You can easily see into the wheel wells of B727 aircraft. Some will open the doors to check and service the APU oil (on a B727).

Do have to do these maintenance check inj the wheel well of 707s?


User currently offlineHAWK21M From India, joined Jan 2001, 31712 posts, RR: 56
Reply 6, posted (7 years 8 months 1 week 2 days 12 hours ago) and read 4931 times:

Quoting 747400sp (Reply 5):
Do have to do these maintenance check inj the wheel well of 707s

It depends on the Scheduled check due.
regds
MEL



Think of the brighter side!
User currently offlineFr8Mech From United States of America, joined Sep 2005, 5657 posts, RR: 15
Reply 7, posted (7 years 8 months 1 week 2 days 9 hours ago) and read 4908 times:

Quoting 747400sp (Reply 5):
Do have to do these maintenance check inj the wheel well of 707s?

Don't know. The only thing I ever did was service engine oils on B707 aircraft.

Unless something needs servicing, the only thing being done on a DC8 is visual inspection of the various hydraulic components installed in the wheel wells.



When seconds count...the police are minutes away.
User currently offlineMD11Engineer From Germany, joined Oct 2003, 14139 posts, RR: 63
Reply 8, posted (7 years 8 months 1 week 2 days 8 hours ago) and read 4896 times:

Quoting Fr8Mech (Reply 7):
Quoting 747400sp (Reply 5):
Do have to do these maintenance check inj the wheel well of 707s?

Don't know. The only thing I ever did was service engine oils on B707 aircraft.

Unless something needs servicing, the only thing being done on a DC8 is visual inspection of the various hydraulic components installed in the wheel wells.

On the 727 on turnarounds we just lookeed into the wheel well with closed doors, but on weekend checks we had to check the precharge pressure on the brake accumulator and APU oil. For this you'll have to open the L/H main wheel well door.

The 707 has a higher landing gear than the 727. I would need to open the wheel well door on this plane to have a good look. The mechanism for opening and closing the main wheel well doors is the same as on the 727.

Jan


User currently offline113312 From United States of America, joined Apr 2005, 576 posts, RR: 1
Reply 9, posted (7 years 8 months 1 week 1 day 10 hours ago) and read 4790 times:

On the DC8, you inspect hydraulic reservoir and accumulators. On the727, unless maintenance or inspection is required, nearly everything that needs to be seen for preflight can be viewed with the doors closed. However, APU cooling during warm weather can be improved with the right main gear door opened.

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