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MD-11's Gear Maintenance  
User currently offlineSchiphol From Netherlands, joined Jan 2002, 38 posts, RR: 0
Posted (10 years 7 months 2 weeks 4 days 17 hours ago) and read 4436 times:

I have some questions regarding a project about the MD-11's landing gear. We have sorted the whole thing out, but got stuck at one part; the maintenance.

I'm interested in the type of maintenance done on the landing gear. The various checks (line, a, b, c-check etc) are familiar with me, but I have no information on what kind of maintenance is made during these several checks. What kind of maintenance does the gear get at an C-check, and at how much flights/years does the gears need a total overhaul for example? All the details interest me...

Can someone help me out?

Thanks in advantage,

Stefan Wittenberg

4 replies: All unread, jump to last
User currently offlineFr8mech From United States of America, joined Sep 2005, 6709 posts, RR: 16
Reply 1, posted (10 years 7 months 2 weeks 4 days 8 hours ago) and read 4378 times:

Discounting brake and wheel changes the most common task performed is lubrication. Interval? No idea. I can try and find out next week. Never having worked check, I'd assume some dimension checks are done for wear and of course lubrication. So far as I know gear are hard-timed, but again, I have no idea what the interval is.

We also service the struts when required. If we see the strut low (low air) or we get a writeup of an overly bouncy aircraft (low fluid) during taxi, we service. Quite an interesting task on the dual chamber struts that some MD11 have. I've only heard it described, so I woun't even try to describe it myself.

When seconds count...the police are minutes away.
User currently offlineNZ1 From New Zealand, joined May 2004, 2319 posts, RR: 23
Reply 2, posted (10 years 7 months 1 week 9 hours ago) and read 4197 times:

On our fleet of 744, and 763's, landing gear lubrication is carried out every 'A' check or 600 hours. Apart from inspecting fuse pins for rotation, and wheel & brake changes, there isn't much else done to them. As they are a lifed part, they eventually get removed and sent for overhaul. Cannot remember the exact cycles, but our aircraft tend to have their gear changed every 8 years, or thereabouts.


User currently offlineHAWK21M From India, joined Jan 2001, 31875 posts, RR: 54
Reply 3, posted (10 years 7 months 6 days 23 hours ago) and read 4166 times:

Quoting NZ1 (Reply 2):
Apart from inspecting fuse pins for rotation

What Frequency.Is the check under hand torque.

Think of the brighter side!
User currently offlineNZ1 From New Zealand, joined May 2004, 2319 posts, RR: 23
Reply 4, posted (10 years 7 months 5 days 2 hours ago) and read 4112 times:

Pin rotation inspections are done every 3A check or roughly 1800 hours. They don't have to be able to be moved by hand. Sorry, when I said fuse pins I meant the bushes that they sit in. Of course the pin may move, but if the bush has moved and the sealant broken, it could indicate moisture ingress and thus corrosion.


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