737 Oleo extension
 

Done a search to no avail. What is the minimum oleo extension, (mains and nose) required for despatch on the 737?

Thanks

MA

In our Ops Manual it merely states "not fully compressed". I can't find a simple answer in the engineering instructions (1260 pages) but a graph in there would suggest 6.5cm is in the middle of the normal band. No mention of a minimum, however.

My ruer is that if you can see any shiny metal (the chrome plating) then you are OK. If you look on the leg there is a graph which shows the length against the pressure. Except for a B747 which has pressure gauges, you wont know the pressure unless a tech attaches a gauge for you and measures it. But if you can see shiny metal, the leg hasn't collapsed and will still work.

I guess you could do the Cessna 172 test then, if the oleo is extended more than 3 fingers wide your ok! :ok:

Graph for 737Classic is located on LH side of NLG wheel well for nose and on RH side MLG w/w for main absorbers. Graph attached directly on leg shows tyre pressure relation.

Photo showing location of MLG serv chart here

There is a oleo pressure v/s extension chart in the wheel well.One needs to refer to it to get the exact extension.However 3-4 inches of chrome should be adequate with aircraft fully loaded at a transit station.
regds
MEL

Empty a/c with 2 to 4 k fuel o/b - 3 to 4 fingures width ie your hand is about right. Fully loaded fuel/pax etc around half of that.

If the Air/Oil mixture is not balanced.ie less fluid then the extension will vary as per load & considerably...Servicing would be needed.
regds
MEL