landing gear scenario B737-300

[Jimmy The Big Greek]

Lets say you lost all hydraulics in system A and you performed a manual gear extension. Then suddenly you want to go-around. The quick refence handbook states: When the gear has been lowered manually, it cannot be retracted. The drag penalty with the gear extended may make it impossible to reach an alternate field. BUT

The hydraulic system B powers the LGTU when N2 below 56% and airborne.
If you lower the power on one engine after the go-around to below 56% N2 with complete system A hydraulic failure, will the LGTU activate and raise the landing gear after manual gear extension? Will it be able to lock in the up position?

[alexban]

Well discussed in some threads not long ago.
The answer is : you can not lower the power on engine 1 to 52% N2. Check your N2 during descent,with engines at idle.
The way to do it is to shutdown engine 1 when safe to do it ,this will start the LGTU which will provide hydraulic volume from sys B ,raising the gear at a normal rate.The gear will lock normally.

[Jimmy The Big Greek]

Ok I see sorry.
If I put the aircraft in a climb, will the N2 not go to idle (PMC off)?