Below is a quotation from Capt Haynes (of the Sioux City DC-10 crash):
"There are two ways we can get the gear down on the DC-10 with
hydraulic failure. You can put the gear handle down, which manually
unlocks the doors and the doors fall open and the gear just falls out,
because it's been resting on the doors. Or, there's an alternate
method of doing that, when you use no flaps. Because we have four
ailerons on the DC- 10. You fly with the inboard ailerons at high
speed, and then you unlock the outboard ailerons for landing when you
lower the flaps. Well, we didn't have any flaps. So we couldn't
unlock the outboard ailerons. So that's what this alternate gear
method is for. And we talked about this: how do we put the gear down,
and it was suggested, we unlock with the outboard ailerons, with the
alternate gear, because there might be something out there, because we
might be able to get some fluid out there, there might be some trapped
out there. "
Can anybody please explain the bold type?