on the 737NG QRH , we have 3 non-normal checklist about the stab trim, they are: stabizer out of trim; runaway stabilizer; Stabilizer Trim Inoperative.
my question is about the latter two.when having a stab trim inop, we need to
manually trim the aircraft,
the flap setting for the approach is flap15 according to the NNC.
but when having a runaway stabilizer, it`s a memorized items,if the senario goes like this:
Control column. . . . . . . . . . . . . . . . . Hold firmly
Autopilot (if engaged) . . . . . . . . . . . . .Disengage
the runaway continues:
STAB TRIM CUTOUT
switches (both) . . . . . . . . . . . . . . . . CUTOUT
Stabilizer. . . . . . . . . . . . . . . . . . . Trim manually
when doing the approach ,the QRH does not provide any clue for flap 15 or any other setting ,so defaultly we use the flap 30.
my question is these two stam trim problems both need manual trim, why the flpa setting is different?
thanx~~~