Hi Machinbird,
He got a stall warning and applied what to him seemed like an approach to stall recovery....
I agree & in 2009, there was no stall warning procedure in the QRH.
The guidance was buried in FCOM, Supplementary Techniques, Flight Controls which describes the initial actions which the PF took.
"An aural "STALL, STALL, STALL" warning sounds at low speeds. Upon hearing it, the pilot must return to the normal operating speeds by taking conventional actions with the controls:
Thrust Levers...
TOGA At the same time:
Pitch Attitude...Reduce
Bank Angle...Roll Wings Level"
Unfortunately he then lost the reference power setting he had before the UAS event. I would guess that he recalled the power and pitch attitudes he learned during his conversion course for unreliable speeds and remembered the
TOGA + 15 degs pitch ... (but that doesn't work at FL 375.)
The next bit reads "Thrust/Pitch .... CL/5degs Above FL 100"
but by then they were so very deep into the stall they would have needed at least 10 degs nose down to accelerate.