that tone chance around 42 seconds heard in this video is when the autothrottle switch is engaged.
in this video you can break down the throttle sequence in pieces.
from when the video starts, the throttle position is in IDLE.
then at the first chance of pitch, the pf moves the throttles from IDLE to Flight idle to get the initial spool up.
there after he slowly starts to increase throttle position to get to EPR 40% (where you stabelize engines and turn on autothrottle), but here in this range he received the Takeoff warning stating: FLAPS. letting you know that your flaps/slats are not in the correct position. they quickly put the flaps, noticing the CAWS (Central Aural Warning System) went silent; takeoff config is good, and then proceeded with autothrottle to takeoff power.
from what i see in this video, that the crew that day did miss several boeing recommendations. on taxi out, they were supposed to set flaps. in the taxi out checklist they should confirm flaps by doing a takeoff config test, and the before take off checklist as well with a visual gauge check.
they probably didn't do ANY checklist on this particular flight.
Atleast not an "post-spanair crash md80 checklist".
