The flap sequencing on the B744.
F0 all LEDs and TE flaps up.
F1 inbd & midspan LEDs ext, TE flaps up
F5 all LEDs ext, TE run to 5
F10, F20, F25 & F30 LEDs ext, TE flaps as selected.
BTW B744 has inbd, midspan and outbd LEDs, a total of 1 more (each wing) than B747. B747/744 LEDs have one ext position. The 3 inbd LEDs are Krueger flaps, the rest are slats. B747/744 does not have droops, all LEDs extend from under the leading edge through about 150 degrees and are bent to alter camber. B747/744 ailerons do not droop with flap ext.
The B747 hardware is very similar except for programming of LEDs & TE flaps run to posn 1. TE F1 gives a fair increase in area & bugger all increase in camber.
F1 3 LEDs inbd of each eng (ie 6 per wing) ext, TE flaps run out to 1
F5 all LEDs ext, TE flaps run to 5
F10, F20, F25 & F30 the same.
Hope that helps.
