we have a general lack of awareness of the impact on fatigue life of flaps and associated structures of routinely operating close to the flap placard speeds.
The manuals are clear on a TYPICAL radar vectored approach... don’t use flaps as speedbrakes, descent clean where poss, second stage of flap a few miles before the loc etc.
I have calculated the basic loading on a retracted 787 flap system to be 20 Tonnes at 170 Tonnes landing weight. How do I calculate the increased loading at flap 30 / 170 knots. Rule of thumb is fine as I suspect this is hugely complicated in terms of certification type calls. Thanks in advance