Originally Posted by
umms31
If ABNORMAL or EMERGENCY situation dictates to use landing gear during emergency descend- it’s CPT responsibility to use all available sources and actions to meet emergency (FCTM - non normal OPS, QRH- GEN/ NNC usage).
It is a rapid descent explained in the maneuvers section of the FCTM. There is no "request" of Boeing to go "beyond the scope of the NNC" for an emergency descent. You would fail your recurrent check if you don't know how to apply it correctly.
Speedbrakes beyond Flaps 15 has nothing to do with landing gear limitations. There is a limitation you cannot go beyond flight detent in flight, there is a limitation you cannot use speedbrakes below 1000ft _RA_.
Big takeaway that might one day save your life: FDM TRIGGERS ARE NOT LIMITATIONS. Otherwise you can't even go-around. Triggering an FDM might one day avoid you get into deep ####. Triggering limitations means you are already are in deep #### as Boeing does not guarantee anything.