APU inop risks

[Wing Root]

Originally Posted by gordonfvckingramsay

Because it was switched on and it worked.

Indeed

The captain's swift and thoughtful action in immediately activating the APU also contributed to the successful ditching because the APU allowed the fly-by-wire system to remain in Normal Law. Without the APU, the aircraft would not have descended with the flight envelope and stall protections that Normal Law afforded. These protec-tions proved especially crucial because the aircraft entered al-pha-protection during the final approach, and the system may have kept the plane above the stall speed during the last 150 feet of the descent.

Got any ideas?