4 ms·
Yeah, it's a memory item on the 737. Pretty short too. http://www.b737.org.uk/images/runawaystab1975.jpg http://www.b737.org.uk/images/runawaystab1975.jpg Not
by whoknowswhat11 5y ago
Yeah, it's a memory item on the 737. Pretty short too.
http://www.b737.org.uk/images/runawaystab1975.jpg http://www.b737.org.uk/images/runawaystab1975.jpg
Not to mention I think they ran the plane at full takeoff power during the recovery attempt - I can't even imagine what they were doing in terms of speed monitoring (in a nose down you normally reduce power, no go to full takeoff!).
- ummonk 5y agoThe EA crew followed that memory item. It didn't work. (Had they reduced the throttle it probably would have helped, which is why the need to limit speed during runaway trim events has been added to the updated memory item now)
- roelschroeven 5y agoThe pre-MAX 737 has a cut-off switch that switches of the automatic trim system, without also switching of the electric trim (there's another one that switches off the electric trim). The 737 MAX also has two switches, but they both switch off the automatic trim (including MCAS) and the electric trim. So you can't switch off MCAS without also switching off electric trim, leaving only manual trim. But in situations like the Ethiopian flight, you need inhuman strength to control the manual trim (as Mentour Pilot demonstrates in this video: https://www.youtube.com/watch?v=aoNOVlxJmow https://www.youtube.com/watch?v=aoNOVlxJmow). You need electric trim to have any chance to fight MCAS, but you can't enable electric trim without also enabling MCAS. Must be horrific to be in such a situation.
- WalterBright 5y agoThe electric trim switches override MCAS. The LA crew overrode MCAS to restore normal trim 25 times. The EA crew did it twice.