Why Is It Climbing? Republic Airways Flight 4439

Can you figure out what was wrong faster than the pilots on board? I’ll bet most veteran programmers would.

I’ll not say more to avoid spoilers. Here is the U.S. National Transportation Safety Board docket for the incident.


Interesting; and not surprising.

Allegiance to Systems is a disease! Disengage the trim system and hand. fly. the. aircraft!!! (manipulate trim in “snippets” with backup system and both guys watching the indicator).

Trimmed state = an angle-of-attack = an indicated airspeed.

Therefore, if they had REDUCED thrust the nose would have come down(!) Yeah—not likely at night and very counter-intuitive.

They worked through it. Good job!