Timeline for Why are on-board computers allowed to change controls without notifying the pilots?
Current License: CC BY-SA 4.0
6 events
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| Mar 27, 2019 at 21:31 | comment | added | mike | "the pilots could not have been unaware of them acting". However, the Speed Trim System also adjusts the trim automatically. So they could have very well thought it was the STS adjusting the trim, which is relatively harmless. | |
| Mar 27, 2019 at 10:20 | comment | added | user | @Harper "that explains the heavy yoke" I've had that happen to me during a training flight when the instructor (very likely inadvertantly; this was from rather touch-sensitive buttons on top of the shared control stick) changed the trim setting to, IIRC, full nose down. My first reaction when taking the controls back and trying to maintain level flight was along the lines of "damn, that's heavy!". Despite having only like 15-20 hours at the time, my first reaction beyond the immediate need of establishing positive control was to look over at the trim, and sure enough it indicated an extreme. | |
| Mar 27, 2019 at 4:55 | comment | added | Harper - Reinstate Monica | Well, the actual position of the trim surfaces is plainly displayed right next to the Annoying Clackey Thing. If they even looked to see where the sound was coming from, they'd be going "wow, that's an awful lot of up-trim", that explains the heavy yoke". Then when they trimmed it back, they'd hear Clacky Thing again and "Enough!" switch off or just stop the trimwheel with your knee. It really looks like more a problem of green pilots who have spent all their flying hours pushing buttons on highly automated airplanes. The automation cocks up at all, and they have no idea what to do. | |
| Mar 25, 2019 at 19:36 | comment | added | Cpt Reynolds | They were also unaware of that specific trim function sponsored by MCAS which probably wasn’t particularly helpful in fault diagnosis. | |
| Mar 25, 2019 at 19:35 | review | First posts | |||
| Mar 25, 2019 at 20:09 | |||||
| Mar 25, 2019 at 19:33 | history | answered | 42- | CC BY-SA 4.0 |