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That's true, though IIRC there happened to be an extra pilot in the cockpit that identified the issue. Obviously, that is not something one should rely on. Fu
by FabHK 6y ago
That's true, though IIRC there happened to be an extra pilot in the cockpit that identified the issue.
Obviously, that is not something one should rely on.
Furthermore, pinpointing the issue is not trivial. The crew had a whole slew of EICAS messages and callouts to handle. Clearly, the fact that another machine came down even after this accident chain and the Emergency AD was publicised shows that the "revert trim to neutral and activate the stab trim cutout" checklist items were insufficient.
- WalterBright 6y ago> that is not something one should rely on Dealing with runaway stabilizer trim is something one should be able to rely on the pilot to do. The cutoff switches are deliberately placed prominently on the center console. They are supposed to be a "memory item", meaning shouldn't need a checklist. There's clearly a training problem. > the Emergency AD ... insufficient Please read the bit I quoted. Neither crew followed that 2 step process. Both the LA and EA crews restored normal trim multiple times. Both failed to cut off the trim system after restoring normal trim. The LA crew that safely landed restored normal trim and then cut off the trim system. These are not my opinions, they're facts.
- FabHK 6y agoI agree that none of these accidents would have happened if the crew had rapidly identified the problem, neutralised stab trim, and then switched the stab trim cutout. Yet the two accidents did occur. You know enough about aviation to understand that the entire system ought to be analysed in case of accident. Saying “pilot error” and blaming the pilots (who conveniently cannot object) is insufficient in preventing further problems.