FAA Issues Seat Switch Guard AD For 787s

The FAA has issued an AD ordering operators of all models of the Boeing 787 to inspect the flight deck seat switches in response to the sudden forward pitch of a Dreamliner off Australia last March that hurt 50 people. The sudden dive occurred when the captain's seat experienced an "uncommanded horizontal movement" causing the yoke to be pushed forward. Unbelted passengers and crew were thrown about the cabin and some were injured seriously. The FAA said that since the March incident there have been at least five other reported instances of trouble with the switch.


This is a companion discussion topic for the original entry at https://www.avweb.com/aviation-news/787-seat-switch-ad

How long have 787’s been flying? This is the first I have heard of this incident. Surely there can be a better switch arrangement, that an attendant with a snack won’t possible kill everyone onboard.

Why is seat travel not limited to prevent the seat from hitting the yoke?

I’m guessing you’re correct in that certification requirements probably do limit the seat from hitting the yoke. However, pilot dimensions are less regulated.

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I recall the possibility being raised that the pilot’s snack tray may have been the link between the pilot and the yoke.

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The obvious answer to this bizarre incident, and to prevent anything similar from happening again, is to locate the seat switches on the outboard ide of the seat, so that they are accessible only to the person sitting in the seat.

There is such a switch that the seat occupant uses. The seat back switch is used to reposition the seat when empty - I think for searing ease.

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As I recall, the switch itself loosened to the point where it raised to the point where something like a crew meal tray could trip the switch.

Details, details… and need for sharp eyes in maintainers and pilots.

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