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Feb 12, 2021 at 17:06 comment added ManfP From reading the document, it seems like flaps were not used to communicate a hijacking at all, but rather as a signaling device to tell ATC whether armed intervention is requested after the general situation has already been established (note that retracting flaps after landing is also listed as a signal!).
Feb 8, 2021 at 18:13 comment added Harper - Reinstate Monica Cecelia Cichan might have something to say about making the flaps a last-minute checklist item...
Feb 8, 2021 at 15:00 history tweeted twitter.com/StackAviation/status/1358792726825828355
Feb 8, 2021 at 8:29 history became hot network question
Feb 8, 2021 at 3:52 answer added Peter Duniho timeline score: 28
Feb 7, 2021 at 22:29 comment added Ralph J Note that the second link is to a document dated 40 years ago, and the first link says "was" rather than "is". Lots & lots has changed since 1980, and quite frankly the idea that you've landed at your filed destination & need to covertly communicate that you've been hijacked so you can be met by... somebody... who assembles as you taxi to your assigned parking spot... is a little dubious.
Feb 7, 2021 at 21:42 history edited quiet flyer CC BY-SA 4.0
added 4 characters in body
Feb 7, 2021 at 21:33 history asked quiet flyer CC BY-SA 4.0