Embraer Phenom 300 yaw damper fail due to loss of GPS signal [pdf]

Re:Embraer Phenom 300 yaw damper fail due to loss of GPS sig... by throwaway_exer on Saturday September 17, 2016 @04:35AM (#12519693)

I have a commercial rating. The HN title is wrong.

What this is saying:

1) If you don't have a yaw damper, then you'll have a rough ride

2) because the autopilot will induce oscillation (dutch roll) after loss of GPS

[ Parent | on HN ]

Re:Embraer Phenom 300 yaw damper fail due to loss of GPS sig... by JshWright on Saturday September 17, 2016 @05:03AM (#12519772)

The HN title is literally the subject of the notice, very slightly paraphrased (abbreviations expanded, etc), so you may want to let the FAA know they got it wrong...

I also think you misread the notice. The report is stating the loss of GPS apparently resulted in the subsequent loss of a number of other systems, including the yaw damper.

[ Parent | on HN ]

Re:Embraer Phenom 300 yaw damper fail due to loss of GPS sig... by throwaway_exer on Saturday September 17, 2016 @05:38AM (#12519841)

I think you're right. The wording about "no yaw damper" would have been clearer as "failed yaw damper" - I guess that's what was meant.

[ Parent | on HN ]

Re:Embraer Phenom 300 yaw damper fail due to loss of GPS sig... by Filligree on Saturday September 17, 2016 @10:22AM (#12520584)

How much oscillation? On a scale from "bumpy ride" to "holy shit my wing's off".

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Re:Embraer Phenom 300 yaw damper fail due to loss of GPS sig... by JorgeGT on Saturday September 17, 2016 @10:43AM (#12520678)

Dutch roll is characterized by a low frequency oscillation, with a period in the order of seconds. So it wouldn't be a "bumpy" ride but a slooow yet continuous, very nauseating oscillation (try to slowly rock forward and backward in your chair).

[ Parent | on HN ]