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 a-no-n on Saturday September 17, 2016 @05:38AM (#12519843)

There was a cancelled, very large proposed GPS outage (NOTAM) centered on NAWS China Lake which specifically warned that the EMB-505 Phenom 300 business jet specifically should avoid operating in the Western US during this mysterious GPS outage/jamming test event.[0] Pressure from the AOPA and others likely contributed to the scrubbing of this would-be very large outage.[1] It turns out that the EMB-505 300 lateral stability at high speed is extremely dependent on GPS.

Folks on the forums suspect the root cause is related to the Garmin GRS 77/GMU 44 AHRS part of the Garmin Prodigy G3000 package.[2,3]

0. https://www.faasafety.gov/files/notices/2016/Jun/CHLK_16-08_...

1. http://www.ainonline.com/aviation-news/business-aviation/201...

2. http://static.garmin.com/pumac/778_InstallationManual.pdf

3. http://static.garmin.com/pumac/1152_GRS77_GMU44Troubleshooti...

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Re:Embraer Phenom 300 yaw damper fail due to loss of GPS sig... by kaffeemitsahne on Saturday September 17, 2016 @07:23AM (#12520071)

What would be the purpose of this outage?

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Re:Embraer Phenom 300 yaw damper fail due to loss of GPS sig... by colechristensen on Saturday September 17, 2016 @08:13AM (#12520189)

"China Lake is the United States Navy's largest single landholding, representing 85 percent of the Navy’s land for weapons and armaments research, development, acquisition, testing and evaluation (RDAT&E) use and 38 percent of the Navy’s land holdings worldwide. In total, its two ranges and main site cover more than 1,100,000 acres (4,500 km2), an area larger than the state of Rhode Island."

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Re:Embraer Phenom 300 yaw damper fail due to loss of GPS sig... by chiph on Saturday September 17, 2016 @11:43AM (#12520949)

Possibly to ensure that weapons and weapon systems that use GPS will still function in it's absence.

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Re:Embraer Phenom 300 yaw damper fail due to loss of GPS sig... by jonknee on Saturday September 17, 2016 @11:59AM (#12521023)

It's classified, but they may have been testing GPS jamming equipment or other rf tech that has that as a side effect.

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