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...