> At 0000:26, the ARTCC controller advised the flight crew that the airplane was at 13,000 ft msl, 1,000 ft above their assigned altitude. The pilot responded that they were correcting their altitude and that the airplane had lost GPS capability. The pilot stated they would need a heading

> About 0005 the ARTCC operations supervisor contacted [the military] to stop jamming and at 0007:34 ADS-B data recording returned to 2-3 second intervals.

> The flight crew again reported they “[have] a visual on Ruidoso” at 0008:30 and that they could “go visual.”

> About 0010, the ARTCC operations supervisor informed [the military] that the airplane was on a visual approach and that they could resume jamming.

> The airplane impacted terrain about 250 ft southwest of the last recorded data point at an elevation of about 9,950 ft, and about 730 ft east and 230 ft below the Capitan Mountains Summit Radio Facility, located at an elevation of about 10,180 ft.

The image of the map from the report really helps me understand the path. It seems like the aircraft began visual approach and didn't know where it was, or didn't know about the mountain.

Note that after the pilots said that they could go visual the preliminary report documents the following

> The ARTCC controller subsequently cleared the flight to SRR, cleared the flight for a visual approach, and informed them they could cancel IFR in the air above 9,000 ft msl or they could cancel their clearance via the flight service station after landing. The flight crew acknowledged the clearance and responded that they would cancel IFR “in just a couple of minutes.” There were no additional radio transmissions received from the flight crew.

It's not at all clear to me that they did go visual. They communicated that they intended to cancel instrument clearance later and that suggests they were still using it...