posted on Mar, 26 2017 @ 08:41 PM
The aircraft was high as they crossed the threshold, and captured a mirror glide slope. The decision to go around was made after they descended below
the 100 foot decision height.
At 25 minutes from the airport, they were 130 nm from the airport, and began descending from 34,000 feet. They were on both the ILS and the VOR/DME
frequencies. They were on a standard TOPKA 1 approach, which put them over both RAXAT and TOPKA waypoints. At RAXAT, they were at 18,000 feet as
required, but at TOPKA, they were at 9,200 feet, not the required 6,000.
They were cleared to descend to 3,400 which they should have reached 5.4 nm from the airport to capture the glideslope at 3.2 nm. The crew was aware
they were high, and were operating in FLCH mode on the autopilot. They didn't reach 3,400 feet until 1.7 nm from the airport, and failed to capture
the glideslope. They captured the false glideslope and began descending as much as 9 degrees, instead of 3 degrees, which is standard. Descent rates
reached as high as 1,425 fpm.
They crossed the far end of the runway at 110 feet, with a 100 foot minimum. The Captain ordered a go around, but they had descended to 58 feet by
that point. Three and half seconds after TO/GA was pressed, the aircraft impacted rising terrain at 165 knots, with a 6G vertical impact.