A Sukhoi superjet 100 is missing

[PJ2]

Couple of points regarding the report...

Below is a summary of the main crash site coordinates, with sources, (copy/paste into your browser examine original sources).

Interestingly, the Indonesian NTSC has two different coordinates in their "Immediate Recommendations" document and their "Preliminary Report" document.

The estimate from PPRuNe member sledge1984 coincides very closely with Sergei Dolya's estimated position and the NTSC Preliminary Report position.

The estimate from mcgyvr61 which had the aircraft flying up the valley and striking the almost-vertical face is, to me, the most viable crash site estimate. I believe this because the terrain on the east side of the valley, is not an "85deg" vertical face as seen in crash-site photographs, and Google Earth images which seem to fit the site photographs.

The discussion on TAWS by A Van (with some contributions by others) is a must-read if only to further understand the workings and limitations of TAWS/EGPWS and T2CAS.

There are a number of theories which have been discussed in the thread concerning the TAWS - that it was intentionally ignored/turned off, that it may not have had database information for the area, or, according to A Van, may possibly not have had sufficient "granularity" to sense the mountain peak, (you have to read the post and take a look at the links to understand this interesting and important point).

The preliminary report makes no mention of the TAWS so we will have to wait for the final report.

First, a contour map supplied earlier in the thread:



Here's an image summarizing a few of the crash site estimated coordinates, with sources:

NTSC Immediate Recommendations document crash site coords

NTSC Preliminary Report crash site coords

Dolya/Map crash site coords

PPRuNe mcgyvr61 probable crash site coords

PPRuNe Sledge1984 est crash site coords