Another Question For Warren Stutt, concerning altitude Options

[Craig Ranke CIT]

Warren Stutt,

You must be aware that people are referencing you to suggest that your findings contradict the statements by P4T that the last reported altitude in the NTSB data shows a value too high to hit the light poles and the building.

Are you willing to set the record straight here and at j.ref by publicly agreeing that your findings in the data concerning altitude CONFIRM the findings of P4T that it shows the plane too high to hit the light poles and the building?

[JFK]

Appears being the key word.

I just tried cross referencing with the "Corrected AoA" in the 757_3b_1.txt file, and found those values in most cases being almost exactly double.

The weird thing is that in the D226A101-3G.pdf, that word and corresponding bits ( Word 210, Bits 3-12 ) are assigned to the surge tank sensors.

Anyways I put this together from another 757 manual I found online for a Chineese Airline ( whilst in my quest for ARINC 429 specs ) :

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[wstutt]

Hi JFK,

Appears being the key word.

I just tried cross referencing with the "Corrected AoA" in the 757_3b_1.txt file, and found those values in most cases being almost exactly double.

The weird thing is that in the D226A101-3G.pdf, that word and corresponding bits ( Word 210, Bits 3-12 ) are assigned to the surge tank sensors.

<snip>

I found that if I used the same conversion formula for CORRECTED AOA as is used for INDICATED AOA which produces angles in the range -90 to +90 (which in effect halves the corrected AOA values), then the CORRECTED AOA values are very close to the INDICATED AOA values as you said.

Because of this closeness, it is now my opinion that word 210 bits 3 to 12, contains the CORRECTED AOA parameter rather than the DENSITY L TANK, DENSITY R TANK, DENSITY C TANK and DENSITY S TANK parameters. I will change this in the next release.

Good work JFK! The NTSB decoded that word as the DENSITY TANK parameters as well.

Warren.

[JFK]

Hi JFK,

I found that if I used the same conversion formula for CORRECTED AOA as is used for INDICATED AOA which produces angles in the range -90 to +90 (which in effect halves the corrected AOA values), then the CORRECTED AOA values are very close to the INDICATED AOA values as you said.

Because of this closeness, it is now my opinion that word 210 bits 3 to 12, contains the CORRECTED AOA parameter rather than the DENSITY L TANK, DENSITY R TANK, DENSITY C TANK and DENSITY S TANK parameters. I will change this in the next release.

Good work JFK! The NTSB decoded that word as the DENSITY TANK parameters as well.

Warren.

Perhaps it is time to begin a new DFL sheet as well ?

Edit to add - Especially since the way they botched the numbering of the SuperFrames in word 256 in the 757-3b.txt file.