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Flight 77 FDR data
01-14-2010, 04:17 PM, (This post was last modified: 01-14-2010, 08:50 PM by JFK.)
#1
Flight 77 FDR data
OK, Lets talk about Word 256, Superframe 3, Subframe 4, bits 1-12.
( Superframes are off by 1 in word 256 in the Custom AA DFL 757_3b-1.txt )

This is labeled "ACMS S/W P/N CODE".

[Section Redacted.]

D226A101-3G.pdf refers you to note 2F which reads as follows :
Quote:NOTE 2F ACMS and Mandatory Software Part Number Recording ( 757-1,-2,-3,-3A,-3B,-4 )

ACMS ( optional ) and Mandatory software part numbers shall be recorded in the data frame by using a binary code from 0 to 4095. This code shall be correlated to the actual supplier software part number in the supplier Version Description Documentation (VDD). The code must uniquely identify a software part number or combination of part numbers.
A second option is to broadcast the software part number(s) one character at a time in ISO#5 format continously recording the part number in lieu of a unique code.

The 3 numbers recorded in this parameter throught the entire FDR flight history are :
BCD - 214, 314, 394
Unsigned Decimal - 526, 782, 910

For the .FDR data, Decoder program source code, C# compiler, Generic and custom DFL's ( Data Frame Layout ) go here - http://warrenstutt.com/AAL77FDRDecoder/index.html

NOTE : I thought I found something, but was mistaken... Hence the edit.
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