Why I've been away and why I'm back.

I'm 79yo now.  I receive a state pension which falls short by about £50 a week from what I need to keep paying bills.  I took a break from social media so I could make money from fixing stuff for neighbours.  I also wrote a book about Chinese diesel air heaters - link in my bio.

When Air India 171 crashed I started researching probable causes.  I have been interested in accident investigations since childhood.  I remember news about the 1952 Harrow and Wealdstone rail crash and I remember reading in the Daily Mail about the 1957 Lewisham rail crash.  In about 1960 I came across a book about the loss of the R101, since when I have been fascinated about accident investigations

I was disgusted that a huge majority of people discussing the Air India accident on social media were swift to blame the pilots without a shred of forensic evidence.

The AAIB interim report doesn't blame the pilots.  At least, as a matter of plausible deniability.  But it does clearly state that there are two toggle switches by which the fuel can be cut off, and two pilots.

Now, I know for a fact that there 4 relays per engine, wired in parallel in an electrical version of OR logic.  The truth table for OR logic demonstrates that any 1 of 4 LH relays AND any 1 of 4 RH relays provides for 16 ways that a systems failure could command fuel cutoff on both engines.  There is only one way for the pilots to command it through toggle switches.

The odds against the pilots having deliberately cut off the fuel to both engines are at least
16 to 1.

I have a work in progress which cites the multiple sources which I have researched:

Air India Crash: When 2 + 2 Does Not Compute

[edit]  Link to the article
https://www.science20.com/patrick_lockerby/air_india_crash_when_2_2_does...