More (unsubstantiated) speculation
Hi all,
This is my first post, and I don't want to get flamed, but would just like to throw this into the discussion.
I worked on the CLAWS SHRID component of the 777 PFC at GEC-Marconi Avionics back in 1994, so like to think I have some sort of connection with the aircraft!!
One theory that I haven't yet seen voiced, is the possibly of EMI affecting the engine management system. I think this is highly unlikely, as EMI more often affects navigational and RF receiver devices. Nevertheless, the proximity of the aircraft to landing presents a scenario whereby there is a high likelihood of passengers activating PEDs during the final approach. As the article in September's 1996 IEEE Spectrum reminds, you don't need an intentional RF emitter such as a mobile phone, to cause interference, either in-band or out-of-band.
As I said earlier, I'm not proposing any theory on the cause of the incident, but just wanted to present another scenario for discussion.