Statistics
PBL,
Your comments are very well informed, however I disagree strongly on some of your statistic conclusions.
You calculate that 3 accidents in 54 million landings is not bad for the A-320 system, roughly 1 accident per 17 million landings.
However, if you consider that on the average, the very reliable Airbus will only fly one per thousand flights with a reverser de-activated, there has been 1 accident per 17.000 flights with T/R de-activated, arithmatically speaking. A disturbing rate, I would say.
Moreover, those accidents had nothing to do with degraded landing performance caused by T/R de-activated, they all happened as a result of mishandling the thrust lever of the engine with the thrust lever de-activated. All with Autothrust active untill the flare. A serious issue from Man Machine interface standpoint, I would also say.