Not of your industry, but:
Where the time stamps are very close together please don't read too much into the sequence of events. It is very difficult to get an accurate sequence for events happening close together because of the time scan of the data logger and (if multiple systems are involved) the difficulty of synchronising the various clocks.
This thread is fascinating and informative, but I suspect (in the absence of anything else) you are using ACARS output for something other than its intended function.