RE: AA77 Radio transcript
Following the link provided by Rob (above) to the NTSB, I had a quick read of the audio/ATC transcript for AA77.
What immediately struck me was the 5 and a half minute gap in-between the last acknowledgement from AA77 and the next recorded transmission from ATC.
Gaps in themselves are not cause for alarm BUT
the next transmission from ATC is peculiar. (disclaimer: I believe this to be a Full
transcript of the audio between ATC and AA77)
You will notice that throughout the flight thus far, whenever ATC addresses AA77 it is in the form "American seventy seven.....instruction to do something"
followed by an acknowledgement from AA77.
Here we have a 5 1/2 minute silent period and THEN
"American seventy seven Indy".
From my experience, a call worded like this implies that ATC is making a repeated call to the aircraft after
a failed attempt to raise them. (ie after a call like
"AA77 contact center on...." / or " AA77 request?" etc. etc.)
Experience tells me that ATC had already made a call or calls to AA77 in this 5 1/2 minute period or AA77 had made calls to ATC........it appears something is amiss.
Do we know why ATC was calling them at that particular time using that particular phraseology? (remember that all radio dialogue has set standard phraseology).
This phraseology implies there are missing calls
in the 5 1/2 minutes. What were they??????? Why delete them??????