Investigators are reviewing records of radar and radio communication between the planes and controllers.

Investigators also issued a full transcript of conversations between the pilots and controllers.

It may also suggest ways to improve communication between pilots and controllers.

At 8:57, the following exchange between controllers occurred:"I got some handoffs for you.

This can be used either as a personal reminder or as a form of communication between controllers.

But radio contact between controllers on the ground and pilots in the air was never affected.

It is also the interface between electronic controllers and pneumatic systems.

Terminology between pilots and controllers differed without either group being aware of the discrepancy.

Both radios began spewing out the usual chatter between controllers and pilots.

The excerpts do not include discussions between controllers and other flights.