Explained: Dad of 20-year-old co-pilot in Florida Learjet crash says her final radio calls showed 'she's tough'

The 20-year-old co-pilot Nathalia Gadelha Filgueiras died along with eight others when their Learjet crashed in Florida on Sunday.

NTSB

National Transportation Safety Board, the U.S. agency investigating the crash

overspeed condition

A state where an aircraft exceeds its designed maximum safe speed

co-pilot

The second pilot in the cockpit who assists the captain in flying the aircraft

Learjet

A type of small business jet aircraft, the model involved in this crash

air traffic control

Ground-based personnel who direct aircraft and communicate with pilots during flight