Crashes in history crosswords

to incite (one) to take action
to cause or begin (a chain of events)
a device that automatically transmits a radio signal upon receiving a certain signal.
to plunge, fall, or descend through the air
the people who operate a ship, aircraft, or spacecraft:
to result in success
to replace existing parts, equipment, etc., with updated parts or systems
to fall or descend to a lower level or position
to change direction or course or turn aside
to become unworkable, as through parts being moved out of place, becoming stuck, etc
the cargo compartment of an aircraft
risky, dangerous
the international radiotelephone distress signal, used by ships and aircraft
to order or require, make mandatory
easily set on fire; combustible
a fierce and long public dispute concerning a matter of opinion; argument
an instrument for measuring or testing something (pressure, amount of fuel)
causing distress