preflight

Short definition from Wiktionary

Adjective

1. 1
   Taking place before the start of a flight.
2. 2
   Serving to confirm that requests can be accepted, before sending an actual request.

Noun

1. 1
   An inspection of an aircraft before the start of a flight.
2. 2
   The portion of the movement after launching from the springboard but before pushing off the vault.

Verb

1. 1
   To perform an inspection of an aircraft before the start of a flight.