A oi - actu
- A oil
- A-bomb
- A-bomber
- A-gas
- a. s. bomb
- A2A emission
- abaft
- abandon
- abandoned aerodrome
- abandoned aircraft
- abandonment
- abate
- abatement
- abbreviated form of message
- abbreviated plain language
- abbreviated precision approach path indicator
- abbreviated visual approach
- abbreviated visual approach slope indicator system
- abeam
- ability
- ability to conduct
- ability to perform
- abnormal case
- abnormal descent rate
- abnormal operating conditions
- abnormal operation
- aboard
- abolition
- abort
- abort ascent
- abort from orbit
- abort once around
- aborted take-off
- abrasion
- abrasion-resistant alloy
- abreast
- abrupt change
- absolute accuracy
- absolute altitude
- absolute ceiling
