Aviation glossary · Lease and transitionLessee
operator
The party operating the aircraft under a lease, responsible for its airworthiness and maintenance during the lease term and for returning it in the agreed condition.
Why it matters
Return conditions are agreed years before they are met, and the work needed to meet them is discovered late — usually too late to be cheap.
In AerSynx
Redelivery readiness is derived continuously from the maintained record, so the gap appears while there is still time to close it. Transitions →