US-based lessors Aircastle Ltd have announced the resignation of COO David Walton.
Walton will remain in his current roles until a succession plan is complete.
Aircastle CEO Ron Wainshal said: "Dave has been a great teammate and played an important role in Aircastle's development over the years and we wish him much success in his future endeavors. We have a talented and deep team that is ready to step up and allow the company to continue to succeed.