The aircraft leasing firm had previously announced the Boeing acquisition in March, which now takes its portfolio to 47 aircraft and expands its customer list to 17 airlines in 13 countries.
The plane is currently on lease to Indonesian airline Garuda until mid-2022.
Avation's Executive Chairman, Jeff Chatfield, said the aircraft was a successful and popular model with a “strong residual value outlook".
In a separate announcement, the company said it had delivered the ATR aircraft to Cebu at the manufacturer’s facility in Toulouse.
In lunchtime trading on Friday, Avation shares were 0.5% higher at 289p.