DUBLIN, Aug 27 (Reuters) - Ryanair CEO Michael

O'Leary said on Wednesday he was "optimistic, but not confident"

that Boeing ( BA ) would meet its target to deliver its first

MAX 10 aircraft by early 2027, and warned the airline's growth

would otherwise "flatline".

O'Leary, whose airline has 150 firm orders for the MAX 10,

the largest jet in the 737 family, was speaking to Reuters in an

interview in London.

(eporting by Joanna Plucinska. Writing by Conor Humphries.

Editing by Mark Potter)