ATR 72 Notch detent not able to keep up with Cruise speed (AAU4)

[A220driv3r]

ATR Underpowered at Cruise Power (Post-AAU4)

ISSUE DESCRIPTION Description of the issue: When at cruise and the aircraft is set to maintain cruise power the maximum attainable speed is ~25 knots below the targeted speed per the FMC. FREQUENCY OF ISSUE How often does this occur for you (Example: Just once, every time on sim load, intermittently)? Every time. REPRODUCTION STEPS Please list clear steps you took in order to help our test team reproduce the same issue: Reach cruise altitude Set power management setting to cruise (CRZ) …