I understand that the Mk 127 has suffered availability issues including a 3 week fleet grounding in May/June 2019 following an engine issue. Having chosen to upgrade the Hawks instead of replacing them, as part of the upgrade 'The aircraft will now receive an engine upgrade to the latest Rolls-Royce Adour Mk951 standard common to the UK RAF’s Hawk T2 which should alleviate some of the
engine issues and poor availability the fleet has suffered in recent years.' (Source: Australian Defence Business Review February 21, 2022)
(apologies for the repetitive 'upgrade')
