Arriel Engine - Engine Life after 30 Sec OEI used
Ladies and Gents,
I have been told 2 different versions of the impact of using the 30 secs and 2 Minute OEI power settings on an Arriel 2 engine and wonder if someone has the definitive answer.
Option 1 - once the 30 secs of OEI power has been used, the high temperatures will have irrevocably damaged the turbine blades and the engine should be removed and refurbished - use of the 2 minute power is more flexible, with a maximum cumulative use of 10 mins before refurb.
Option 2 - the 30 secs power can be used up to a maximum of 10 times before compulsory refurb and the 2 minute power has a cumulative maximum of 20 minutes. The reuse of the 30 sec power is not limited to one flight and all 10 sessions can be used in one flight if required.
It may be that there are other options such simply borescoping the engines to inspect for damage and refurbing or not on condition.
Any thoughts?