PSA's biggest problem was that a lot of them were flying "balls to the wall" and the ALF502 did not like that sort of treatment.
I only flew the 146 for 19 years so I admit that I have a lot to learn, but, for example, we used to use a TGT limit of 820 degrees in the climb (and allow the N1 to float). In extremis, we would go up to 840 degrees. Certainly, we had the best reliability record of all 146 operators for a very long time.
I only ever had to shut one engine down in all that time and that was an N2 lubrication failure.