N2,
On your A330 the only time I would think it necessary to exceed the limits is if you were to encounter windshear after takeoff below 400 ft with OEI, or a double engine flameout.
The engine will still perform if the limits are exceeded, but the engine may need to be replaced.
Dont forget to report it if it happends, many times the aircraft will report it for you via ACARS.
The only time I have ever exceeded limits was in the sim when given a double engine flameout at 1500 ft in an airbus, and had a hot start and overtemp on an engine trying to stop the aircraft from gliding and start flying.
