Yes in my FCOM manuals the max ITT for Hotel mode is given as 785 C. We operate the 300 and 320 models with PW120 & 121 engines.
The argument of some captains is that the stator blades and turbine section is cooled unevenly and therefore not good for the life of the engine. Im sure PW would have stated a limitation other than max ITT if elongated hotel operation would be detrimental to the life of the engine.
Happy flying. Cheers.
