400,
Not always. We had an early 76A which had an engine failing Power Assurance, but a calibration check gave us an almost identical temperature overread (about 60C, IIRC) on each engine. Same calibration error with our other S76, so we were instructed by our black hand gang to fly to a higher T5 than indicated on all four engines.
Needless to say, after a month or so of bickering, the test equipment was found to be faulty, and the duff donk was removed post haste. The implications of constant overtemping was thankfully not an issue, since we ignored the engineer's instructions just this once
