As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) S76 REQUIRES A NON-STANDARD PITOT PRESSURE TO ACHIEVE CALIBRATION OF THE AIRSPEED INDICATOR. SUBJECT INDICATOR WAS FOUND TO BE IN PERFECT CALIBRATION WITH STANDARD PRESSURE APPLIED. WITH THE RECOMMENDED PRESSURE APPLIED, THE AIRSPEED ERRORS WERE WELL IN EXCESS OF THE ALLOWABLE TOLERANCE.