As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AIRSPEED INDICATOR WAS FOUND TO BE IN CALIBRATION WITH STANDARD PRESSURE, HOWEVER, SIKORKSY S76 REQUIRES A NON-STANDARD PRESSURE TO BE APPLIED TO ACHIEVE THE SPECIAL CALIBRATION FOR THIS AIRCRAFT. ERROR IN EXCESS OF THE ALLOWABLE TOLERANCES WERE EVIDENT ON INITIAL TEST.