What was found
RETURNED TO IAD DUE TO THE CAPTAIN AIRSPEED INDICATION PROBLEM. ATTRIBUTED TO A FAILED MACH AIR SPEED INDICATOR. REPLACED INDICATOR.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
RETURNED TO IAD DUE TO THE CAPTAIN AIRSPEED INDICATION PROBLEM. ATTRIBUTED TO A FAILED MACH AIR SPEED INDICATOR. REPLACED INDICATOR.