What was found
IMMEDIATELY AFTER TAKEOFF FROM SLC, LEFT AND RIGHT IAS MESSAGES APPEARED FOLLOWED BY STALL FAIL, MACH TRIM ALSO HIGH PITCH NOISE FOLLOWED BY VERY UNRELIABLE AIRSPEED INDICATION FROM CO-PILOTS AIRSPEED INDICATOR. AS AIRCRAFT SLOWED DOWN, LOUD NOISE WENT AWAY. RETURNED TO SLC. PITOT STATIC OPS CHECKS PITOT STATIC SYSTEM IAW MM 34-11-00. VERIFIED PITOT STATIC DRAINS CONTAINED NO WATER. UNABLE TO DUPLICATE SYSTEM FAILURE OR HAVE ANY HIGH PITCHED NOISES.