As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: STANDBY AIRSPEED 100 KNOT LOW AT CRUISE. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT DFW. PERFORMED FIM 34-00-00-810-863 AND ACCOMPLISHED ALTERNATE PITOT SYSTEM FLUSH, PER AMM 34-11-00. LEAK CHECK GOOD. ISFD MATCHED TESTER AT 300 KNOTS, OPERATIONAL CHECKS GOOD.