As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF CAPT'S AIRSPEED GAVE NO INDICATION, RED AIRSPEED ENUNCIATION SHOWED ON AIRSPEED INDICATOR. SIMULATED AIRSPEED WITH PITOT/STATIC TEST SET AND COULD NOT DUPLICATE DISCREPANCY. CHECKED NR 1 PITOT HOSE FOR MOISTURE, NO MOISTURE FOUND. BLEW OUT NR 1 PITOT LINES FROM ADC END. RE-ATTACHED HOSE. NR 1 PITOT SYTEM LEAK CHECKED GOOD. NR 1 AIRSPEED FUNCTION CHECKED GOOD. MAINTENANCE ACCOMPLISHED IAW MM 34-11-26.