As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN AIRSPEED DROPPED FROM 250 KNOTS TO MINIMUM ON CLIMBOUT. PERFORMED LEAK CHK OF CAPT'S AND FO'S PITOT STATIC SYS IAW IAW 34-11-00, VERIFIED AIRSPEED DROPPED 250 KNOTS AND CAME BACK TO NORMAL. R & R LH ADC AND REPEATED LK CHK, AIR SPEED STABLE AT 300 KNOTS WITH LOSS OF 2 KNOTS IN 5 MINUTES. WITHIN LIMITS PER AMM 34-11-00-795-019.