As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:NA*EMERGENCY DECLARED* AIRSPEED UNRELIABLE ON CAPT SIDE AT FLT LVL 250. CHECKLIST RESTORED CAPT INSTS BY USE OF "AIR DATA" SWITCHMCDP FAULT 210401 ADC SYST L FOUND. R&R LH AIR DATA COMPUTER IN REF TO AMM 34-12-01. BITE CHECK GOOD AT THIS TIME. IPC 34-12-01-01