As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
F/O CADC FAIL LOST AIRSPEED INDICATION F/O SIDE. FOUND F/O'S PITOT TUBE BLOCKED BY UNKNOWN DEBRIS. DISCONNECTED PITOT TUBE AND TRIED PURGING TUBE. DEBRIS WILL NOT DISLODGE. ORDERED NEW TUBE, AWAITING PARTS. F/O'S PITOT TUBE REMOVED IAW AMM 34-11-01-2. R & R F/O'S PITOT TUBE AND PERFORMED A SATISFACTORY OPS CK, REF: AMM 34-11-01.