As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPT AND F/O AIRSPEED AND ALTITUDE DISAGREES (30-50 KTS SLOWER ON F/O'S) 2,000 FT LWR ON F/O'S. WHEN F/O WENT TO ALTERNATE, IT TRIPPED THE CADC OFF LINE. CAPT'S NUMBERS APPEARED CORRECT, F/O'S APPEARED INCORRECT. FOUND STATIC LEAK AT FLEX HOSE TO ALT ALERT IND. REPLACED HOSE AND IND. REPLACED ADC. PUMP-UP PITOT-STATIC LEAK CK OK.