What was found
CHRONIC PITOT-STATIC SYSTEM FAULTS. ALTIMETERS SPLIT. SPLIT IN INDICATIONS BECOME MORE APPARENT WITH INCREASING AIRSPEED AND ALTITUDE. *S/D* LEAKAGE ON THE PILOT STATIC SYSTEM. REPLACED SEVERAL COMPONENTS DURING PROCESS OF TROUBLESHOOTING, INCLUDING: PITOT PROBE, ALTIMETER, AOA SENSOR , LT UPR PITOT PROBE FLEX HOSE. PRESSURIZED THE ACFT WITH 6.0 DP AND TESTED PITOT/STATIC SYSTEM TO 40K FT. SYSTEM LEAKAGE WITHIN LIMITS PER MM. TEST FLIGHT AT 37K FT FOR ALTIMETER VERIFICATION, OBTAINED READINGS: CAPT 37000 FT, FIRST OFFICER 37050 FT, WITHIN LIMITS.