What was found
WHILE IN CLIMB OUT PHASE AT FL 240, AURAL WARNING TONE SOUNDED MULTIPLE TIMES, ACFT PITCHED UP UN-COMMANDED & VERTICAL SPEED INCREASED BY 2200 FPM. CREW SWITCHED TO VS MODE & REDUCED PITCH. NO EMER DECLARED, NO FURTHER INCIDENT. CLEANED & RESEATED THE NR 1 & 2 IAC CONNECTORS & PURGED THE PITOT LINES. LEAK CHECKS ON THE PITOT & STATIC SYSTEMS IAW FAR 91.411. ALSO PERFORMED FGC VERTICAL SPEED TESTING & AUTOPILOT TO FGC INTEGRATION TESTS IAW MM 34-25-01. TESTS CHECKED GOOD.