What was found
PVD - FLT 310 - ON TAKEOFF FROM DCA, EN ROUTE TO PVD, CREW DETECTED AN ACRID SMELL IN THE COCKPIT. SMELL WENT AWAY EVENTUALLY. CREW REPORTED THAT THEY HAD NO V-NAV, THE FIRST OFFICERS ALTIMETER WAS OFF AND THE AUTOTHROTTLES WERE INOPERATIVE. FLIGHT CONTINUED AND LANDED AT PVD WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED NR 2 AIR DATA COMPUTER. SYSTEM FUNCTIONAL CHECK PERFORMED AND FOUND SATISFACTORY PER MM. (M)