What was found
RIGHT AFTER TAKEOFF WINDSHEAR WARNING WENT OFF AND CAPTAINS INSTRUMENTS (AIRSPEED AND ALTIMETER) STARTED READING ERRONEOUSLY. ABOUT ONE MINUTE LATER GOT A SECOND WINDSHEAR WARNING. AT 4000 CAPTAINS ALTIMETER READ 1100 AND AIRSPEED INDICATOR WAS PEGGED AT BOTTOM. *S/D* REMOVED AND REPLACED STATIC LINE ON CAPT IVSI AND PERFORMED FULL RANGE LEAKAGE TEST PER MAINTENANCE MANUAL 34-11-0. NO LEAKS NOTED AND ALL IND NORMAL. REMOVED AND REPLACED GPWS COMPUTER AND TESTED PER MAINTENANCE MANUAL 34-52-00. OPERATIONAL TEST NORMAL.