As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF ROLL, CAPTAINS AIR SPEED AND ALTIMETER FAILED. AFTER AIRCRAFT WAS LOADED IN RAIN SHOWERS. NR 1 AIR DATA COMPUTER CIRCUIT BREAKER POPPED. RESET CIRCUIT BREAKER AND RAN OPERATIONAL CHECK PER MAINTENANCE MANUAL 34-12-0 PAGE 509, OPERATIONAL CHECK GOOD. LOWER ELECTRICAL COMPARTMENT WAS CHECKED FOR WATER BEFORE DEPARTURE AND WAS FOUND TO BE DRY. AIRCRAFT DOWN GRADED TO CHECK CAT 2.