What was found
DURING TAKE OFF, CAPTAIN`S AIRSPEED FAILED. STANDBY AND FO`S NORMAL . AFTER TAKEOFF, RECEIVED A MASTER CAUTION, LT & RT EEC, RUDDER RATIO, AILERON LOCKOUT. THE FLIGHT DECLARED AN EMERGENCY AND RETURNED TO FIELD WITHOUT FURTHER INCIDENT. FOUND PITOT LINE LOOSE AND UNLOCKED. SECURED THE PITOT LINE, OPS CHECKED NORMAL IAW MM 34-12-00 AND 34-12-01. OPS CHECK OF BOTH ENGINES IAW MM 71-00-00, RUDDER RATIO IAW MM 27-21-00, AND AILERON LOCKOUT IAW MM 27-11-00, ALL OPSS TESTED OK. THE AIRCRAFT WAS GROUNDED.