What was found
FIGHT CREW REPORTED THAT ON LIFT OFF, PILOT RECEIVED A STICK SHAKER AND RED AIRSPEED TAPE STALL INDICATION THAT LASTED 2-3 MINUTES. LEVELED OFF AT 2,500 - 3,000 FT AND DECLARED AN EMERGENCY. RETURNED AND LANDED UNEVENTFULLY. FUTHER INVESTIGATION FOUND THE NR 1 ADC CONNECTOR WAS NOT FULLY ENGAGED AND LOCKED. ENGINE FADECS DOWNLOADED AND CIRCUIT BREAKERS RESET TO RETREAVE TROUBLSHOOTING DATA. CONNECTOR WAS SECURED AND ADC RE-RACKED. SYS OPS CHECKS WERE PERFORMED AND ENGINE RUNS WERE PERFORMED WITH NO FURTHER FAULTS FOUND. A SUCCESSFUL FLIGHT WAS PERFORMED. THE ACFT WAS RETURNED TO SERVICE WITH NO FURTHER ISSUES.