What was found
AIRCRAFT WAS GROUNDED: DURING TAKEOFF ROLL #1 FLIGHT ATTENDANT HEARD A POP ON THE DOOR AREA. UPON LANDING GATE AGENT REPORT THE OUTSIDE DOOR HANDLE COMPLETE OPEN ON THE MAIN ENTRY DOOR BUT INDICATION INSIDE THE FLIGHT DECK WAS NORMAL. MAINTENANCE FOUND SPRING ON L1 DOOR HANDLE SHAFT DAMAGED AND REPLACED THE DOOR HANDLE SHAFT ASSEMBLY ON THE L1 DOOR PER AMM 52-11-11. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLIUSHED WITH NO ISSUES REPORTED.