What was found
AFTER GEAR RETRACTION CAPTAIN RED SPEED TAPE APPEARED RENDERING SPEED INFO INOP. SWITCHED ADC INSTRUMENT TO SYS, TWO SPEED INFO RECOVERED. NR 1 AND 2 AUTO THROTTLE TRIPPED, NR 2 ONLY RESET, BOTH LOWER ACCESS DOOR SHOW AMBER WITH CHIME. CABIN RATE OF CLIMB ABOUT THE SAME AS A/C RATE OF CLIMB, ECAM DOOR PAGE SHOWS GREEN PRIOR TO BLOCKOUT ELECTED TO RETURN TO IAH. REMOVED AND REPLACED NR 1 ADC AND C/W PITOT STASTIC CHECKS NORMAL, RED SPEED LIMIT LIGHT OK. FOUND ACCESS DOOR HANDLE TRIPPED, RESET OK.