What was found
IAH - FLIGHT 2760 THE CREW REPORTED THE CAPTAINS SIDE ATT AND HDG FLAG WITH THE F/O SIDE ATT FLAG, ATT INDICATOR TUMBLED, HEADING INDICATOR TUMBLED AND ROLLED, AND THE SPEED TAPE AND ALT TAPE WENT BLANK. THE AIRCRAFT RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE NUMBER TWO AHRS COMPUTER, OPERATIONALLY TESTED WITH NO DEFECTS, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.