What was found
IAH - FLT 2697 - DURING CLIMB, PILOT REPORTED LT GEAR DID NOT RETRACT WHEN GEAR WAS SELECTED TO THE 'UP' POSITION. THE AIRCRAFT RETURNED TO THE FIELD WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED LT MLG SEQUENCE VALVE. THE OPERATIONAL CHECK OF THE GEAR PROVED SATISFACTORY, AND THE AIRCRAFT WAS RETURNED TO SERVICE. (X)