What was found
ON FLIGHT 4479 THE CREW REPORTED THAT DURING CRUISE RECEIVED A HIGH INTERMEDIATE TURBINE TEMERATURE. THE CAPTAIN DECLARED AN EMERGENCY AND DIVERTED TO BOS. THE AIRCRAFT HAD A HIGH ITT EXCEEDANCE UPON LANDING. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE LEFT ENGINE INBOARD CUSTOMER BLEED AIR TUBE IAW RRMM CH 75-00-00-400-801. THE OPERATIONAL CHECK WAS GOOD AT THIS TIME. NO LEAKS NOTED. THE AIRCRAFT WAS RETURNED TO SERVICE.