What was found
(CAN) THERE HAVE BEEN INCIDENTS OF T1 SENSOR HOUSING FRACTURE AND LIBERATION IN OPERATION RESULTING IN SECONDARY IMPACT DAMAGE TO THE ENGINE FAN BLADES AND BY-PASS DUCTING. EVENTS TO DATE HAVE RESULTED IN NO OPERATIONAL EFFECTS. THE POTENTIAL EXISTS FOR SECONDARY DAMAGE TO THE T1 ELEMENT AND RESULTING ERRONEOUS ITT INDICATION. INVESTIGATION IS IN PROGRESS TO IDENTIFY ROOT CAUSE AND DEFINE APPROPRIATE MITIGATION FOR ENGINES IN SERVICE.