As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TURB CASE COOL HPT R RIGHT ENGINE HIGH PRESSURE TURBINE (HPT) CASE COOLING ACTUATOR IS STUCK OR REVERTED TO ITS FAIL-SAFE POSITION. 2 ENG 777035 REPLACE TCC ACTUATOR. TURBINE CASE CLG AIR VLV ACTR (R ENG) HPT POSITION FEEDBACK IS OUT OF RANGE'. TCC OPERATES OK BUT THIS LOWER LEVEL MSG CAN SET FALSE FDE 'TURB CASE COOL HPT'. REPLACED TCC AV ACTUATOR, REF MM 75-24-05.