As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT ENGINE HIGH PRESSURE TURBINE CASE COOLING ACTUATOR IS STUCK OR REVERTED TO ITS FAIL-SAFE POSITION. REPLACED TCC AIR VALVE ACTUATOR IAW AMM. PERFORMED TCC VALVE ACTUATOR TEST NR 3 & NR 6 IAW AMM 71-00-00. ACCOMPLISHED TCC SYS INSPECTION CHECK IAW AMM 75-24-00. GROUND CHECKED GOOD.