As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENGINE HIGH PRESSURE TURBINE CASE COOLING ACTUATOR IS STUCK OR REVERTED TO ITS FAIL/SAFE POSITION. REPLACED NR 1 ENGINE TCC ACTUATOR. RECONNECTED AND RIGGED TCC CONTROL. REPINNED CONNECTOR DM75004 TO NORMAL POSITION. PASSED GROUND TEST 15 AND 3.