What was found
TURBINE CASE COOLING ACTUATOR STUCK OR REVERTED TO ITS FAIL-SAFE POSITION. TURBINE CASE COOLING LPT VALVE DEACTIVATED REF MEL 7524B; ROD END IS IN LOB. PERFORMED WIRING CHECKS PER FIM'S 75-24 TASK 805 & 806, ALL TESTED GOOD, REPLACED EEC PER MM, STILL FAULTS 75-40701 AND NOW 75-50701 AFTER ACTUATOR REPLACEMENT. REPLACED LT ENGINE TCC ACTUATOR MR75240 ON-69 OFF-12. OPS CHECK FAILED. DEACTIVATED REF MEL 7524B ROD END IS IN LOB. REPLACED LT ENGINE TCC AIR VALVE ACTUATOR PER MM. LUBED & RIGGED LPT CABLE. TEST PASSED ON ENGINE RUN. MESSAGE CLEARED, NO LEAKS NOTED.