What was found
LEFT ENGINE WOULD NOT SHUTDOWN WHEN FUEL CUTOFF MOVED TO CUTOFF. IT RAN FOR APPROXIMATELY 25 SECONDS BEFORE SHUTTING DOWN. REMOVED L/H ENGINE FUEL FLOW GOVERNOR AS PER AMM 73-21-01-4-4. INSTALLED LEFT ENG FFG IAW AMM 73-21-01-4-4. PERFORMED ENG LEAK CHECK TEST 1 AND IDLE CHECK. LEAK CHECKED OK. ALL PARAMETERS WITIHIN THE LIMIT. REMAIN HIGH POWER TEST 9, 10 AND 11. RAN ENG NR 1 AND 2 IAW JRH, AND PERFORMED TESTS 9, 10, AND 11 IAW MM 71-00-00-5-3-R , ALL PARAMETERS NORMAL , ACFT OK FOR SERVICE.