As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON NR 2 ENGINE SHUTDOWN WHEN START LEVER WAS PLACED IN CUTOFF, THE NR 2 ENGINE RAN FOR 10-12 SEC. BEFORE SLOWLY ROLLING BACK TO OFF. THE NR 2 ENG VALVE CLOSED FUEL VALVE CONTINUED TO BE ILLUMINATED BRIGHT BLUE AND STAYED ILLUMINATED BRIGHT BLUE. GROUNDED - YES. REMOVED AND REPLACED ENGINE/APU FIRE DETECTION CONTROL MODULE, ALL TESTS EXCEPT TWO PASSED. THE NR 2 ENGINE STOPPED PROPERLY USING START LEVER AND NR 2 FIRE HANDLE. ALL MAINTENANCE TESTS COMPLETED PER AMM 26-00-01-400-801 AND AMM 26-21-730-801.