What was found
DIVERSION - APPROACHING OUT CRUISE ALTITUDE OF 25000' WE HAD A "ENG L SYS FAIL AND ENG L FADEC ALTN" PERFORMED QRH LEFT ENG INDICATING HAD A X TALKED TO MTN AND DIVERTED TO THE NEAREST AIRPORT, WHERE AN UNEVENTFUL LANDING WAS MADE. REMOVED AND REPLACE NR 1 ENG FMU PER AMM 73-21-03-000-801 AND AMM 73-21-03-400-801 UP TO STEP 3.F(2), LEAK CHECK PENDING. OPS CHK PENDING. REMOVED AND REPLACED NR 1 EEC PER AMM 73-21-01-000-801 & 73-21-01-400-801. RETURN TO SERVICE OK. COMPLETED REMAINING STEPS FOR FMU LEAK AND OPS CHECK PER AMM 73-21-03-400-801. LEAK CHECK AND OPS GOOD.