What was found
AFTER TAKEOFF, THE CREW RECEIVED A NR 2 FUEL CONTROL FAULT. DEFERRING TO THE QRH, WHICH TOLD THEM TO PULL ENG BACK TO IDLE. PROCEDURE WAS FOLLOWED, BUT THE SAME ISSUE WAS ACTIVE. THE FLIGHT WAS DIVERTED, AN EMERGNECY WAS DECLARED. RECEIVED AN NR 2 ENG ADEC MSGE. TAXIED TO THE GATE. MX REPLACED THE NR 2 ENGINE FMU IAW AMM 73-22-52. ACCOMPLISHED AN OPERATIONAL & LEAK CHECK WITH NO DEFECTS NOTED. .