What was found
ON FLIGHT 3996 CREW REPORTED IN CRUISE ENGINE 2 ROLL BACK OCCURRED. AIRCRAFT RETURNED TO CHA. AIRCRAFT LANDED SAFELY. AIRCRAFT REMOVED FROM SERVICE. ISSUED MEL 78-1, PER FLIGHT DATA RECORDER, DATA READOUT TESTED ENGINE 2 THRUST REVERSER FADEC INTERFACE WIRING BETWEEN FADEC 2A AND 2B AND TR 2 STOW RELAYS AND ENGINE 2 RELAY RESISTOR MODULE FOR CONTINUITY INTERRUPTS WIRING MANUAL 78-31-55 AND 76-12-53 IAW SWPM 20-20-03. NO DEFECTS NOTED. ENGINE RUNS SATISFACTORY. MEL STILL OPEN. AIRCRAFT RETURNED TO SERVICE.