What was found
AT FL360, IN SMOOTH AIR, FOR ABOUT 15 MINS, BOTH ENG HAD FLUCTUATING PARAMETERS. LEFT ENG EPR RAPIDLY CHANGED FM LESS THAN 1.0 TO 1.45, N1 +--4%, EGT +-- 6, FF +--.4. CHECKED LEFT PIMU EEC CH A REVERSER RNG FAIL DISPLACED CHECKED ASSOCIATED WIRING PLUGS AND SWITCHES REF MM TO BOTH REVERSER LOCKING ACTUATORS NO FAULTS NOTED.ACCOMPLISHED ENG RUN TO 1.4 EPR PER JRH NO ABNORMAL INDICATIONS NOTED. EPR N1 EGT N2 FF ALL NORMAL.