AN ACR SA227 ABORTED TKOF AT WMH AFTER EXPERIENCING AN APPARENT ROLLBACK OF PWR IN THE #2 ENG.

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THIS FLT TOOK PLACE FROM WMH TO STL. AN IFR CLRNC WAS OBTAINED ON THE GND VIA LANDLINE FROM JONESBORO RADIO. VOID TIME WAS AMPLE -- AT LEAST 15 MINS. UPON COMPLETING ALL REQUIRED TASKS AND CHKLISTS; PROCEEDED TO DEPART WMH RWY 23. AS TKOF PWR WAS INITIALLY APPLIED; ALL SYS INDICATED NORMAL. PROPER TKOF PWR WAS SET AND CLOSELY MONITORED. AS THE TKOF ROLL PROCEEDED; ADJUSTMENTS WERE MADE AS NECESSARY DUE TO RAM EFFECTS. HOWEVER; DESPITE HOW ACCURATELY THE PWR SETTINGS WERE ADJUSTED; THE BYPASS SYS ACTIVATED PREMATURELY ON ENG #2 DURING THE TKOF ROLL. APCHING BOKIAS; THE BYPASS SYS ON ENG #2 ACTIVATED AT INTERVALS OF 1-3 SECONDS. TKOF WAS ABORTED ON RWY 23. A TAXI BACK AND PWR CHK WERE CONDUCTED. FROM ANALYZING INDICATIONS ENCOUNTERED DURING DEPS AT DFW; HOT AND HRO; I FELT IT WAS SAFE TO CONTINUE FLTS A AND B WITH THE PREVIOUS INDICATIONS IN MIND. SUBSEQUENTLY; FOR THE REMAINING FLTS; THERE WERE NO ABNORMAL INDICATIONS. MAINT; AND SUBSEQUENT CREWS WERE ADVISED. NOTHING FOLLOWS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATES THAT THIS ACR BOUGHT SEVERAL ACFT FROM A DEFUNCT CARRIER. THIS PARTICULAR ACFT WAS ONE OF THOSE RECENTLY ACQUIRED. RPTR FURTHER STATES THAT IN THE PROCESS OF INTEGRATING THESE ACFT INTO THE NEW CARRIER FLEET; NUMEROUS ACFT WERE RPTED TO HAVE OVERLY SENSITIVE SINGLE REDLINE COMPUTERS. THESE COMPUTERS FUNCTION TO LIMIT ITT OVERTEMP BY LIMITING FUEL THROUGH THE FUEL CTL UNIT SIMILAR TO A FUEL TOPPING GOVERNOR. RPTR STATES THIS HIS COMPANY IS AWARE OF AND CORRECTING THE DISCREPANCY TO THE SINGLE REDLINE COMPUTERS AND BRINGING THESE ACFT UP TO THE SAME MAINT STANDARD AS THE REST OF THEIR FLEET.