Narrative:

At the end of the climb out; approaching leveloff FL190; I began to get erratic engine indications; spiking egt with fuel by-pass light; with no accompanying physical engine indications. No surging; vibrating or fluctuating noise or thrust. I attempted to control the spiking temperature and bypass light by reducing the power lever which was successful; but upon advancing the power lever the malfunction returned. Since the power lever had to be retarded to the point of flight idle to remove the malfunction resulting in occasional nts'ing 'negative torque sensing;' I decided a pre-planned engine shutdown was the best course of action. I believed that a single redline computer and/or a temperature limiter was the problem. The afm allows continued flight in both of these conditions. The decided course of action executed was a preplanned shutdown with an immediate set-up for an air start in case of a need for the engine. After the above procedures; I informed ATC that I was going to require a lower altitude as single engine performance would not hole FL190. I informed ATC I was not declaring an emergency that I just needed a lower altitude. The response was something to the effect of they were going to treat it as an emergency. After I was stabilized at altitude; I asked ATC to call dispatch and inform them of my situation. They confirmed dispatch had been notified. Approximately 1 hour out of ZZZ; I was able to reach dispatch and maintenance on unicom. I conferred with maintenance as to the situation and possible courses of action and the destinations. As I had over 3 hours of fuel; I made an ASR approach at ZZZ without seeing the field and proceeded to ZZZ2 and landed in VMC.

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Original NASA ASRS Text

Title: CAPTAIN OF SA22 DECIDES TO SHUT DOWN ENGINE WHICH IS DISPLAYING APPARENTLY FALSE INSTRUMENT ANOMALIES. CONTINUES TO DESTINATION AND THEN TO AN ALTERNATE WITH EXPECTATION OF RE-STARTING ENGINE SHOULD IT BECOME NECESSARY.

Narrative: AT THE END OF THE CLBOUT; APCHING LEVELOFF FL190; I BEGAN TO GET ERRATIC ENG INDICATIONS; SPIKING EGT WITH FUEL BY-PASS LIGHT; WITH NO ACCOMPANYING PHYSICAL ENG INDICATIONS. NO SURGING; VIBRATING OR FLUCTUATING NOISE OR THRUST. I ATTEMPTED TO CTL THE SPIKING TEMP AND BYPASS LIGHT BY REDUCING THE PWR LEVER WHICH WAS SUCCESSFUL; BUT UPON ADVANCING THE PWR LEVER THE MALFUNCTION RETURNED. SINCE THE PWR LEVER HAD TO BE RETARDED TO THE POINT OF FLT IDLE TO REMOVE THE MALFUNCTION RESULTING IN OCCASIONAL NTS'ING 'NEGATIVE TORQUE SENSING;' I DECIDED A PRE-PLANNED ENG SHUTDOWN WAS THE BEST COURSE OF ACTION. I BELIEVED THAT A SINGLE REDLINE COMPUTER AND/OR A TEMP LIMITER WAS THE PROB. THE AFM ALLOWS CONTINUED FLT IN BOTH OF THESE CONDITIONS. THE DECIDED COURSE OF ACTION EXECUTED WAS A PREPLANNED SHUTDOWN WITH AN IMMEDIATE SET-UP FOR AN AIR START IN CASE OF A NEED FOR THE ENG. AFTER THE ABOVE PROCS; I INFORMED ATC THAT I WAS GOING TO REQUIRE A LOWER ALT AS SINGLE ENG PERFORMANCE WOULD NOT HOLE FL190. I INFORMED ATC I WAS NOT DECLARING AN EMER THAT I JUST NEEDED A LOWER ALT. THE RESPONSE WAS SOMETHING TO THE EFFECT OF THEY WERE GOING TO TREAT IT AS AN EMER. AFTER I WAS STABILIZED AT ALT; I ASKED ATC TO CALL DISPATCH AND INFORM THEM OF MY SITUATION. THEY CONFIRMED DISPATCH HAD BEEN NOTIFIED. APPROX 1 HR OUT OF ZZZ; I WAS ABLE TO REACH DISPATCH AND MAINT ON UNICOM. I CONFERRED WITH MAINT AS TO THE SITUATION AND POSSIBLE COURSES OF ACTION AND THE DESTS. AS I HAD OVER 3 HRS OF FUEL; I MADE AN ASR APCH AT ZZZ WITHOUT SEEING THE FIELD AND PROCEEDED TO ZZZ2 AND LANDED IN VMC.

Data retrieved from NASA's ASRS site as of May 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.