As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE LT ENGINE N2 STARTED TO DECREASE UNTIL REACHING 36 PERCENT (OSCILLATING BETWEEN 32 AND 40 PERCENT), THERE IS MORE THAN ONE KNOB SPLIT BETWEEN ENGINES TO KEEP SAME EPR. FLIGHT DIVERTED TO PTY. MOISTURE TRAP WAS CHECK FOR CONDITION AND BURNER PRESSURE. LT ENGINE INLET/OUTLET AND PT2 LINE WERE CHECK. EPR TRANSMITTER WAS SWAPPED. LT ENGINE TACHOMETER B-ELECTRICAL LINE WAS FOUND DISCONNECTED. REPAIRED IAW AMM 77-12-00 P 201. RUN UP TEST OK.