What was found
FLT 146 PHX-LIH CREW STATES, CLIMBING FROM FL280 TO FL340, N3 BEGAN TO FLUCTUATE FROM 10% TO 93%, RIGHT DUCT PRESSURE FLUCTUATED FROM 0 TO 35, CABIN RATE FLUCTUATED BETWEEN 1000 UP AND 1000 DOWN, RIGHT CENTER FUEL PUMP PRESSURE LIGHT ILLUMINATED INTERMITTENTLY. ALL OTHER INDICATIONS NORMAL. MAINTENANCE REMOVED AND REPLACED N3 TACH GENERATOR, REMOVED AND REPLACED RT SPEED CARD.