What was found
(CAN) NR 1 ENGINE, THE LT START VALVEOPEN LIGHT CAME ON IN CLIMB. THE AIRCRAFT LEVELED OFF, WHEN THE POWER REDUCED, THE LIGHT WENT OUT. WHEN CLIMB POWER INITIATED AGAIN, THE LIGHT CAME BACK ON. THE AIRCRAFT CAME BACK TO PLACE OF DEPARTURE. THE AIRCRAFT WAS RELEASED UNDER MEL 80-1.2. THE STARTER VALVE (PN ON OFF, 392796-2-1, SN OFF 3938, SN ON 3624) WAS LATER REPLACED IAW AMM 80-10-02. OPERATIONAL CHECK C/OUT PER AMM 71-00-00.