As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL240 RIGHT TQ AND RIGHT PROP RPM GAUGES AT ZERO. UNABLE TO MAINTAIN AIRSPEED. RIGHT ENGINE BECAME ROUGH, FUEL FLOW DECREASED. GAUGES THEN RETURNED TO NORMAL WITH HIGH RIGHT ITT. TURNED R HP OFF, ENGINE STABILIZED. MAINTENANCE INSPECTED BLEED SYSTEM AND FOUND A LOOSE CLAMP ON THE LOW PRESSURE VALVE. SECURED CLAMP AND PERFORMED SYSTEM OPERATIONAL CHECKS WITH NO FURTHER DEFECTS NOTED.