What was found
DURING STARTUP, THE ACFT WAS BROUGHT TO IDLE IN PREPARATION FOR DEPARTURE. THE MEDICAL CREW SAW SMOKE EXITING THE EXHAUST. THE PILOT TURNED TO LOOK AT THE AFT END OF ACFT & LOOKED BACK AT GAUGES TO NOTICE THAT THE ENG INSTRUMENTS HAD AGREED WITH HIS VISUAL CONFIRMATION OF AN ENG SHUTDOWN. REMOVED, CLEANED, INSPECTED & REINSTALLED FUEL NOZZLES IAW TECHNICAL REPRESENTATIVE & PERFORMED FUEL BOOST PUMP OPERATION GND RUN FOR FUEL SYS AIR INTAKE ISSUES & FOUND NO DISCREPANCIES NOTED. ACFT FOUND TO BE IN AN AIRWORTHY CONDITION & RETURNED TO SERVICE.