As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING AMD SHORTLY AFTER ENGINE START, SMELLED STRONG ODOR OF SULFER. LASTED SEVERAL MINUTES. ENTIRE AIRCRAFT HAD THIS SMELL/ODOR. STARTED ENGINES TWICE OVER 3-4 HOUR PERIOD. SMELL OCUURED BOTH TIMES. FORWARDED REPORT TO SMOKE AND FUMES FOCUS GROUP. C/ OUT SMOKE OR FUMES IN CABIN CONDITIONAL INSPECTION NO DEVIATION FROM NORMAL OPERATING. PROCEDURE OCCURRED