As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMELL OF RAW FUEL COMING FROM ECS SYSTEM EN ROUTE WITH APU NOT OPERATING. SEEMS STRONGEST WITH LT PACK TEMP IS INCREASED. FUEL SMELL AFTER ENGINE START BUT ONLY LASTED FOR SECONDS. REMOVED AND REPLACED APU FUEL SHUTOFF SOLENOID VALVE IAW 49-31-05. OPS CHECK GOOD. NO SMELL NOTED. (M)