As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUEL SMELL UPON START UP OF APU ON GROUND BEFORE BLEEDS ARE TRANSFERRED. COMPLIED WITH (CM) ACTION PLACARDED AND PLACED ON MEL. TROUBLESHOT APU FUEL SYSTEM RAN APU AND ACM NO FUEL ODOR DETECTED. NO LEAKS DETECTED. RETURN TO SERVICE. REMOVED OFF MEL. (K)