As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT UPON APU START AND ACTIVATION OF PACK 1, A STRONG FUEL ODOR ENTERED THE COCKPIT. THE PACK SYSTEM WAS DEFERRED. THE DEFERRAL WAS CLEARED ON 4/15/2012 BY REPLACING THE APU FUEL CONTROL. OPERATIONAL CHECKS WERE GOOD WITH NO FURTHER DEFECTS NOTED.