As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2887 - IAD - FLIGHT CREW REPORTED FUEL ODOR IN CABIN AND COCKPIT DURING TAXI AND PUSHBACK. IAD MX FOUND FITTING LOOSE ON LOW PRESSURE SWITCH. MX TIGHTENED FITTING AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE.