As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 6341 - IAD-LGA - DURING TAXI, RETURNED TO GATE DUE TO THE LEFT ENGINE CONDITION LEVER WILL NOT COME OUT OF TAXI POSITION. AIRCRAFT RETURNED TO GATE WITH NO FURTHER INCIDENTS. MAINTENANCE FOUND CONDITION LEVER ROD END BOLT MISSING AT FUEL CONTROL CONNECTION. REPLACED BOLT AND AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)