As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND FIRE EXTINGUISHER WEDGED IN THE RIGHT INBOARD LANDING GEAR TRUCK BETWEEN THE NR 9 AND 10 MAIN LANDING TIRES. THIS CAUSED THE EICAS WARNING CONFIG STAB ON TAKE OFF. THE FIRE EXTINGUISHER RUBBED THE INBOARD SIDE LINER OF EACH NR 9 AND 10 MLG TIRES. REMOVED THE FIRE EXTINGUISHER. PERFORMED CONDITIONAL INSPECTIONS IAW AMM 05-51-58, AND 05-51-25. REMOVED AND REPLACED BOTH MLG WHEEL ASSEMBLIES. ACFT RETURNED TO SERVICE.