As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACID BURNING ODOR ON FLIGHT DECK AND CABIN ON TAXI IN, NO VISIBLE SMOKE. FOUND INSULATION SUCKED INTO BOTH COOLING FANS. REPAIRED INSULATION IAW EMB AMM 25-81-01. PERFORMED GROUND ENGINE RUNS WITH NO DEFECTS NOTED. AIRCRAFT RETURNED TO SERVICE.