As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN-FLIGHT SMOKE IN THE CABIN. NO DAMAGE TO THE AIRCRAFT. UNDER FLOOR INSULATION WAS FOUND BURNED BECAUSE OF CLOSE PROXIMITY TO AN ANTI-ICE DUCT. INSULATION REMOVED AND OPERATION CONTINUED. GULFSTREAM IS IN THE PROCESS OF EVALUATING AND WILL ISSUE A CUSTOMER BULLETIN WHICH WILL REQUIRE INSPECTION OF THE FLEET AND A CORRECTIVE ACTION.