As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING SCHEDULED INSP, THE LT INBD EXHAUST DUCT THAT CONNECTS THE LT ENG COWLING`S INTAKE HEATED LIP TO THE EXHAUST PORT OF THE LT ENGINE`S INBD EXHAUST STACK WAS FOUND TO BE BROKEN AND DETACHED FROM ITS MATING FLANGE. THIS, IN TURN, WAS ALLOWING EXHAUST GASES TO FILL THE LT ENGINE`S COWLING. THE DUCT WAS R & R WITH A NEW PART.