As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE INDUCTION DUCT SUPPORT BRACKET P/N 15671-002 HAS BEEN FOUND TO BE CHAFING INTO THE ALTERNATE AIR DOOR PIVOT BOLT P/N AN3-34. REPORTED THIS CONDITION BEFORE. A CHECK OF MULTIPLE AIRCRAFT HAVE SHOWED SIGNS OF CHAFFING AT THIS LOCATION. SUGGEST CLOSE LOOK AT THIS AREA WHEN PERFORMING MAINTENANCE. IT IS NECESSARY TO REMOVE THE DUCT ASSY P/N 15708-001 TO PERFORM THIS INSPECTION.