As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX- LEFT HAND VERTICAL BEAM BETWEEN REAR PRESSURE BULKHEAD AND FRAME 18075 IS CHAFED JUST AFT OF FORWARD APU ENCLOSURE. VERTICAL LEG OF REPAIR ANGLE WHERE SEVERAL HI-LOKS ARE INSTALLED DO NOT HAVE THICKNESS CALLED OUT FOR IN EA 4-53-131 STEP 2. REPAIRED IAW HORIZON AIR EA 4-53-1324.