As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) A COLLAPSED FILTER WAS FOUND DURING SCHEDULED REPLACEMENT OF THE AUXILIARY POWER UNIT OIL FILTER ELEMENT IAW TASK 000-49-360-714, 2000 HOURS INTERVAL. THE FILTER WAS REPLACED, LEAK CHECKED AND THE ACFT RELEASED FOR SERVICE. THE FILTER HAS NO TRACE OF CONTAMINATION, LIKELY THE RESULT OF AN INCORRECT INSTALLATION.