As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DELTA P INDICATOR FOUND EXTENDED MAGNETIC CHIP DETECTOR REMOVED AND FOUND TO BE COVERED IN (SILVER COVERED) METAL PARTICLES. APU UNSERVICEABLE IAW AMM 49-91-81-200-801. PARA H ITEM 1. APU REPLACED WITH SERVICEABLE UNIT IAW TC 78349010.