As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PUNGENT ODOR EMINATING FROM PACS SMELLS MUSTY IN CABIN AND COCKPIT WITH APU ON. REMOVED LT&RT COALESCER CLOTH WITH PACKING. INSTALLED NEW COALESCER CLOTHS WITH PACKINGS. OPS CHECK GOOD. WORK PERFORMED IN REFERENCE TO CE750 MM CHAPTER 12-10-01. FOR DETAILS REFER TO FAS WO 07-849.