As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DMI# 407496 MUSTY SMELL CAUSING WATERING EYES WITH APU RUNNING. ( AUXILIARY POWER UNIT (APU)(NOTE MANIFOLD ISOLATION VALVE MUST BE OPERATIONAL) ). GROUNDED - YES. INSPECTED APU COMPARTMENT AND COMPRESSOR. NO OIL BESIDES SLIGHT ON PLENUM. PERFORMED FIM 49-50 TASK 807. REPLACED BOTH LH & RH COALESCER BAGS AND CLEANED WATER SEPARATOR INLET LINE. OPERATED PACKS WITH APU. NO ODOR NOTED. PLACARD REMOVED. MIC SHEET UPDATED. OK FOR SERVICE.