As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTS, POSSIBLE SMOKE OR MIST IN CABIN WHILE OPERATING RT PACK WITH APU. FOUND LEAKING HYDRAULIC LINE IN AFT ACCESSORY COMPARTMENT NEAR APU INTAKE. TIGHTENED LINE, CLEANED AIRBOX AND APU DOORS, RAN APU AND RT PACK AND NO SMOKE OR MIST PRESENT.