As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VIBRATION IN FLOOR BETWEEN ROWS 20-26 ON RT SIDE, ACCOMPANIED BY CHEMICAL ODOR. FLIGHT CREW SHUT DOWN RT PACK, NO VIBRATION & SMELL DISSIPATED. UNDER RT PACK FAN BYPASS CHECK VLV FLEXIBLE DUCT CLAMP LOOSE & BACKED OFF DUCT. RE SEATED DUCT & TIGHTENED CLAMP. RAN PACK WITH APU & ENG AIR. NO LEAKS, NO VIBRATIONS OR ODORS NOTED IAW MM21-00-00.