As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APPROX 600' AFE CONTINOUS BELL SOUNDED,"SMOKE" LIGHT ON MWP ILLUMINATED. ACRID SMELL DETECTED BY ALL FLIGHT CREW CABIN SMOKE DETECTOR LIGHTS 4L AND 4R ILLUMINATED ON SECOND OFFICERS PANEL. DECLARED EMERGENCY AND RETURNED TO FIELD. FOUND NUMEROUS LEAKS AT RT PACK SECURED AND LEAK CK RT PACK PER 21-51-00 RON 26300.