As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURNED TO BLOCKS DUE PNEUMATIC LEAK, AFTER ENGINE START NR 8R CABIN SMOKE DETECTOR ILLUMINATED. UPON VISUAL INSPECTION HOT AIR WAS FOUND COMING THROUGH A HOLE IN THE AFT CABIN. FOUND LOOSE CLAMP AT AFT FUSELAGE DUCT COUPLING, RETORQUED CLAMP, OPS NORMAL, NO LEAKS NOTED AS PER M/M 20-20-00 PG 64-08.