As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PASSING FL 240 NR 1 MAIN CARGO SMOKE LIGHT ILLUMINATE WITH ASSOCIATED AURAL WARNING. EMERGENCY DESCENT, PASSING 12,000 FT CABIN ALTITUDE THE LIGHT EXTINGUISHED. NEVER ANY INDICATION OF SMOKE OR FUMES. MEM BLEW OUT SENSE LINES AND REMOVED AND REPLACED DETECTOR UNIT FOR NR 1 MAIN CARGO SMOKE. SYSTEM TESTS GOOD AT THIS TIME. REF 727-200AMM/26-16-001-4 AND 26-16-001-5. R/I FROM FACT PREMATURE REMOVAL/INSTALLATION OFF MFG 7740-01.