As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT NOT GROUNDED: PILOT REPORTS DURING DESCENT AT 8000 FT AND IAS 240 KTS, CABIN ALTITUDE / TAKEOFF CONFIG HORN SOUNDED FOR 3-5 SEC. THEN STOPPED. NO LIGHTS OR ABNORMALITIES NOTED. CABIN ALT AND CONFIGURATION NORMAL. ACCOMPLISHED TAKEOFF WARNING SYSTEM FIM 31-51-00-810-803. NO FAULTS FOUND.