As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT, MASTER CAUTION LIGHT, OVERHEAT DETECTOR, SIX PACK AND APU DETECTOR INOPERATIVE LIGHTS ILLUMINATED INTERMITTENTLY THREE DIFFERENT TIMES OVER 20 MINUTES. APU WAS NOT STARTED. ACCOMPLISHED APU FIRE DETECTION OPS TEST, TESTED GOOD IAW AMM 26-15-00.