As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT, WITH LEFT PACK ON MEL, LEFT PACK LIGHT ILLUMINATED. TRIP RESET HAD NO EFFECT. SELECTED PACK OFF AND LEFT BLEED OFF. LIGHT WENT OUT APPROX 7-10 MINUTES LATER. EQUIPMENT COOLING EXHAUST ALSO ILLUMINATED AND DID NOT GO OUT AFTER SELECTING ALTERNATE. ACFT GROUNDED. ACCOMPLISHED EQUIPMENT COOLING EXHAUST FAN OPERATIONAL TEST. TEST PASSED IAW AMM 21-27-00-700-802.