As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: DURING DECENT AT ALTITUDE 16000 FEET ON DECENT CABIN ALTITUDE WARNING LIGHT AND HORN SOUNDED. AIRCRAFT EMERGENCY LANDED SAFELY AT ABQ. FOUND BLOWN DUCK IN THE RIGHT PACK. REMOVED AND REPLACED BLOWN DUCT FROM ACM. ENGINE RUN AND LEAK CHECK NO LEAK FOUND. PER AMM 21-51-04.