As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS ON DESCENT WITH THROTTLES AT 1.2 TO 1.3 EPR, RECEIVED A PRESSURATION FLOW LIGHT, OUTFLOW VALVE WAS FULLY CLOSED. MAINTENANCE FOUND LT ACM TURBINE LOCKED UP. REMOVED AND REPLACED LT ACM IAW AMM 21-51-01.