As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT LEFT DUCT PRESS CONTINUALLY PULSATES BETWEEN 20-35 PSI. N1 IS 68% STAB AT IDLE. NECESSARY TO LOCK HIGH STG SYSTEM CLOSED TO ISOLATE IF PROBLEM EXIST IN HIGH STG SYS OR PRSOV. LOCKED HIGH STG PER MEL AND ACCOMP HIGH POWER RUN AND NO FLUX NOTED AT ANY POWER SETTING WITH OR WITHOUT USERS. PACKS ON OR OFF. PNEU SYSTEM MARRIED AND STABLE. CHECKS GOOD.