As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT ENG HPSOV ON DURING DESCENT. PERFORMED PNEUMATIC HEALTH CHECK PER MM. FOUND PRESS REGULATING VALVE LEAKING AT ELBOW AND CONTROL PRESS LINE, REPLACED LINE & ELBOW PER MM. REMOVED AND REPLACED HIGH PRESS CONTROLLER PER MM. OP'S CHECK GOOD.