As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAX INFLIGHT T161/21MAY - ON SHORT FINAL WITH AUTO THROTTLES OFF BOTH ENGINES WERE AT 40 PERCENT N1 THEN RIGHT ENGINE WENT BACK TO 32 PERCENT N1. LANDED LAX WITHOUT INCIDENT. REPLACED THE M644 ELECTRONIC ENGINE CONTROL CARD. SYSTEM GROUND CHECKED NORMAL OPERATION.