As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEN INFLIGHT T225/13JUN BOS TO SAN. CREW REPORTED ENGINE PRESSURE RATIO INDICATION FOR NR ONE ENGINE. LANDED DEN WITHOUT INCIDENT. SECURED B-NUT ON P1 LINE FORWARD OF NR ONE ENGINE FUEL FLOW GOVERNOR. SYSTEM GROUND CHECKED NORMAL OPERATION. (A)