As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PRE-INSPECTION RUN-UP, TECH FOUND OIL TEMPERATURE AND OIL PRESSURE NEEDLES (DUAL GAUGE) INTERMITTENTLY PEG FULL SCALE. REMOVED GAUGE AND FOUND SMALL PIECES/PARTS RATTLING AROUND INSIDE UNIT. ALSO, GAUGE CORE MOVES FORE AND AFT (REAR SCREWS MISSING). SENT OUT FOR REPAIR.