As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOAM INSULATION ON UNDERSIDE OF INSTRUMENT PANEL GLARESHIELD DRIED OUT FROM AGE FLAKING POWDERY MATERIAL FALLING DOWN ON INSTRUMENTS. ENGINE INSTRUMENT CLUSTER NOT SEALED AND HAS BEEN CAUSING ENGINE INSTRUMENTS TO BECOME ERRATIC. HAD TO CHANGE FUEL QUANTITY GAUGES BECAUSE OF THIS PROBLEM. REMOVED INSULATION AND SEALED ENGINE INSTRUMENT CLUSTER.