As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE WEDGE (LENS) PN 65C187-001 OF THE AIRSPEED INDICATOR BEZEL ASSEMBLY (PN 1U2202-007) HAS CRACKED. THIS CAUSES A STATIC SIDE LEAK OF THE INSTRUMENT. APPEARS THE LIGHT ASSEMBLY THAT PROVIDES THE BACK LIGHTING IS BECOMING TOO HOT AND CRACKING, THE POLY-CARBONATE MATERIAL THAT THE WEDGE IS MADE FROM. AIRSPEED INDICATOR IS APPROX 4 YEARS OLD WITH 151.0 TOTAL HOURS (TACH TIME).