As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
2ND DIGIT FROM LEFT, #5 UNREADABLE ON FREQUENCY SELECTOR. REPLACED THUMBWHEEL ASSEMBLY. AFTER INSTALLATION OF THUMBWHEEL BY PREVIOUS TECHNICIAN, FOUND THUMBWHEEL TO BE INOPERATIVE. RESOLDERED SEVERAL COLD SOLDER JOINTS IN THUMBWHEEL ASSY. REPAIRED. BENCH CHECK GOOD.