As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF ROLL, THE PROPELLER INDICATOR GAUGE EXCEEDED THE RED LINE AND FLUCTUATED. THE PILOT RETURNED THE AIRCRAFT TO PHX RAMP. NO EMERGENCY DECLARED. MAINTENANCE TROUBLESHOT AND FOUND DAMAGED WIRING AT THE NP TACH GENERATOR. MAINTENANCE REPAIRED THE DAMAGED WIRING. GROUND RUN AND OPS CHECKED GOOD.