The National Transportation Safety Board is urging the FAA to issue an emergency airworthiness directive requiring operators of certain Piper Aircraft PA-31T, PA-31T1, PA-31T2, PA-31T3, and PA-31P-350 Navajos to address a wiring condition at the floor-mounted circuit breaker panel that could lead to chafing, thermal stress, or arcing directly below the panel.
Source: aopaNTSB: PA-31 wire-chafing risk warrants emergency AD