An ATR-42 flight crew shut down the aircraft and evacuated on the ramp when smoke entered the cockpit and the ELEC SMK warning illuminated on the CAP.
Synopsis
An ATR-42 flight crew shut down the aircraft and evacuated on the ramp when smoke entered the cockpit and the ELEC SMK warning illuminated on the CAP.
Narrative
After landing we were instructed by tower to exit the runway by taking a right to proceed to the ramp. As we entered the ramp we both smelled smoke and within seconds received a master warning with an ELEC SMK annunciation on the CAP (Crew Alerting Panel). I noticed smoke beginning to fill the cockpit; obscuring the instrument panel by approximately 30 percent. We agreed we needed to evacuate the aircraft immediately. I notified ramp tower that we had smoke in the cockpit and that we needed to evacuate. He acknowledged and advised he would send CFR. The Captain set the parking brake and shut down both engines. He instructed me to exit the aircraft as he pulled the CVR circuit breaker and turned off the battery. When I was up I peered through the cockpit door window and did not see any fire or smoke. I opened the cockpit door and I noticed the air was 'clearer' in the cargo compartment. I then opened the forward cargo door and exited the aircraft. The Captain followed and we both walked away from the aircraft and waited for CFR.
Second reporter narrative
...I stopped the aircraft; brought the condition levers from Max RPM to Fuel Shut Off and waited until the propellers stopped to initiate the evacuation.Prior to releasing my seatbelt I turned off the battery switch on the overhead panel. This action seemed to immediately stop the smoke from increasing in intensity. I then exited the aircraft with my first officer and contacted emergency crew and advised them of any HAZMAT on board the aircraft. At the time of the event; due to the immediate requirement for evacuation and the potential toxicity of the smoke encountered; I believed that calling for a written evacuation checklist would have unnecessarily delayed the flight crew and exposed them to greater danger of smoke inhalation; so no QRH checklist was completed. I'd recommend that any crew faced with the same exact circumstances do the same thing; shut the aircraft down and get out.
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Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.