Dash 8-300
Flight Crew Air Transport Pilot (ATP)
Distraction; Situational Awareness; Time Pressure; Training / Qualification
Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Flight Crew FLC complied w / Automation / Advisory; Flight Crew Returned To Gate; General Declared Emergency
Aircraft
As we taxied out from Bravo short of Kilo; we smelled something that smelled like burnt rubber and that was followed by smoke in the flight deck. The First Officer declared an emergency to Ground Control and we stopped the aircraft on Taxiway Bravo. We ran the Aircraft Fire or Smoke Checklist and then followed that down to the suspected source of bleed or air conditioning. Smoke began to subside a little when the bleeds were shut off. We shut down the engines and had fire rescue check the airplane for smoke or fire outside of the aircraft. They determined no signs of smoke or fire so we restarted the airplane; kept bleeds off and were followed back to the gate. On the way back; the smell worsened and stayed in the aircraft once we shutdown but the smoke never returned.
A DHC8-300 developed a burnt rubber smell with smoke during taxi out so an emergency was declared; the engines shut down; and after Airfield Rescue and Fire Fighter inspections the aircraft restarted for a return to the gate.