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SMOKE OR FUMES - E26.01

Check your ATR QRH for Smoke Source Detetection additional guidance.

ELEC SMK Warning first: probably ELEC SMK.
- If you get the ELEC SMK Warning first, and then notice the smoke: it is probably caused by an electrical issue.
- Equipment failure, including a failure that trips a CB, may be the source.
- You may notice a burning equipment smell before the ELEC SMK warning activates.
Smoke seen first: probably AIR COND SMOKE.
- If you notice smoke first (coming out of ventilation outlets), and then you get the ELEC SMK warning, it is probably not from an electrical issue.
- An engine failure or abnormal engine parameters may cause smoke or fumes via the bleed air system; consider air conditioning smoke.
- Smoke in the cockpit from any source can trigger the electric compartment smoke detector when the smoke passes through the electric compartment.
Recirculation fans can move smoke and fumes through the pressurised areas and this may trigger several smoke warnings.

Uncontrolled! - Check your up to date ATR and company documentation!