Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Flight Crew Landed in Emergency Condition
Aircraft
Smoke and Fumes in cockpit. We suspect a malfunction occurred in flight with left ACM (Air Cycle Machine). This created the smoke and fumes in cockpit.
[Report narrative contained no additional information.]
B757-200 flight crew reported they landed in emergency condition because of smoke and fumes in the cockpit that were later traced to suspected Air Cycle Machine failure.