A commuter turboprop has to divert due to smoke in the cockpit when 25 mi east of lfk, tx.

Attributes
ACN	525575
Time
Date	200109
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : lfk.airport
State Reference	TX
Altitude	msl single value : 19000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Light Transport
Operating Under FAR Part	Part 121
Flight Phase	cruise : level ground : parked
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : atp
Experience	flight time last 90 days : 200 flight time total : 2560 flight time type : 1100
ASRS Report	525575
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical other anomaly other anomaly
Independent Detector	other flight crewa other flight crewb
Resolutory Action	controller : provided flight assist flight crew : landed in emergency condition flight crew : diverted to another airport flight crew : declared emergency
Consequence	other other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

In cruise, first officer and I smelled smoke in cockpit. Within several seconds it became very strong and visible smoke was observed. I commanded oxygen masks on and emergency action items of QRH. We declared an emergency and requested vectors to nearest suitable field, lfk. We landed without incidence at lfk. A fire truck was there to meet us and inspected the aircraft. No evidence of flames was detected. Our company maintenance determined the cause to be the #2 acm (air cycle machine). No juries to the 6 passenger.

Original NASA ASRS Text

Title: A COMMUTER TURBOPROP HAS TO DIVERT DUE TO SMOKE IN THE COCKPIT WHEN 25 MI E OF LFK, TX.

Narrative: IN CRUISE, FO AND I SMELLED SMOKE IN COCKPIT. WITHIN SEVERAL SECONDS IT BECAME VERY STRONG AND VISIBLE SMOKE WAS OBSERVED. I COMMANDED OXYGEN MASKS ON AND EMER ACTION ITEMS OF QRH. WE DECLARED AN EMER AND REQUESTED VECTORS TO NEAREST SUITABLE FIELD, LFK. WE LANDED WITHOUT INCIDENCE AT LFK. A FIRE TRUCK WAS THERE TO MEET US AND INSPECTED THE ACFT. NO EVIDENCE OF FLAMES WAS DETECTED. OUR COMPANY MAINT DETERMINED THE CAUSE TO BE THE #2 ACM (AIR CYCLE MACHINE). NO JURIES TO THE 6 PAX.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.