Flight crew of an medium large transport declared an emergency and returned to land after smoke filled the cockpit. Caused by a pressurization pack going to the full hot position.

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Attributes
ACN	326138
Time
Date	199601
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ind
State Reference	IN
Altitude	agl bound lower : 0 agl bound upper : 1000
Environment
Flight Conditions	IMC
Light	Dawn
Aircraft 1
Controlling Facilities	tracon : ind tower : ind
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 275 flight time total : 20000 flight time type : 13000
ASRS Report	326138
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency other other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

On lift off from ind at XX40Z the left cabin pack which was in automatic 12 O'clock setting went to full hot causing the cabin to fill with smoke. The right pack also in 12 O'clock automatic position shut down. We shut off the left pack, declared an emergency, went to ram air which cleared out the smoke and made a normal landing.

Original NASA ASRS Text

Title: FLC OF AN MLG DECLARED AN EMER AND RETURNED TO LAND AFTER SMOKE FILLED THE COCKPIT. CAUSED BY A PRESSURIZATION PACK GOING TO THE FULL HOT POS.

Narrative: ON LIFT OFF FROM IND AT XX40Z THE L CABIN PACK WHICH WAS IN AUTO 12 O'CLOCK SETTING WENT TO FULL HOT CAUSING THE CABIN TO FILL WITH SMOKE. THE R PACK ALSO IN 12 O'CLOCK AUTO POS SHUT DOWN. WE SHUT OFF THE L PACK, DECLARED AN EMER, WENT TO RAM AIR WHICH CLRED OUT THE SMOKE AND MADE A NORMAL LNDG.

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.