Air carrier widebody transport smoke in cockpit during climb. Return land.

Attributes
ACN	122887
Time
Date	198909
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : pdx
State Reference	OR
Altitude	msl bound lower : 29000 msl bound upper : 29000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zse
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Route In Use	enroute airway : zse
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 180 flight time total : 17000
ASRS Report	122887
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency flight crew : overcame equipment problem other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

On climb out slight odor of smoke detected, began a plan in the event smoke confirmed (got out abnormal checklist, determined nearest airport). Smoke confirmed, so abnormal checklist was started. Smoke started getting very dense, so immediate turn to pdx and requested lower altitude. Started turn and descent while first officer completed checklist, which included bringing cabin up to 9500'. Warning horn began to sound. Looked at warning panel and all warning lights were on. Warning horn was cabin altitude warning, however cabin indicated only 9500'. Finally silenced warning horn (should have silenced horn sooner, but spent time trying to determine why it was sounding with cabin still at 9500'). Smoke began to clear away. While trying to determine cause of all warning lights, I realized all lights were on. Apparently when F/a wanted entry to cockpit, first officer pushed the light test button instead of cockpit door unlock switch, which are next to each other.

Original NASA ASRS Text

Title: ACR WDB SMOKE IN COCKPIT DURING CLIMB. RETURN LAND.

Narrative: ON CLBOUT SLIGHT ODOR OF SMOKE DETECTED, BEGAN A PLAN IN THE EVENT SMOKE CONFIRMED (GOT OUT ABNORMAL CHKLIST, DETERMINED NEAREST ARPT). SMOKE CONFIRMED, SO ABNORMAL CHKLIST WAS STARTED. SMOKE STARTED GETTING VERY DENSE, SO IMMEDIATE TURN TO PDX AND REQUESTED LOWER ALT. STARTED TURN AND DSCNT WHILE F/O COMPLETED CHKLIST, WHICH INCLUDED BRINGING CABIN UP TO 9500'. WARNING HORN BEGAN TO SOUND. LOOKED AT WARNING PANEL AND ALL WARNING LIGHTS WERE ON. WARNING HORN WAS CABIN ALT WARNING, HOWEVER CABIN INDICATED ONLY 9500'. FINALLY SILENCED WARNING HORN (SHOULD HAVE SILENCED HORN SOONER, BUT SPENT TIME TRYING TO DETERMINE WHY IT WAS SOUNDING WITH CABIN STILL AT 9500'). SMOKE BEGAN TO CLEAR AWAY. WHILE TRYING TO DETERMINE CAUSE OF ALL WARNING LIGHTS, I REALIZED ALL LIGHTS WERE ON. APPARENTLY WHEN F/A WANTED ENTRY TO COCKPIT, F/O PUSHED THE LIGHT TEST BUTTON INSTEAD OF COCKPIT DOOR UNLOCK SWITCH, WHICH ARE NEXT TO EACH OTHER.

Data retrieved from NASA's ASRS site as of August 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.