Air carrier widebody transport flight crew saw and smelled smoke in the cockpit at crs atl. After completing the smoke unknown source checklist they continued to destination.

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Attributes
ACN	155020
Time
Date	199008
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : vuz
State Reference	AL
Altitude	msl bound lower : 25000 msl bound upper : 31000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : ztl
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	enroute airway : ztl
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : atp pilot : flight engineer pilot : instrument
Experience	flight time last 90 days : 205 flight time total : 12900 flight time type : 2600
ASRS Report	155020
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

Heard a loud 'pop' noise on flight deck shortly followed by the smell of electrical smoke followed shortly by the sight of electrical smoke. Informed cabin crew, informed ATC of electrical problem. Performed 'electrical smoke/fire source unknown' checklist. Requested immediate descent to FL250. Smoke seemed to dissipate during the initial phase of checklist. Continued to iah with normal approach and landing. No emergency equipment required. Made all appropriate entries in maintenance logbook.

Original NASA ASRS Text

Title: ACR WDB FLT CREW SAW AND SMELLED SMOKE IN THE COCKPIT AT CRS ATL. AFTER COMPLETING THE SMOKE UNKNOWN SOURCE CHECKLIST THEY CONTINUED TO DESTINATION.

Narrative: HEARD A LOUD 'POP' NOISE ON FLT DECK SHORTLY FOLLOWED BY THE SMELL OF ELECTRICAL SMOKE FOLLOWED SHORTLY BY THE SIGHT OF ELECTRICAL SMOKE. INFORMED CABIN CREW, INFORMED ATC OF ELECTRICAL PROB. PERFORMED 'ELECTRICAL SMOKE/FIRE SOURCE UNKNOWN' CHKLIST. REQUESTED IMMEDIATE DSNT TO FL250. SMOKE SEEMED TO DISSIPATE DURING THE INITIAL PHASE OF CHKLIST. CONTINUED TO IAH WITH NORMAL APCH AND LNDG. NO EMER EQUIP REQUIRED. MADE ALL APPROPRIATE ENTRIES IN MAINT LOGBOOK.

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.