An MD11 in cruise diverted due to smoke in the cockpit.

Attributes
ACN	374890
Time
Date	199707
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : boi
State Reference	ID
Altitude	msl bound lower : 35000 msl bound upper : 35000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : smx
Operator	common carrier : air carrier
Make Model Name	DC-10 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other other other
Route In Use	enroute airway : zlc
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 19000 flight time type : 4000
ASRS Report	374890
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 10000 flight time type : 400
ASRS Report	374889
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa other other : unspecified cockpit
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

On climb from atl, aircraft had small amount of smoke come into cockpit. It dissipated rapidly. No smoke in cabin. It was a repeat gripe on the aircraft from 2 days earlier. 3 hours later in cruise smoke came into cockpit via air conditioning vents. Smoke also reported in passenger cabin. Diverted to nearest suitable airport (boi). Callback conversation with reporter revealed the following information: the reporter states the aircraft was an MD11. The source of the smoke was the #3 bleed system. The aircraft was maintenance ferried to atl where it was determined that oil was leaking past a bearing seal in the compressor section and contaminating the bleed air. Correction involved replacing the #3 engine.

Original NASA ASRS Text

Title: AN MD11 IN CRUISE DIVERTED DUE TO SMOKE IN THE COCKPIT.

Narrative: ON CLB FROM ATL, ACFT HAD SMALL AMOUNT OF SMOKE COME INTO COCKPIT. IT DISSIPATED RAPIDLY. NO SMOKE IN CABIN. IT WAS A REPEAT GRIPE ON THE ACFT FROM 2 DAYS EARLIER. 3 HRS LATER IN CRUISE SMOKE CAME INTO COCKPIT VIA AIR CONDITIONING VENTS. SMOKE ALSO RPTED IN PAX CABIN. DIVERTED TO NEAREST SUITABLE ARPT (BOI). CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATES THE ACFT WAS AN MD11. THE SOURCE OF THE SMOKE WAS THE #3 BLEED SYS. THE ACFT WAS MAINT FERRIED TO ATL WHERE IT WAS DETERMINED THAT OIL WAS LEAKING PAST A BEARING SEAL IN THE COMPRESSOR SECTION AND CONTAMINATING THE BLEED AIR. CORRECTION INVOLVED REPLACING THE #3 ENG.

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.