<< >> NASA ASRS Report 625798, July 2004

B757 flight crew experience smoke and burning smell at cruise. Declare emergency and land at ZZZ. Cause found to be failed air conditioning recirculation fan.

Attributes
ACN	625798
Time
Date	200407
Day	Mon
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 37000
Environment
Light	Night
Aircraft 1
Controlling Facilities	artcc : zzz.artcc
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	625798
Person 2
Function	other personnel other
Events
Anomaly	aircraft equipment problem : critical other anomaly
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency flight crew : landed in emergency condition flight crew : diverted to another airport
Consequence	other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Burning smell and small amount of smoke occurred during cruise phase of flight. Declared an emergency with ATC and requested direct to ZZZ1. Accomplished smoke removal checklist and made an overweight landing at ZZZ1. Emergency equipment inspected exterior of plane after landing and found no evidence of fire. Smoke and smell had dissipated inside the plane so we proceeded to the gate followed by emergency equipment. Maintenance told us that a recirculation fan had failed and had caused the problem.

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Original NASA ASRS Text

Title: B757 FLT CREW EXPERIENCE SMOKE AND BURNING SMELL AT CRUISE. DECLARE EMER AND LAND AT ZZZ. CAUSE FOUND TO BE FAILED AIR CONDITIONING RECIRCULATION FAN.

Narrative: BURNING SMELL AND SMALL AMOUNT OF SMOKE OCCURRED DURING CRUISE PHASE OF FLT. DECLARED AN EMER WITH ATC AND REQUESTED DIRECT TO ZZZ1. ACCOMPLISHED SMOKE REMOVAL CHKLIST AND MADE AN OVERWT LNDG AT ZZZ1. EMER EQUIP INSPECTED EXTERIOR OF PLANE AFTER LNDG AND FOUND NO EVIDENCE OF FIRE. SMOKE AND SMELL HAD DISSIPATED INSIDE THE PLANE SO WE PROCEEDED TO THE GATE FOLLOWED BY EMER EQUIP. MAINT TOLD US THAT A RECIRCULATION FAN HAD FAILED AND HAD CAUSED THE PROB.

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.