<< >> NASA ASRS Report 788625, May 2008

A B767-300 flight crew experienced elec fumes in the cockpit and cabin which dissipated when utility busses were turned off. They returned to their departure airport.

Attributes
ACN	788625
Time
Date	200805
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zzz.artcc
Operator	common carrier : air carrier
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Route In Use	enroute : other oceanic
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	788625
Events
Anomaly	aircraft equipment problem : critical other anomaly
Independent Detector	other flight crewa
Resolutory Action	flight crew : landed as precaution other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

During an oceanic flight; all 3 cockpit crew members began to smell an electrical/burning odor. Approximately 30 seconds later; mid cabin flight attendant called stating same; only more intense than in cockpit. We donned oxygen; began electrical fire/smoke checklist. After first step; when utility busses off; odor dissipated. Phone patch dispatch/maintenance control; flight attendants reported becoming ill. Coordination air turnback with ATC. Descended to FL310 and returned to ZZZ. Landed under maximum weight.

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Original NASA ASRS Text

Title: A B767-300 FLT CREW EXPERIENCED ELEC FUMES IN THE COCKPIT AND CABIN WHICH DISSIPATED WHEN UTILITY BUSSES WERE TURNED OFF. THEY RETURNED TO THEIR DEP ARPT.

Narrative: DURING AN OCEANIC FLT; ALL 3 COCKPIT CREW MEMBERS BEGAN TO SMELL AN ELECTRICAL/BURNING ODOR. APPROX 30 SECONDS LATER; MID CABIN FLT ATTENDANT CALLED STATING SAME; ONLY MORE INTENSE THAN IN COCKPIT. WE DONNED OXYGEN; BEGAN ELECTRICAL FIRE/SMOKE CHKLIST. AFTER FIRST STEP; WHEN UTILITY BUSSES OFF; ODOR DISSIPATED. PHONE PATCH DISPATCH/MAINT CTL; FLT ATTENDANTS RPTED BECOMING ILL. COORD AIR TURNBACK WITH ATC. DSNDED TO FL310 AND RETURNED TO ZZZ. LANDED UNDER MAX WT.

Data retrieved from NASA's ASRS site as of May 2009 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.