FLT DECK AND CABIN CREWS OF B777-222 TAKE PRECAUTIONS FOR ELECTRICAL ODORS PERCEIVED IN THE CABIN. FUMES DISSIPATE AND THE FLT CONTINUES TO DEST.

Narrative

I WAS THE CAPT OF A FLT; B777 OPERATING FROM LONDON. APPROX 8 HRS INTO THE FLT AT XA30Z WE WERE NOTIFIED BY THE PURSER THAT NUMEROUS PAX WERE DETECTING THE SMELL OF ELECTRICAL SMOKE IN THE BUSINESS CABIN. THIS ODOR WAS ALSO DETECTED BY THE FLT ATTENDANTS IN THE AFT CABIN. WE DID NOT NOTICE ANY COCKPIT INDICATION OF A PROB BUT AS A PRECAUTION WE REVIEWED THE SMOKE AND FUME ILLUMINATION CHKLIST AND REMOVED PWR FROM THE RECIRCULATION FANS; GASPER FANS; ALL GALLEY PWR AND PAX ENTERTAINMENT SYS. THE OVERHEAD FLUORESCENT LIGHTING WAS ALREADY OFF AND WE INSTRUCTED THE PURSER TO KEEP THESE LIGHTS OFF. WE CONSULTED WITH DISPATCH AND MAINT CTLR REGARDING THE ISSUE AND JOINTLY DETERMINED THAT SINCE THE ODOR WAS DISSIPATING AFTER THE REMOVAL OF THE PWR FROM THE SYS IT WAS SAFE TO CONTINUE THE FLT. WE ADVISED ATC OF THE ISSUE AND DSNDED TO A LOWER ALT AS A PRECAUTIONARY MEASURE AS WE CONTINUED ON TO DEST FOR AN UNEVENTFUL ARR. AFTER DEPLANING; WE CONDUCTED A JOINT DEBRIEF ON BOARD THE ACFT WITH THE CABIN CREW AND MAINT.