B777 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP); Flight Crew Commercial; Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Last 90 Days 190; Flight Crew Total 15818; Flight Crew Type 1376
Troubleshooting
Aircraft Equipment Problem Less Severe; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Flight Crew Overcame Equipment Problem
Aircraft
Level at FL370; we were given a speed reduction to .78 mach.  As the throttles retarded to idle; the First Officer noticed a small bluish puff of smoke in the area of his side window.  He also noticed a slight oily smell.  The smoke and smell quickly dissipated.  I did not see the smoke nor did I smell anything out of the ordinary.  As we started our descent; the throttles again came to idle and the First Officer again saw and smelled the smoke.  We had two jump seaters in the cockpit and they noticed the smoke as well at this time.  Again; the smoke quickly dissipated.  As we continued the arrival; the power increased and retarded to idle approximately 7-8 more times.  The smoke appeared and quickly dissipated two more times.  After the fourth idle reduction; the smoke no longer appeared.  During the descent; I called the Purser in the cabin and inquired if smoke or fumes were present.  She replied no and would ask the rest of the cabin crew.  She called back shortly and stated that no one noticed smoke or fumes in the cabin.  The Smoke; Fire or Fumes Checklist was reviewed; but not accomplished.  A message was sent to Technical Support Maintenance Control asking for Maintenance to meet the aircraft.  The event was entered in to the Maintenance Log and a smoke questionnaire was completed by the cockpit crew.
Air carrier flight crew noticed a small amount of smoke near the co-pilot side cockpit window. The smoke appeared several more times. The smoke dissipated and never returned and the aircraft landed without incident.