Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 210; Flight Crew Total 15000; Flight Crew Type 11000
Aircraft Equipment Problem Less Severe; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Flight Crew Landed in Emergency Condition; Flight Crew Returned To Departure Airport
Aircraft
I was the working relief pilot. Shortly after gear was retracted; I saw and smelled an acrid smoke. Seconds later; EICAS message; 'Smoke detected crew rest F/D.' Donned O2. Called Flight Attendant at 1L with no answer. Later found out they couldn't hear the chime over smoke alarm. Smoke seemed to dissipate a bit. Captain directed me to go to bunk area to confirm issue. Smoke was in bunk room; smoke alarm at 1L; and smoke detected alert on cabin alert panel. No fire witnessed just smoke seen and smelled. Returned to cockpit donned mask as precaution once again. I coordinated the satcom call with dispatch. Dispatcher was very difficult to understand. Very thick accent. Relayed message that returning to [departure airport]... Asked for phone patch to [maintenance control]. Relayed info to him and told him of the choice to land overweight. By this time we are being vectored onto final. Landing uneventful; mindful of brake temps after landing.
The First International Relief Officer (IRO) tried to contact the cabin crew and was unable to reach anyone. The smell had almost completely dissipated but we could still hear the alarm coming from the back. The IRO looked through the door and could see the lead Fight Attendant standing in the hallway area. We decided to send her back into the cabin to assess the situation since we could not speak to the Flight Attendants. The second IRO was monitoring the communications in the cockpit and guarding the door. The first IRO checked the bunk area and could not find any evidence of the source of smell or faint hazy smoke.
B777 flight crew reported seeing and smelling acrid smoke accompanied by an EICAS message regarding smoke detected in crew rest area after takeoff.