B787-800
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Weight And Balance
Flight Crew Returned To Departure Airport; Flight Crew Landed As Precaution; General Maintenance Action
Aircraft
Climbing out of FL300 for FL360; upper crew compartment smoke EICAS and associated alarm went off. It was followed by bulk compartment heat EICAS. Ran checklist; communicated with flight attendants; recovered resting crew to cockpit. Alarm continued as did EICAS. Decision to return and prepare for overweight landing. All associated checklists were ran as well as all assessments. Crew coordination was excellent. Airport Rescue and Fire Fighting (ARFF) was notified and followed aircraft after landing. All temperature reports relayed to us. After no fire indications were communicated by ARFF; we taxied to gate. Parking checklist completed; logbook entry made.
I had just settled on the first break in the Overhead Flight Crew Rest (OFCR); when the smoke alarm and light came on. Captain called the rest area to tell me and the First Officer B about cockpit indications and that he and the First Officer were in the process of running the appropriate checklists. Both myself and the First Officer B proceeded to the cockpit to assist with all required checklists and preparation for an overweight landing. The Captain landed the aircraft safely and without incident.
B787 flight crew reported experiencing false fire and smoke indications climbing out of FL300; in the upper crew compartment and the bulk cargo compartment and returned to the departure airport.