Narrative:

After takeoff out of airport ZZZZ passing 8000 ft on we received right engine fire and flap red EICAS messages; followed shortly by left engine fire. Looked immediately to fire handles; they were not lit. Egts (exhaust gas temperature) showed normal for both engines. A host of EICAS messages suggested an electrical malfunction (additional messages included cabin pressure; main cargo door; among others.) ca [notified ATC] and we immediately returned to field. Fire trucks met the aircraft and reported no sign of fire.possible electrical or EICAS computer malfunction.

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Original NASA ASRS Text

Title: B757-200 First Officer reported multiple false alerts; including false engine fire warnings; from a probable EICAS malfunction.

Narrative: After takeoff out of Airport ZZZZ passing 8000 FT on we received R ENG FIRE and FLAP red EICAS messages; followed shortly by L ENG FIRE. Looked immediately to fire handles; they were not lit. EGTs (Exhaust Gas Temperature) showed normal for both engines. A host of EICAS messages suggested an electrical malfunction (additional messages included CABIN PRESSURE; MAIN CARGO DOOR; among others.) CA [notified ATC] and we immediately returned to field. Fire trucks met the aircraft and reported no sign of fire.Possible electrical or EICAS computer malfunction.

Data retrieved from NASA's ASRS site 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.