What was found
ATB AFTER TAKE OFF, FIRE/ OVERHEAT SYS ON EICAS ILLUMINATED, STATUS MESSAGE RT ENG FIRE LP2 AND RT ENG FIRE LP1 DISPLAYED. RETURNED TO LAND. CYCLED RT-ENG FIRE DETECTOR CIRCUIT BREAKERS, AFTER THEN FIRE & OVERHEAT TEST OK IAW AMM26-10-00, NO STATUS MESSAGE.