B777 flight crew reported rejecting the takeoff due to an engine over temperature.

Attributes
ACN	1351329
Time
Date	201604
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZZ.Airport
State Reference	FO
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B777 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Component
Aircraft Component	Turbine Engine
Person 1
Function	Relief Pilot
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Total 4578 Flight Crew Type 2872
Person 2
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 220 Flight Crew Total 7154 Flight Crew Type 3420
Events
Anomaly	Aircraft Equipment Problem Less Severe Ground Event / Encounter FOD

Narrative:

Our pushback from the gate and taxi out were uneventful. I was in the right jumpseat and all I can see is the captain's instruments. Everything was done in accordance with SOP. We were cleared for takeoff and right after the 100 knot call; I observed some debris go across the aircraft's path from the right to the left. Just after the 100 knot call and seeing the debris the captain called 'reject; I have the aircraft'. The first officer made the call to tower to tell them that we rejected and to roll the trucks. After the aircraft stopped the other international relief officer made the remain seated call. The captain called for the rejected take-off checklist. I assisted the first officer with the checklist. Tower asked us to taxi clear and the captain said we needed a minute. We ran the checklist and as a crew we determined that we could taxi clear and back to the gate. It was at this time I learned the reason for the reject was an over temp on the left engine and the debris occurring roughly at the same time. I looked up the brake temp page in the FM to determine cooling time. The captain taxied back to the gate uneventfully. The hottest brake reached 4.9. We got to the gate and shutdown in accordance with SOP. Maintenance inspected the aircraft and we were told that it was safe to fly.

Original NASA ASRS Text

Title: B777 flight crew reported rejecting the takeoff due to an engine over temperature.

Narrative: Our pushback from the gate and taxi out were uneventful. I was in the right jumpseat and all I can see is the captain's instruments. Everything was done in accordance with SOP. We were cleared for takeoff and right after the 100 knot call; I observed some debris go across the aircraft's path from the right to the left. Just after the 100 knot call and seeing the debris the captain called 'reject; I have the aircraft'. The FO made the call to tower to tell them that we rejected and to roll the trucks. After the aircraft stopped the other IRO made the remain seated call. The captain called for the rejected take-off checklist. I assisted the FO with the checklist. Tower asked us to taxi clear and the captain said we needed a minute. We ran the checklist and as a crew we determined that we could taxi clear and back to the gate. It was at this time I learned the reason for the reject was an over temp on the left engine and the debris occurring roughly at the same time. I looked up the brake temp page in the FM to determine cooling time. The captain taxied back to the gate uneventfully. The hottest brake reached 4.9. We got to the gate and shutdown in accordance with SOP. Maintenance inspected the aircraft and we were told that it was safe to fly.

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.