Air Carrier flight crew reported multiple left engine malfunctions during takeoff. Flight crew performed an air turn back to departure airport where a safe landing was completed and maintenance was provided.
Synopsis
Air Carrier flight crew reported multiple left engine malfunctions during takeoff. Flight crew performed an air turn back to departure airport where a safe landing was completed and maintenance was provided.
Narrative
During TO Roll at 120 kts. L FF blanked. In climb out after gear retraction the L EPR blanked followed by an EEC L EICAS message. Cabin Crew alerted Flight Deck of sparks and noise from left engine. We [requested priority handling] and requested to stop climb at 3;000 ft. and return to ZZZ. The FO (First Officer) was flying and talking to ATC. The Relief Pilot and I ran the EEC L non normal check list. Then contacted ZZZ Operations to relay our return to Dispatch. We proceeded downwind and continued to run the Non-routine and overweight landing checklists. We decided to land overweight after reviewing the secondary engine instruments which showed nothing abnormal. The FO landed the Aircraft at 604;700 lbs on the longest runway with both engines operating ; max reverse thrust was used til 60 kts. We exited the runway at the end and held in a holding area prior to the taxiway. We then asked emergency personnel to look at our left engine for any sign of damage or fire. They informed us all clear. We waited for ZZZ Maintenance to arrive with the tug and inspect our brakes; tires and engine prior to being towed to a hard stand. The FO did a fantastic job flying and communicating with ATC; the landing was smooth and no issues with brake temp or tires. The Relief Pilot was an unbelievable asset during this time; communicating and running checklists as well as monitoring the CA (Captain) and FO. Excellent job!
Second reporter narrative
After takeoff and gear retraction; left EPR blanked out followed by EEC L EICAS message. The Cabin Crew called the flight deck and stated sparks were seen out of the left engine. We [requested priority handling] and returned to ZZZZ airport. The FO (First Officer) was flying and talking to ATC. The Captain and Relief Pilot ran the EECL. [The Relief Pilot also contacted Operations to notify Dispatch. We proceeded to Runway XX while conducting the Non-routine Landing and Overweight Landing checklists. The secondary engine instruments showed no abnormal indications. The FO landed the aircraft at 604;700 lbs. on longest runway with both engines operating. Max reverse was used until 60 kts.; then minimum braking was applied. Aircraft exited at the end of Runway XX. [Airport response] equipment looked over left engine for signs of damage or fire. None was seen. Maintenance then inspected the gear; tires; brakes and engine before being towed to a hard stand for parking. Entire crew performed their duties professionally and diligently.Cause: Turbine bypass malfunction.
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Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.