Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Workload; Troubleshooting
Aircraft Equipment Problem Critical
Flight Crew Landed in Emergency Condition; General Flight Cancelled / Delayed; General Maintenance Action
Aircraft
While on ILS approach to Runway XXC at ZZZ; approaching the FAF; we were configured with gear down and flaps at 20 and were planning a flaps 25 approach and landing. At this point we felt a slight rumble or shudder and the First Officer and I commented to each other that that felt kind of strange but nothing seemed out of the ordinary; however shortly after that the aircraft went through an electrical power transfer and the autopilot kicked off. We also had multiple EICAS messages. Initially we thought we had just lost the left generator; as there was no noticeable yawing tendency; and ran the Generator Off checklist. The generator did not reset. As I started to scan all the EICAS messages; I noticed that the left engine instruments were all spooled back and at that time realized the left engine had failed. It was not intuitive as the plane showed no yawing or rolling tendency initially. At this point we were at or inside the FAF. We [requested priority handling] with Tower and advised them we had lost the left engine and were continuing for landing on Runway XXC. The first officer grabbed the QRC and quickly ran through the ENGINE FIRE SEVERE DAMAGE or SEPARATION checklist. The checklist was completed and airspeed bugs set for flaps 20 landing. The landing was uneventful and we slowed to taxi speed and cleared the runway to the right at the high speed turnoff then pulled on to Taxiway P and stopped for emergency vehicles to inspect the left engine. After fire and rescue inspected the engine; they advised us there was no visible sign of engine damage or fluid leakage. Believing the engine was no threat we coordinated to continue the taxi to the ramp; and emergency vehicles followed us to parking with no further issues. Although things were time compressed; we both felt we had run the necessary checklist and were prepared and set up for the single engine landing. Getting the plane safely on the ground as soon as possible was the priority as we did not know why the left engine had failed.
Just inside the FAF and descending on glide path for Runway XXC at ZZZ; we heard a subtle; odd sound (maybe a couple of thumps?) and immediately afterwards; the Master Caution light illuminated and I think the autopilot kicked off. We noticed the left generator was off line. The Captain asked me to run the Generator Off checklist. I did this and it did not reset. While I was running this checklist; more EICAS messages came up indicating #1 engine failure. At that point we were already at Gear Down and Flaps 20. The Captain commented that the engine appeared seized. I looked at the Engine instruments and notice EGT and Oil Press gauges were red. EGT had reached 680 and Oil Pressure was low. It was obvious the #1 Engine had some sort of major failure. He stated intentions to me that we would land single engine and remain at Flaps 20 and for me to run the Engine Fire Severe Damage Checklist. It was a bit rushed being on short final but I was able to accomplish most of the checklist with the exception of the Flap Over-ride switch which was self-critiquing when its verbal warning sounded. Somewhere during all that; I [requested priority handling] and told Tower we would taxi clear and then have Fire & Rescue check our condition. After an uneventful landing; we taxied clear and ran the after landing checklist. Fire and Rescue gave us the all clear on the #1 Engine and aircraft in general and we elected to taxi back to the ramp using normal procedures. After a brief discussion with Maintenance; we departed the aircraft and the Captain filed an event report.
Flight Crew reported engine failure at final approach fix which caused them to request priority handling and continue to landing.