Narrative:

On landing at [egll]; I was pilot flying (PF) flying the ILS 27L in VMC conditions. We were not rushed; I was configuring the aircraft for landing; but noticed that the power setting did not seem right to me - when I set normal approach power; I was gaining airspeed. I was struggling with power management from the FAF in.somewhere below 500 ft AGL; we got the 'too low; flaps' aural warning; and it wasn't until then that I realized I had never called for; and we had never set our final flaps; I had just stopped at gear down; flaps 20. The captain immediately selected flaps 25; and we landed uneventfully at flaps 25.I would say fatigue was definitely a factor. I did not feel sleepy; but after being up all night we were given 10 minutes of holding on the arrival and were in a higher-than-normal workload situation during the time leading up to the approach. I felt that I was fixating on speed control without even realizing that I was not getting the aircraft fully configured by 1000 ft AGL.I apologized to my crew mates after gate arrival; and the captain stated; 'well; there were three of us up here'.by way of prevention; I can only state that I will be more aware of where I am in the landing checklist in order to prevent an event like this from occurring in the future.[company representative] debriefed me on the event [the next day] at great length; with the outcome being my understanding of the absolute necessity of executing a go around no matter what if the aircraft is not stabilized by 1000 ft. Another causal factor in this event was distraction; prior to departure I was made aware of a family crisis unfolding that was a stressor to me; but I decided to 'complete the mission'. In retrospect; the smartest and safest course of action on my part should have been to have myself removed from the sequence to deal with family issues.

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Original NASA ASRS Text

Title: B767-300ER international flight crew reported they failed to select final flaps in a timely manner creating an unstabilized approach scenario; and they then failed to execute a go-around. Fatigue was cited as a factor by the pilot flying.

Narrative: On landing at [EGLL]; I was pilot flying (PF) flying the ILS 27L in VMC conditions. We were not rushed; I was configuring the aircraft for landing; but noticed that the power setting did not seem right to me - when I set normal approach power; I was gaining airspeed. I was struggling with power management from the FAF in.Somewhere below 500 ft AGL; we got the 'too low; flaps' aural warning; and it wasn't until then that I realized I had never called for; and we had never set our final flaps; I had just stopped at gear down; flaps 20. The Captain immediately selected flaps 25; and we landed uneventfully at flaps 25.I would say fatigue was definitely a factor. I did not feel sleepy; but after being up all night we were given 10 minutes of holding on the arrival and were in a higher-than-normal workload situation during the time leading up to the approach. I felt that I was fixating on speed control without even realizing that I was not getting the aircraft fully configured by 1000 ft AGL.I apologized to my crew mates after gate arrival; and the Captain stated; 'well; there were three of us up here'.By way of prevention; I can only state that I will be more aware of where I am in the landing checklist in order to prevent an event like this from occurring in the future.[Company representative] debriefed me on the event [the next day] at great length; with the outcome being my understanding of the absolute necessity of executing a go around no matter what if the aircraft is not stabilized by 1000 ft. Another causal factor in this event was distraction; prior to departure I was made aware of a family crisis unfolding that was a stressor to me; but I decided to 'complete the mission'. In retrospect; the smartest and safest course of action on my part should have been to have myself removed from the sequence to deal with family issues.

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.