Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Last 90 Days 144; Flight Crew Type 924
Fatigue; Situational Awareness
Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Human Factors
Did not realize how tired and fatigued I was after agreeing to a 30 minute FDP (Flight Duty Period) extension until we were on the takeoff roll above 100 knots and I had called 'V1' and then I started to call 'Rotate' as the airplane passed through the V1 bug a full 10 knots below our planned rotation speed that was bugged at 139 knots. I had briefed the speeds with the Captain on the before takeoff checklist not two minutes prior. I also failed to catch that the approach mode was not armed for the approach as we flew through the glide slope intercept.
A320 First Officer reported several deviations from Standard Operating Procedure; as a result of fatigue.