Date: 201604
Local time of day: 1201-1800
Location: LAX.Airport, CA
Aircraft: Large Transport
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Parked
Reporter organization: Air Carrier
Reporter function: First Officer; Pilot Not Flying
Reporter qualification: Flight Crew Air Transport Pilot (ATP)
Human factors: Fatigue
Anomaly: Other Fatigue
Detector: Person Flight Crew
When detected: In-flight
Result: Flight Crew Took Evasive Action; General Work Refused
Contributing factors: Human Factors
Primary problem: Human Factors

Narrative: The night prior I had a lot of trouble sleeping because the room was insanely hot. I turned the temperature as low as it would go; but it was still sweltering. I got maybe 4 hours of sleep. My wakeup call was for XA:00 for a XB:10 van. Immediately we had problems due to gate issues (another aircraft on our gate). As soon as we were ready for pushback; the flight attendant called up to say a nervous passenger wanted to deplane. After deplaning said passenger; the Captain became concerned because he had seen this passenger at the gate with another passenger and things just didn't add up; so after consulting with the Duty Manager and Dispatch; we had to bring the jetway back again; to remove the second passenger. We were now late. As soon as we pushed back; we noticed a line of at least 20 aircraft ahead of us for departure. By the time we got airborne we were over an hour late. Enroute the Captain sent crew scheduling a message indicating that we would not make it in time for our next scheduled flight. Crew scheduling wrote back saying that they had reassigned us to do an LAX turn after arriving. We would keep the same plane.We land and proceed to hurry through Customs and go back to the aircraft for our LAX turn. By the time we got back; about 30 minutes later; the aircraft was pushing back! The agent says: oh; if you're here for LAX; that has been moved to another gate. So off I go. When we arrive; the plane is just pulling up. Now we are looking at our watches because we are already at least 30 minutes later that our XH:30 departure time and it becomes evident that our duty day is going to easily go over 12 hours. We turn the plane as quickly as possible; and launch for LAX.It was about this time that I started making errors. I missed a call from Tower to go into position and hold. The Captain caught it and we departed. Enroute I made several more communications errors; using incorrect and previous call signs. The flight attendants called the cockpit with our meals; and I just looked at the Captain. I did not respond to them. I'm really not sure why. We were given several crossing restrictions from SoCal approach and I was having trouble getting them into the FMC correctly. As we turned downwind and were cleared for a visual approach; the Captain asked me to extend the centerline in the FMC. I went to do that and looked at the box and I literally could not remember how. I've done this thousands of times. It was then that I realized I was fatigued and I needed to remove myself from flight status; which I did after we blocked in.




Synopsis: Air carrier First Officer described a fatiguing trip and mistakes that he made; necessitating a fatigue call.