Date: 201510
Local time of day: 0601-1200
Location: ZHU.ARTCC, TX
Flight conditions: VMC
Aircraft: Widebody Transport
Operator: Air Carrier
Operating under: Part 121
Flight phase: Descent
Airspace: Class A ZHU
ATC / advisory: Center ZHU
Aircraft component: FMS/FMC
Component problem: Improperly Operated
Reporter organization: Air Carrier
Reporter function: Pilot Not Flying; First Officer
Reporter qualification: Flight Crew Air Transport Pilot (ATP)
Human factors: Confusion; Situational Awareness
Anomaly: Deviation - Speed All Types; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance
Detector: Person Flight Crew
When detected: In-flight
Result: Flight Crew Became Reoriented; Flight Crew Returned To Clearance
Contributing factors: Human Factors
Primary problem: Human Factors

Narrative: An hour prior to arrival in Houston I called door 2L and asked the flight attendant to wake the flying First Officer. A couple minutes later the Captain's dinner came up and I was able to see that the flying First Officer was awake with the crew rest curtain put away. At this time to TTORO3 RNAV was loaded in the box with all the correct airspeeds and altitude restrictions double checked. The 8R approach was also loaded but with no transition from TTORO to 8R as TTORO was presently our clearance limit. Approximately 34 minutes prior to touchdown the Captain and I both expressed concern that the other First Officer had not returned to the flight deck. At this time Houston Center instructed us to descend from FL390 to FL330. At this time the Captain called door 1L and asked where the other First Officer was. A couple minutes later he returned to the flight deck and stated he had never received his wake up call. Later I discovered the flight attendant did not give it to him as he was already awake with the curtain put away. At this point I went to the bathroom and upon my return I discovered the PF (flying First Officer) was attempting to verify the MSCOT4 RNAV arrival and I pointed out we were cleared for the TTORO3 RNAV. It appears that during my time in the back either someone changed the box or it had a glitch as now only the first restriction was entered. Once the 2nd restriction was entered it was clear we were over 3;000 plus feet high and needed the speed brake deployed immediately. The Captain told the PF he needed to fly the plane immediately and that he and I would worry about the box. After entering another restriction we realized that the airplane had entered VNAV path and that the PF had left the speedbrakes out. I noticed the plane was 30 knots slow and told the PF to accelerate. At this point the Captain stated that he was going to reboot the arrival and he reselected the approach and runway and immediately hit enter. This left us with the active waypoint 3 miles in front of us and a discontinuity. The Captain went to close the discontinuity and I told him that we were now missing 2 points and read him the next point to enter. At this time we crossed over the active point and went into HDG. After entering the point the Captain hit enter and told the PF he could LNAV to the point. I then gave the Captain the next point and its restrictions. At this time both the Captain and I noticed we were left of course and realized we were still in HDG. We told the PF to go to LNAV and we ended up 1.7 miles left of course before correcting. As we continued the approach I realized that someone had entered the TTORO transition. It is my guess that while I was in the lavatory the TTORO transition was entered and no one checked the arrival restrictions.




Synopsis: Air carrier flight crew describes a track deviation during arrival when the flying First Officer arrives late to the cockpit; stating that he did not receive his wake up call. The cleared arrival had been entered into the FMC previously; but the flying First Officer attempts to enter the flight planned arrival and the deviation occurs.