Large Transport; Low Wing; 2 Turbojet Eng
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 182; Flight Crew Total 14399; Flight Crew Type 6754
Time Pressure; Confusion
ATC Issue All Types; Aircraft Equipment Problem Less Severe; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued New Clearance
Chart Or Publication; Human Factors; Procedure
Briefed the ILS 26L IAH prior to top of descent (DRLLR 5). Center delayed our descent due to traffic. When descent clearance was given; told to maintain 310 kts. or greater. We were already over 6;000 ft. above descent profile. We were able to get back on profile just prior to approach handoff. When switched to Approach Control; they told us to expect RNAV Y 26R. After positive aircraft transfer control; I loaded the RNAV 26R and briefed the approach. We were expecting vectors to final RNAV Y 26R. I became PF (Pilot Flying) again. We were still descending on the arrival passing through approximately 8;000 ft. and 6 miles from SKLER when approach cleared us the RNAV Y 26R approach. We then realized the RNAV approach started at SKLER and included an arc segment to final. The Captain reloaded the approach with the SKLER transition. As we approached SKLER; everything looked good as we accomplished approach procedures. Autopilot was still engaged. Approaching DRKAR; we were expecting the aircraft to start a right hand turn on the arc. It didn't turn as we continued straight ahead. Captain said we need to turn as I selected HDG SEL (Heading Select) to start a right hand turn on the arc. We were a couple seconds late to start the turn. At this time ATC said we were late on the turn and gave us vectors to intercept visual [Runway] 26R. Visual approach and landing were uneventful. We debriefed after block in and recreated load the FMC. Although the arc portion showed on the route; there was also a vectors line after DRKAR. We think this is why the aircraft didn't turn on the arc and maybe we needed to sequence the FMC.
First Officer reported not verifying the correct waypoint sequencing on RNAV approach due to a late clearance change from ATC.