B767 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 180; Flight Crew Total 3468.13; Flight Crew Type 2544.38
Situational Awareness; Training / Qualification
Aircraft Equipment Problem Less Severe; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued Advisory / Alert; Air Traffic Control Issued New Clearance; Flight Crew Became Reoriented; Flight Crew Returned To Clearance
Procedure; Aircraft; Human Factors
Approaching IAH ATIS advertised possibility of receiving RNAV (RNP) 26R. Captain did a thorough STAR and approach briefing using the 767 QRG RNAV (RNP) Approach Briefing Guide. ATC cleared; and crew loaded; verified; and executed DRILLR5 STAR connecting to line selectable RNAV (RNP) 26R. There was no discontinuity on LEGS page of FMC. It read: SKLER-DRKAR-VECTORS-SOOPR-OWELL... to the runway. HSI magenta line showed a line continuing straight ahead from DRKAR as well as a curved RF path between DRKAR and SOOPR. Left autopilot was on and connected; and [mnemonic] procedure completed with TDZE altitude set in MCP. During the arrival briefing; I brought up that 'VECTORS' was in the LEGS page between DRKAR and SOOPR. However; PLAN and MAP mode showed the RF as stated above; with a curved RF path connecting DRKAR and SOOPR. After complete discussion among the flight deck crew; and referencing the QRH Briefing Guide (specifically under FMC Setup/LEGS 'Do not add or delete waypoints between the FAF/FAP/GP Intercept and the RWY/MAP inclusive') the entire crew expected the aircraft to follow the leg to SOOPR. Instead; after passing DRKAR the aircraft continued on 087 degrees heading/vector. Within 10 seconds; and before Captain could react; ATC advised that we were late to make the turn; and needed to discontinue the RNAV (RNP) 26R. ATC changed approach to vectors ILS 26R. Subsequent approach and landing were normal.
B767 First Officer reported a track deviation occurred on the RNAV (RNP) 26R arrival to IAH even though the FMC seemed to be programmed properly.