Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 436
Situational Awareness
Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued New Clearance; Flight Crew Became Reoriented; Flight Crew Returned To Clearance
Human Factors
After being cleared to fly the RNAV (RNP) Z Runway 26L Approach; I programmed the FMC incorrectly and proceeded to brief the approach. When passing SARRT waypoint the aircraft proceeded to CABNU instead of FINAB. I even commented on how it was odd that the route was away from the field. Approach inquired which approach we were flying and we incorrectly stated RNAV Z 26L. Approach Control canceled our approach clearance and issued a vector; asked if we had the runway in sight; which we did; and cleared us for a visual approach to Runway 26L. We switched frequency to Tower and were cleared to land. The Crew should have been more diligent in our briefing to verify that the runway programmed was the proper and intended runway. The mistake was easy to make because of the Runway 22 RNAV Z and 26L RNAV Z being on adjacent keys in the FMS. A more thorough briefing would have caught the programming error.
B737-700 Captain reported a programming error resulted in a track deviation on the RNAV (RNP) Z Runway 26L Approach at ELP.