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B737 crew reported a course deviation on the STAR to lax when runway assigned was not the runway briefed and programmed into the FMC.
| Attributes | |
| ACN | 1425155 |
| Time | |
| Date | 201702 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | SCT.TRACON |
| State Reference | CA |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | FMS/FMC |
| Person 1 | |
| Function | First Officer Pilot Flying |
| Person 2 | |
| Function | Pilot Not Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 199 |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types |
Narrative:
On arrival into lax; before beginning the actual STAR we completed the briefings for the STAR and approach (which we had to make an assumption about and chose to brief 24R but also back up with 25L) so that we could complete our descent checklist. At this time the FMC was then loaded with 24R. During the descent on the STAR; after given the clearance by lax center to descend via we were cleared for the approach to 25L. Upon hearing this we changed our frequencies to 25L and minimums altitudes in our baro settings and both reviewed the chart for numbers for 25L verifying they were correctly entered. What we forgot to do was change the approach in the FMC which would change the transition after the riivr fix on the arrival. Shortly after passing riivr; I noticed the navigation tune disagree message and realized what we had done. As I quickly tried to fix what was in the FMC; ATC queried if we were lined up for 25L to which we responded we were fixing our course now. We were then on course to join the next fix on 25L which was krain. We were still probably at least 3 to 4 miles outside krain. ATC then made us stop the descent at 10;000' and make a 360 degree turn to rejoin the final for 25L and recleared us for the approach. Once established on that approach they switched us to 24R approach where we made a normal landing.
Original NASA ASRS Text
Title: B737 crew reported a course deviation on the STAR to LAX when runway assigned was not the runway briefed and programmed into the FMC.
Narrative: On arrival into LAX; before beginning the actual STAR we completed the briefings for the STAR and approach (which we had to make an assumption about and chose to brief 24R but also back up with 25L) so that we could complete our Descent Checklist. At this time the FMC was then loaded with 24R. During the descent on the STAR; after given the clearance by LAX Center to descend via we were cleared for the approach to 25L. Upon hearing this we changed our frequencies to 25L and minimums altitudes in our baro settings and both reviewed the chart for numbers for 25L verifying they were correctly entered. What we forgot to do was change the approach in the FMC which would change the transition after the RIIVR fix on the arrival. Shortly after passing RIIVR; I noticed the NAV tune disagree message and realized what we had done. As I quickly tried to fix what was in the FMC; ATC queried if we were lined up for 25L to which we responded we were fixing our course now. We were then on course to join the next fix on 25L which was KRAIN. We were still probably at least 3 to 4 miles outside KRAIN. ATC then made us stop the descent at 10;000' and make a 360 degree turn to rejoin the final for 25L and recleared us for the approach. Once established on that approach they switched us to 24R Approach where we made a normal landing.
Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.