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B737 flight crew reported a track deviation occurred on the RNAV (Y) 26R approach to iah. Reporters stated the approach was given on downwind and reporters are not sure why the deviation occurred.
| Attributes | |
| ACN | 1543539 |
| Time | |
| Date | 201805 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | I90.TRACON |
| State Reference | TX |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 80 Flight Crew Total 5833.97 Flight Crew Type 2416.25 |
| Person 2 | |
| Function | Pilot Not Flying First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument |
| Experience | Flight Crew Type 562.75 |
| Events | |
| Anomaly | Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types |
Narrative:
On downwind; prior to skyler we were cleared RNAV (Y) 26R approach. We had scrambled to install it when asked by approach to set up for that (around domno). The FMC showed the vector out of skler so past skler we went direct drkar and had the magenta line for the turn to soopr. We were not in heading sel and I'm pretty sure we weren't in cws right; either. Anyway; the jet didn't start the turn and I went to heading sel and started the turn manually. About that time approach asked if we were turning - we were close to a mile outside the arc; and well outside the .11 rnp. It sure looked like everything was set up LNAV and VNAV pth...don't know what we did wrong.
Original NASA ASRS Text
Title: B737 flight crew reported a track deviation occurred on the RNAV (Y) 26R approach to IAH. Reporters stated the approach was given on downwind and reporters are not sure why the deviation occurred.
Narrative: On downwind; prior to SKYLER we were cleared RNAV (Y) 26R approach. We had scrambled to install it when asked by Approach to set up for that (around DOMNO). The FMC showed the vector out of SKLER so past SKLER we went direct DRKAR and had the magenta line for the turn to SOOPR. We were NOT in HDG SEL and I'm pretty sure we weren't in CWS R; either. Anyway; the jet didn't start the turn and I went to HDG SEL and started the turn manually. About that time Approach asked if we were turning - we were close to a mile outside the arc; and well outside the .11 RNP. It sure looked like everything was set up LNAV and VNAV PTH...don't know what we did wrong.
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.