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737 flight crew reported being changed to an ILS and not remembering what runway it was; but the flight ended up going around due to an un-stabilized approach and RNAV/ILS changes.
| Attributes | |
| ACN | 1593787 |
| Time | |
| Date | 201811 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | DEN.Airport |
| State Reference | CO |
| Environment | |
| Flight Conditions | IMC |
| Aircraft 1 | |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Route In Use | STAR ANCHR |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Not Flying First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument |
| Experience | Flight Crew Last 90 Days 155 Flight Crew Type 263 |
| Person 2 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Commercial Flight Crew Instrument |
| Experience | Flight Crew Last 90 Days 180 Flight Crew Total 8792 |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Inflight Event / Encounter Unstabilized Approach |
Narrative:
While on the anchr 4 arrival into denver for an RNAV approach; approach control reassigned us to an ILS approach; I believe; for runway 35L; though it could've initially been 35R; I can't remember for sure. We quickly re-briefed the approach; and prepared for it. The runway assignment was then changed again to the other parallel runway 35L; or 35R; whichever ILS; we weren't assigned initially; as I mentioned above. This happened as we were preparing to intercept the localizer. We thought we could accept the new assignment and started setting up for it. After getting closer to the FAF; however; or perhaps slightly inside it; the captain; who was the flying pilot; decided it was safer to execute a go-around; so we could get lined up and better positioned for the approach again. We flew the go-around; and received vectors for the ILS 35R; I believe; and flew the approach and landed. As we were taxing in; ground control asked us to call denver ATC. We called them and found out that after being re-vectored for the approach; we had inadvertently switched back to denver tower too early; without clearance from approach control.
Original NASA ASRS Text
Title: 737 flight crew reported being changed to an ILS and not remembering what runway it was; but the flight ended up going around due to an un-stabilized approach and RNAV/ILS changes.
Narrative: While on the ANCHR 4 Arrival into Denver for an RNAV approach; Approach Control reassigned us to an ILS approach; I believe; for Runway 35L; though it could've initially been 35R; I can't remember for sure. We quickly re-briefed the approach; and prepared for it. The runway assignment was then changed again to the other parallel Runway 35L; or 35R; whichever ILS; we weren't assigned initially; as I mentioned above. This happened as we were preparing to intercept the localizer. We thought we could accept the new assignment and started setting up for it. After getting closer to the FAF; however; or perhaps slightly inside it; the Captain; who was the flying pilot; decided it was safer to execute a go-around; so we could get lined up and better positioned for the approach again. We flew the go-around; and received vectors for the ILS 35R; I believe; and flew the approach and landed. As we were taxing in; Ground Control asked us to call Denver ATC. We called them and found out that after being re-vectored for the approach; we had inadvertently switched back to Denver Tower too early; without clearance from Approach Control.
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.