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B737-800 flight crew on approach received multiple aural and icas warning indications and elected to abandon the approach. In VMC they circled and landed without incident.
| Attributes | |
| ACN | 1050712 |
| Time | |
| Date | 201211 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZZ.Airport |
| State Reference | FO |
| Environment | |
| Flight Conditions | Mixed |
| Aircraft 1 | |
| Make Model Name | B737-800 |
| Flight Phase | Final Approach |
| Component | |
| Aircraft Component | Navigational Equipment and Processing |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Inflight Event / Encounter Unstabilized Approach |
Narrative:
Landing at destination airport we did an RNAV approach. With flaps 15 at 2;000 ft the gear warning horn and configuration light and icas activated and to stop it we had to put the gear down as we passed 1;700 ft and with VNAV path the slope jumped to 650 ft. I leveled out the plane as this was not right. We broke out of the weather over the runway at 1;500 ft; the FMS still telling us the runway was still 2.5 miles ahead as we went over the runway now in VMC conditions. I was able to circle to the left and come in and land safely. We think we either had a map shift or a radar altimeter problem. We put it in the book and had maintenance check it out: they found nothing. On the first sign of an abnormal situation such as the gear horn coming on when not supposed to; it should have been a clue of other things that could go bad. If this happened in mountainous terrain; I may have been more spring loaded to go around sooner. As these airplanes get older we have to be very alert to strange things. I hope we get the new planes soon.
Original NASA ASRS Text
Title: B737-800 flight crew on approach received multiple aural and ICAS warning indications and elected to abandon the approach. In VMC they circled and landed without incident.
Narrative: Landing at destination airport we did an RNAV approach. With flaps 15 at 2;000 FT the gear warning horn and configuration light and ICAS activated and to stop it we had to put the gear down as we passed 1;700 FT and with VNAV path the slope jumped to 650 FT. I leveled out the plane as this was not right. We broke out of the weather over the runway at 1;500 FT; the FMS still telling us the runway was still 2.5 miles ahead as we went over the runway now in VMC conditions. I was able to circle to the left and come in and land safely. We think we either had a map shift or a radar altimeter problem. We put it in the book and had Maintenance check it out: they found nothing. On the first sign of an abnormal situation such as the gear horn coming on when not supposed to; it should have been a clue of other things that could go bad. If this happened in mountainous terrain; I may have been more spring loaded to go around sooner. As these airplanes get older we have to be very alert to strange things. I hope we get the new planes soon.
Data retrieved from NASA's ASRS site as of July 2013 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.