 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
B737 captain reported that a GPWS terrain warning on a visual approach was apparently as a result of flap displacement due to wind gusts.
| Attributes | |
| ACN | 1503940 |
| Time | |
| Date | 201712 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Landing |
| Route In Use | Visual Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Flap/Slat Indication |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Type 492 |
| Events | |
| Anomaly | Deviation - Procedural Published Material / Policy Deviation - Speed All Types Inflight Event / Encounter Unstabilized Approach Inflight Event / Encounter Weather / Turbulence |
Narrative:
Flying visual approach. Gusty wind conditions; last reported tower wind 28024g36; final landing configuration; reference 168; max flap 30 speed 171. Disconnected autopilot and auto throttles turning final; about 500 ft. On visual and FMC generated glide path; received several 'too low terrain' warnings from GPWS. Verified aircraft configuration and terrain was not a factor; continued and landed without incident.after landing; with flap handle in the 30 detent; flap indicator was just outside the 30 white band; short of the band. Flaps had been verified in the 30 detent and white band on landing checklist. Cycled flaps on taxi in and found normal operation; [I] believe gust on short final triggered flap load relief. No overspeed warnings received in cockpit; and no overspeed observed in cockpit.
Original NASA ASRS Text
Title: B737 Captain reported that a GPWS Terrain warning on a visual approach was apparently as a result of flap displacement due to wind gusts.
Narrative: Flying Visual approach. Gusty wind conditions; last reported Tower wind 28024G36; final landing configuration; Reference 168; max Flap 30 speed 171. Disconnected Autopilot and Auto throttles turning final; about 500 ft. On visual and FMC generated glide path; received several 'Too Low Terrain' warnings from GPWS. Verified Aircraft configuration and terrain was not a factor; continued and landed without incident.After landing; with flap handle in the 30 detent; flap indicator was just outside the 30 white band; short of the band. Flaps had been verified in the 30 detent and white band on landing checklist. Cycled flaps on taxi in and found normal operation; [I] believe gust on short final triggered flap load relief. No overspeed warnings received in cockpit; and no overspeed observed in cockpit.
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.