B737 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Type 492
Deviation - Speed All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Unstabilized Approach; Inflight Event / Encounter Weather / Turbulence
General None Reported / Taken
Aircraft; Weather
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.
B737 Captain reported that a GPWS Terrain warning on a visual approach was apparently as a result of flap displacement due to wind gusts.