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Guest lime88888

Jammed Stab landing

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Guest lime88888

Hi,During a Jammed Stab landing, we have to fly the 744 with the elevator purely. It's mandated in the QRH that we have to adopt a higher approach speed of Vref30+20 for a Flap 25 landing. This also applies for the "Flaps Drive" QRH where flaps assymetry occurs.What is the aerodynamic reasoning for the highr approach speed? Why not just apply the usual flaps 30 approach with it's respective Vref30.Pse advise.

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Guest lou ross

This is only a guess, but with a jammed stab you are only getting effect from the elevators. Since the stab is jammed so it won't move, so therefore more speed is necessary to get effect from the elevators. That's my guess.louross.

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