Speed Brake Operation

Operating the speed brakes.

The upper and lower speed brakes must be operated simultaneously and symmetrically. This restriction is imposed because no analysis has been conducted to determine limitations required for asymmetrical operation of the speed brakes.

Be cautious when using speed brakes for approach control, because rate of descent approximately doubles with the speed brakes open.

Normally, the speed brake handles [13-14, fig. 5-4] are mechanically interconnected to ensure simultaneous and symmetrical operation of the speed brakes.