7.29. Stall Recovery

[In this section discuss the procedures for recovery from an impending stall. The objective for most Aeroplane is to prevent the situation from progressing to an actual stall. If your Aeroplane has no stall warning system or if your organization is allowed to dispatch with the stall warning system unserviceable, also detail the procedure for recovery from an actual stall.]

[In developing the procedures to recover from an impending stall we recommend that you link to other existing procedures as much as possible. Stalls seldom occur operationally. Therefore, if the stall recovery procedure is substantially similar to another procedure that is used more frequently, there is a higher likelihood of success. In the following example, the stall recovery procedure is essentially a variation of the missed approach procedure.]

[In our example, the fictitious turboprop Aeroplane has a stick shaker system to warn of an impending stall. The Aeroplane is not permitted to dispatch with an unserviceable stall warning system. Also, in order to carry out a recovery from a full flap configuration the flaps must be partially retracted.]

  1. Stall Indications and Recovery Requirements — The first indication of an impending stall for the [insert Aeroplane type] is high angle of attack and low airspeed. If the impending stall is detected at this point - prior to the activation of the stick shaker, it may be corrected by the crew by increasing the airspeed and reducing the angle of attack. An impending stall that is corrected prior to the activation of the stick shaker does not require that the crew abandon the approach or other procedure that is being carried out. If the situation progresses to the activation of the stick shaker, the procedure being flown should be abandoned and the priority changed to a stall recovery.
  2. Stall Recovery Procedures — The following procedure should be used to recover from an impending stall when the stick shaker has activated. This procedure may also be used should the crew determine that recovery from an impending stall is appropriate even before the stick shaker has activated.
    1. The Pilot should simultaneously: relax back pressure on the control column; advance the power levers; and set power to "Go Around", Set Flaps Approach" if full flap has been extended.
    2. The Pilot should roll the wings level (if the Aeroplane is in a bank) and maintain speed just above the stick shaker activation. The stick shaker may briefly activate during the initial recovery.
    3. The Pilot should then carry out the Missed Approach procedure described in the Normal Flight Procedures - Arrival chapter.
    4. The objective is to fly the Aeroplane out of a very hazardous situation. However, consideration must also be given to levelling the Aeroplane at an altitude that will not pose another problem. Such an altitude could be the assigned altitude, the instrument missed approach termination altitude, or applicable minimum safe altitude.

 
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