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Go-around from Low Airspeed/Low Thrust
From SKYbrary Wiki
| Article Information | ||
|---|---|---|
| Category: | Loss of Control | 
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| Content source: | Flight Safety Foundation | 
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| Content control: | EUROCONTROL | 
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When a go-around is initiated with the aircraft in landing configuration (landing gear, flaps etc. extended) a loss of altitude is inevitable while the engine accelerates and the pitch change and increased power take effect.
If the aircraft speed is below the final approach speed (VAPP), the situation may be unstable, necessitating extra power to maintain that speed.
When speed or thrust are low, or decreasing, or a combination of these, the loss of altitude after selection of go-around power is many times greater than if the speed VAPP was maintained and the power stable. The figure below, which is taken from Flight Safety Foundation (FSF) Approach-and-landing Accident Reduction (ALAR) Briefing Note 4.2 — Energy Management, illustrates this point clearly.
The briefing note concludes that:
"Deceleration below the final approach speed should be allowed only during the following maneuvers:
- Terrain-avoidance maneuver;
- Collision-avoidance maneuver; or,
- Wind shear recovery maneuver.
"Nevertheless, during all three maneuvers, the throttle levers must be advanced to maximum thrust (i.e., go-around thrust) while initiating the maneuver."
Further Reading
Flight Safety Foundation
The Flight Safety Foundation ALAR Toolkit provides useful training information and guides to best practiceand copies af all the Briefing Notes are on the SKYbrary Bookshelf and may be accessed via the link above. Copies of the FSF ALAR Toolkit on CD may also be obtained from the Flight Safety Foundation[1]
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