ELEVATOR TRIM STALL

Description

A stall resulting from application of full power during a go-around when positive control of the airplane is not maintained.

Objective

To demonstrate recovery procedures for overcoming strong trim forces and how to maintain control of the airplane by using proper and timely trim techniques.

Setup

·         Clear the area

·         Choose forced landing area

·         Configure aircraft for final approach for landing: CCGUMPS, approach power (C172RG: 15” Hg, 2700 RPM), full flaps down, gear extended, carburetor heat on, altitude so recovery is ≥1500’ AGL

·         Select outside references

·         Reduce power to idle

·         Maintain altitude until normal glide speed is reached (C172RG: 65 KIAS)

·         Trim nose up (full up for best effect) to simulate landing approach to maintain final approach speed

·         Apply full power to simulate a go-around

o        The combined forces of power, engine torque, back elevator trim will make the nose pitch up sharply with a left-turning tendency; as the pitch attitude increases to a point well above normal climb attitude, the potential for a stall exists

Recovery

·         Immediately apply positive forward elevator pressure to lower nose and return to normal climbing attitude

·         Trim to relieve excessive control pressure

·         Continue normal go-around procedures and level off at the desired altitude

·         Maintain ball centered

·         Look for traffic

 

It is imperative that a stall not occur during an actual go-around as there may not be sufficient altitude to recover.

References

FAA-H-8083-3A Airplane Flying Handbook p. 4-11

JS314510-001 Jeppesen Guided Flight Discovery Private Pilot Maneuvers p. 5-13