Any manoeuvre not required for normal helicopter instrument flying is an unusual attitude and may be caused by any one or a combination of factors, such as turbulence, disorientation, instrument failure, confusion, preoccupation with flight deck duties, carelessness in cross-checking, errors in instrument interpretation, or lack of proficiency in aircraft control.
As soon as an unusual attitude is detected, make a recovery to straight-and-level flight as soon as possible with a minimum loss of altitude.
To recover from an unusual attitude, a pilot should correct bank-and-pitch attitude and adjust power as necessary.
All components are changed almost simultaneously, with little lead of one over the other.
If the helicopter is in a climbing or descending turn, adjust bank, pitch and power.
Aircraft is in a banked left and pitched down attitude. VSI shows a high rate of descent and turn and slip indicator confirms the situation.
In case of a delayed corrective action air speed will increase dangerously.
First action is applying enough right cyclic to correct bank attitude and enough left rudder to ensure trimmed flight.
Reference instruments are turn-and-slip indicator and attitude indicator.
Second action is applying enough back cyclic to correct pitch down attitude.
Cyclic application should be in coordination with VSI to ensure a zero climb and descent attitude.
Reference instruments are altimeter, airspeed indicator, VSI and attitude indicator.
Last action is to adjust power to ensure a level flight at desired airspeed and altitude.
Reference instruments are airspeed indicator and manifold pressure/torque
Now the aircraft is in Straight and Level Flight.