ACS IH.IV.A

Elements related to attitude instrument flying during straight-and-level flight, climbs, turns, and descents while conducting various instrument flight procedures.

Interpretation, operation, and limitations of pitch, bank, and power instruments.

Normal and abnormal instrument indications and operations.

Situations that can affect physiology and degrade instrument cross-check.

Spatial disorientation and optical illusions.

Flying unfamiliar helicopter or operating with unfamiliar flight display systems and avionics.

Maintain altitude ±100 feet during level flight, selected headings ±10°, airspeed ±10 knots, and bank angles ±5° during turns.

Use proper instrument cross-check and interpretation, and apply the appropriate pitch, bank, power, and trim corrections when applicable.