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PA.VIII.C.K1aFAA-S-ACS-6C · Nov 2023Knowledge

a. Instrument limitations and potential errors

ACS element text (the applicant demonstrates understanding of)

Flight instruments as they relate to: a. Instrument limitations and potential errors

Bottom line

A pilot needs to be able to recognize associated errors and malfunctions of flight instruments. Airspeed error is generally greatest at low airspeeds; in the cruising and higher airspeed ranges, IAS and CAS are approximately the same.

Key numbers

Key numbers for a. Instrument limitations and potential errors
NumberWhat it means
several knots at certain airspeeds and flap settingsAirspeed error

FAA references

  1. PHAK ch. 8 (p. 8-1) — FAA-H-8083-25C (2023)
  2. PHAK ch. 8 (p. 8-9) — FAA-H-8083-25C (2023)
  3. AFH ch. 9 (p. 9-13) — FAA-H-8083-3C
  4. IPH ch. 4 (p. 4-33) — FAA-H-8083-16B
  5. AFH ch. 13 (p. 13-29) — FAA-H-8083-3C
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