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AA.IV.B.R4FAA-S-ACS-11A · Nov 2023Risk management

Interpreting flight instruments.

ACS element text (the applicant demonstrates understanding of)

Interpreting flight instruments.

Bottom line

For those attitude indicators that display only pitch information of +/- 25° vertically, the instrument could "peg" (stop) and remain at this pitch indication until the pitch no longer exceeds limitation or "tumble" and provide erroneous pitch and bank indications when the aircraft exceeds these limits. A pilot can reduce susceptibility to disorienting illusions through training and awareness and learning to rely totally on flight instruments.

FAA references

  1. IFH ch. 7 (pp. 7-26–7-27) — FAA-H-8083-15B
  2. PHAK ch. 8 (p. 8-19) — FAA-H-8083-25C (2023)
  3. AC 120-111 Appendix 1 — AC No: 120-111
  4. AC 120-111, para. 3-3 — AC No: 120-111
  5. PHAK ch. 17 (p. 17-6) — FAA-H-8083-25C (2023)
  6. RMH ch. 3 (p. 3-6) — FAA-H-8083-2A
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