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AA.I.D.R1FAA-S-ACS-11A · Nov 2023Risk management

Managing the airplane’s energy state.

ACS element text (the applicant demonstrates understanding of)

Managing the airplane’s energy state.

Bottom line

If there is a deviation from the desired altitude/distance target, the energy state needs to be adjusted. Conversely, if lower than planned in descent, raising the nose to decrease speed will reduce descent angle until back on the desired path. If speed adjustment is not an option, power can be added to correct a low-energy state, or the speed brakes used to correct a highenergy state.

FAA references

  1. AC 61-138, para. 17.1.2.2 — AC No: 61-138A
  2. AFH ch. 16 (p. 16-18) — FAA-H-8083-3C
  3. AFH ch. 5, Slow Flight (p. 5-10) — FAA-H-8083-3C
  4. AFH ch. 16 (p. 16-6) — FAA-H-8083-3C
  5. PHAK ch. 11 (p. 11-6) — FAA-H-8083-25C (2023)
  6. AFH ch. 5, Stall Recognition (p. 5-13) — FAA-H-8083-3C
  7. AC 61-138, para. 14.1.3.2 — AC No: 61-138A
  8. AC 120-111 Appendix 1 — AC No: 120-111
  9. PHAK ch. 5 (p. 5-27) — FAA-H-8083-25C (2023)
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