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AA.I.B.R3FAA-S-ACS-11A · Nov 2023Risk management

Possible differences between calculated performance and actual performance.

ACS element text (the applicant demonstrates understanding of)

Possible differences between calculated performance and actual performance.

Bottom line

Issues with aircraft performance and handling qualities may indicate that the aircraft weight or balance is not accurate. There is no rule-of-thumb or chart to compute the effects of humidity on density altitude, but humidity must be taken into consideration, and overall performance should be expected to decrease in high humidity conditions.

FAA references

  1. PHAK ch. 11 (p. 11-28) — FAA-H-8083-25C (2023)
  2. AC 20-117, para. 4a — AC No: 20-117
  3. AIH ch. 1 (pp. 1-20–1-21) — FAA-H-8083-9B
  4. AC 120-27, para. 4.1.1 — AC No: 120-27F
  5. AC 20-117, paras. 4f, 4g — AC No: 20-117
  6. PHAK ch. 11 (p. 11-5) — FAA-H-8083-25C (2023)
  7. AC 61-107, para. 2-12 — AC No: 61-107B
  8. PHAK ch. 16 (p. 16-21) — FAA-H-8083-25C (2023)
  9. AFH ch. 16 (p. 16-20) — FAA-H-8083-3C
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