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AA.I.B.K2dFAA-S-ACS-11A · Nov 2023Knowledge

d. Cruise performance (e.g., optimum and maximum operating altitudes)

ACS element text (the applicant demonstrates understanding of)

How to determine the following, as applicable to the class sought: d. Cruise performance (e.g., optimum and maximum operating altitudes)

Bottom line

Calculate oxygen requirements, airspeeds, groundspeeds, time en route, and fuel burn using the AFM and weather data, when applicable.

Key numbers

Key numbers for d. Cruise performance (e.g., optimum and maximum operating altitudes)
NumberWhat it means
sufficient margin for maneuvering and gusts at selected max cruising altitudeBuffet margin
monitor throughout entire climb and cruise above 25,000 ft MSLCabin pressurization
required for pressurized airplanes with service ceiling or max operating altitude above 25,000 ft MSLHigh-altitude training

FAA references

  1. AC 61-107, para. 2-12, 3-2 — AC No: 61-107B
  2. AC 61-107, para. 1-7 — AC No: 61-107B
  3. AC 61-138, paras. 14.1.1.1, 14.1.1.2 — AC No: 61-138A
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