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AA.I.E.R4FAA-S-ACS-11A · Nov 2023Risk management

Loss of cabin pressure.

ACS element text (the applicant demonstrates understanding of)

Loss of cabin pressure.

Bottom line

Warning indication to the flightcrew when the safe or preset pressure differential or cabin pressure altitude limit is exceeded.

FAA references

  1. 14 CFR 25.841 (Pressurized cabins.) — eCFR current as of 2026-10-08
  2. AC 61-138, para. 14.3.1.2 — AC No: 61-138A
  3. 14 CFR 121.333 (Supplemental oxygen for emergency descent and for first aid; turbine engine powered airplanes with pressurized cabins.) — eCFR current as of 2026-10-01
  4. 14 CFR 121.329 (Supplemental oxygen for sustenance: Turbine engine powered airplanes.) — eCFR current as of 2026-10-01
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