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AIM — FAA OPERATIONAL GUIDANCE

7-2-1 General

AIM Chapter 7. Safety of Flight — Section 7-2, Barometric Altimeter Errors and Setting Procedures

Official text — AIM 7-2-1

AIM — FAA OPERATIONAL GUIDANCE

a. Aircraft altimeters are subject to the following errors and weather factors:

1. Instrument error.

2. Position error from aircraft static pressure systems.

3. Nonstandard atmospheric pressure.

4. Nonstandard temperatures.

b. The standard altimeter 29.92 inches Mercury (“Hg.) setting at the higher altitudes eliminates station barometer errors, some altimeter instrument errors, and errors caused by altimeter settings derived from different geographical sources.

Reproduced from the FAA Aeronautical Information Manual (Basic (with Change 3)). The AIM is FAA guidance, not regulation. Verify against the official source before relying on it operationally.

Is this a regulation?

No — this is FAA guidance, not a regulation.

Aeronautical Information Manual. FAA operational guidance and recommended practices. The AIM is not regulatory, although it often explains how to comply with regulations.

SkeyeMentor FAA Library is an educational reference and study aid. Regulatory and FAA materials can change. SkeyeMentor provides links and contextual explanations to help pilots study, but users should verify current requirements through official FAA, eCFR and other applicable government sources before relying on them operationally. SkeyeMentor explanations are educational and are not legal advice.