AMTStandards.orgAviation maintenance

Absolute pressure

Equal to gauge pressure plus atmospheric pressure. Also known as psia.

Aviation Maintenance Technician Handbook — General, p. G-1

Also defined in 3 more sources

Pressure measured from zero pressure or a vacuum.

Aviation Maintenance Technician Handbook — Airframe, p. G-1

Pressure referenced from zero pressure or a vacuum.

Aviation Maintenance Technician Handbook — Powerplant, p. G-1

Pressure measured from the reference of zero pressure, or a vacuum. A.C. Alternating current.

Pilot's Handbook of Aeronautical Knowledge, p. G-1