Definition
The outer housing that encloses the compressor section of a turbine engine. It supports the stator vanes, contains the rotating compressor stages, and forms the outer boundary of the airflow path as air is progressively compressed before entering the combustion section.
Plain English
The metal shell wrapped around the spinning blades and fixed vanes that squeeze air at the front of a jet engine. It holds those parts in place and keeps the air moving through them in the right path.
Context Anchor
Seen in turbine engine descriptions, maintenance manuals, inspection reports, and discussions of engine section damage.
Derivation
Compressor comes from a Latin root meaning “to press together.” Case means an outer covering or container. Together, the words point to the covering around the engine part that presses air into a smaller, higher-pressure flow.
Why Pilots Care
The compressor case must remain intact to contain high internal pressures; cracks or distortion can lead to engine inefficiency or failure.
Analogy
Think of it like the outer shell of a pump: the moving and fixed parts inside do the work, but the shell keeps everything aligned and contains the path the air must follow.
Intuition Check
Do not read “case” here as a general situation or paperwork file. In this term, “case” means the physical outer housing of the compressor section.
Example Sentence 1
During the inspection, the technician checked the compressor case for cracks around the mounting flanges.
Example Sentence 2
During the borescope check, the technician looked for cracks along the inside surface of the compressor case.