Definition
A method of nondestructive inspection in which a technician operates the test equipment by hand, moving the probe or sensor across the part being inspected and interpreting the results directly, rather than relying on automated scanning systems.
Plain English
Checking a part for hidden flaws by hand, with the inspector physically guiding the test tool over the surface and reading the results as they go.
Context Anchor
Seen in aircraft maintenance, preflight checks, system troubleshooting, and inspection procedures.
Derivation
From Latin manualis, meaning 'of the hand.' The word emphasizes that the testing is done by a person operating the equipment directly, as opposed to a machine running the test on its own.
Why Pilots Care
Manual testing is how many critical inspections actually get done on aircraft. The quality of the inspection depends heavily on the skill and attention of the technician performing it, which is why proper training and certification of inspectors matters for airworthiness.
Intuition Check
Manual testing does not mean testing a maintenance manual. It means a person performs the check directly, by hand or by normal control operation.
Example Sentence 1
The technician performed manual testing on the wing spar using an ultrasonic probe to check for internal cracks.
Example Sentence 2
Before flight the crew carried out manual testing of the hydraulic pumps to verify pressure buildup and response.