Definition
The standard instrument scanning technique in which the pilot's eyes move continuously and systematically across the flight instruments, observing each one briefly and returning frequently to the primary instrument for the current flight condition, so that any deviation is detected and corrected promptly.
Plain English
It is the steady, repeating eye-scan pattern a pilot uses to look across all the cockpit instruments, checking each one for a moment and coming back to the most important one often, so nothing is missed.
Context Anchor
Used during instrument flight, especially after a change such as adjusting power in straight-and-level flight, when the pilot returns to the usual instrument scan to confirm the airplane has settled where intended.
Derivation
‘Cross-check’ comes from the idea of checking one source against another to confirm accuracy. In instrument flying, the pilot cross-checks several instruments against each other rather than trusting any single one, because instruments can fail or mislead.
Why Pilots Care
A proper normal cross-check prevents loss of control by ensuring continuous, accurate information from multiple instruments rather than relying on one.
Intuition Check
“Normal” does not mean casual or occasional here. It means the standard scan pattern the pilot uses when nothing unusual is happening. “Cross-check” does not mean one quick glance; it means comparing several instruments to confirm the airplane’s actual performance.
Example Sentence 1
During straight-and-level flight, the pilot maintained a normal cross-check, glancing briefly at each instrument and returning often to the attitude indicator.
Example Sentence 2
During the climb, she kept a normal cross-check between the attitude indicator, altimeter, and vertical speed indicator.