Definition
On an Electronic Flight Display equipped with Unusual Attitude Recovery Protection, the blue segment is the colored band displayed along the bank pointer of the attitude indicator that marks the range of bank angles considered normal for flight. When the aircraft's bank exceeds this range and enters an unusual attitude, the display provides recovery cues to guide the pilot back into the blue segment.
Plain English
It's a blue band on the attitude indicator that shows the safe range of bank angles. As long as the bank pointer stays inside the blue, the airplane is banked normally. If it goes outside the blue, the airplane is in an unusual attitude and the display will show you how to recover.
Context Anchor
Seen on electronic attitude displays and primary flight displays during attitude reference and unusual attitude recovery.
Why Pilots Care
Provides an immediate visual cue for aircraft orientation when outside references are lost.
Grounding Statement
If the display shows blue above the horizon line, it is showing the sky side of the airplane’s attitude picture.
Intuition Check
Do not read “blue segment” as just a decorative blue area. In this context, it is a flight-display cue: blue means the sky side of the attitude picture.
Example Sentence 1
After the autopilot disconnect, the bank pointer drifted outside the blue segment, signaling an unusual attitude.
Example Sentence 2
With the nose low, the blue segment appeared above the horizon line on the attitude indicator.