Instrument Panel Installations; Figure 4-6 Example Of Pilot Field-Of-View Installation - Garmin GI 275 Installation Manual

4.4 Instrument Panel Installations

The GI 275 is primarily designed to replace existing 3-inch diameter flight instruments on the instrument
panel. For all GI 275 installations, the instrument panel must be constructed from metallic materials.
The GI 275 must be electrically bonded to the aircraft instrument panel with a direct current (DC)
resistance specified in Table 4-1. Electrical bond is accomplished through GI 275 surface to backside of
instrument panel surface contact.
The GI 275 display(s) must be located such that it is within the pilot's field-of-view and also within reach
of the pilot. The GI 275 display(s) must not interfere with the installation of flight control systems or
control lock devices.
FAA AC 23.1311 defines the pilot's field-of-view as the ability to view the flight instruments with
"minimum head and eye movement". Figure 4-6 provides an example of the pilot's field-of-view based on
a distance of 30 inches from the pilot eye to the instrument panel, as recommended in AC 23.1311.
UP
PRIMARY FIELD-OF-VIEW
15°
DOWN
PER AC23.1311-1C , PRIMARY FIELD-OF-VIEW IS BASED ON THE VERTICAL AND HORIZONTAL VISUAL FIELDS
FROM DESIGN EYE REFERENCE POINT THAT CAN BE ACCOMMODATED WITH EYE ROTATION ONLY.THIS
AREA IS NORMALLY RESERVED FOR PRIMARY FLIGHT INFORMATION AND HIGH PRIORITY ALERTS, E.G. GI
275 PRIMARY ADI, GI 275 HSI AND EIS ANNUNCIATOR (IF INSTALLED).
PER AC23.1311-1C PRIMARY MAXIMUM FIELD-OF-VIEW IS BASED ON THE VERTICAL AND HORIZONTAL VISUAL
FIELDS FROM DESIGN EYE REFERENCE POINT THAT CAN BE ACCOMMODATED WITH EYE ROTATION AND
MINIMAL HEAD ROTATION. THESE AREAS IS NORMALLY USED FOR IMPORTANT AND FREQUENTLY USED
INFORMATION, E.G. GI 275 STANDBY, GI 275 MFD AND GI 275 EIS.

Figure 4-6 Example of Pilot Field-of-View Installation

NOTE
Display location must not affect the readability of any existing or added switches under all
lighting conditions, including switches that maybe blocked from the instrument flood lights.
In Figure 4-6, the pilot's field-of-view centerline is coincident with:
1. A projection of the centerline of the pilot's seat onto the instrument panel; or
2. The center of control yoke or stick in neutral position if the control yoke or stick are offset from
the centerline of the pilot's seat.
3. Per AC 23.1311, it is acceptable for the pilot field-of-view centerline to deviate horizontally from
the actual centerline by ±2.0 inches.
190-02246-10
Rev. 11
40°
HORIZONTAL
15°
NORMAL 0°
20°
30.0
LEFT
35°
15°
RIGHT
GI 275 Part 23 AML STC Installation Manual
21.0 MAX
8.0 MAX
PILOT
FIELD-OF-VIEW
CENTERLINE
8.0 MAX
21.0 MAX
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