Flight Instruments

VERTICAL SPEED INDICATOR

Indicates airplane rate of climb or descent.

(1) Vertical Speed Scale

Indicates vertical speed in feet per minuate x 1000.
Scale is 0 to 6000 fpm.

(2) Vertical Speed Pointer

An accelerometer is incorporated to provide instantaneous reading.
Positioned by vertical accelerometer and rate of static pressure change.

PNEUMATIC ALTIMETER

Indicates airplane altitude above reference pressure.

(1) Altitude Window

Indicates vertical speed in feet per minuate x 1000.
Scale is 0 to 6000 fpm.

(2) Millibars Window

Displays barometric setting in millibars as manually set with the BARO set knob

(3) Inches Of Mercury Window

Displays barometric setting in inches of mercury as manually set with the BARO set knob

(4) Barometric Set Knob

An accelerometer is incorporated to provide instantaneous reading.
Positioned by vertical accelerometer and rate of static pressure change.

(5) 100-Foot Pointer

Indicates feet on radial dial. Each mark is 20 ft, each digit is 100 ft.

(6) Inner Altitude Bug

Manually positioned by altitude bug set knob.

PNEUMATIC AIRSPEED INDICATOR

Indicates airplane airspeed in knots and mach.

(1) Indicated Airspeed Pointer

Pointer indicates 0-200 KIAS on outer scale; 200-400 KIAS on inner scale.
Pointer indicates Mach on window scale.

(2) Inner Airspeed bug

Reference speed for autothrottle.
Manually positioned by (4).

(3) Airspeed Bugs

Three manually positioned reference bugs (on outer ring).

(4) Airspeed Bug Set Knob

Turned to position inner airspeed bug.

(5) Max Operating Speed Pointer

Indicates the max operating speed (Vmo) for existing altitude.

SAT/TAS INDICATOR

Indicates airplane standard air temperature and true airspeed

(1) Static Air Temperature Indicator

Indicates static air temperature.

(2) True Airspeed Indicator

Indicates true airspeed.

RADIO MAGNETIC INDICATOR

Combines a magnetic compass with navigation signals from VORs and NDBs to provide bearing information to the selected station.

(1) No. 1 VOR/ADF Selector

When turned to the left (vertical), selects No. 1 VOR information to the No. 1 VOR/ADF Pointer.
When turned to the right (horizontal), selects No. 1 ADF information to the No. 1 VOR/ADF pointer.

(2) No. 2 VOR/ADF Selector

When turned to the left (vertical), selects No. 2 VOR information to the No. 2 VOR/ADF Pointer.
When turned to the right (horizontal), selects No. 2 ADF information to the No. 2 VOR/ADF pointer.

(3) No. 1 & 2 VOR/ADF pointer

Points towards the selected station based on the given source from (1) & (2).

HORIZONTAL SITUATION INDICATOR

Integrates the directional gyro, course deviation indicator, and glide slope to provide comprehensive display of flight path relative to a chosen navigation source.

(1) Miles Window

Displays associated DME distance.

(2) Course Window

Displays course selected by pilot.

(3) Glideslope Scale & Deviation Pointer

In conjunction with deviation pointer indicates vertical deviation above or below the glideslope.
Each mark indicates 1/4-degree.
Vertical deviation pointer out of view with VOR selected.

(4) To-From Indicator

Points toward a line through the VOR station perpendicular to the seleccted course.

(5) Heading Bug

Indicates heading selected by pilot.

(6) Course Deviation Bar & Scale

As a reference on the course deviation scale, indicates deviation from the selected course.
Each dot equals 5-degrees on VOR and 1 1/4-degrees on LOC.

(7) Heading Control

Rotated to set heading bug.

(8) Course Control

Rotated to set course indicator.

ATTITUDE DIRECTION INDICATOR

Provides information about the orientation of the aircraft relative to the horizon.

(1) Go-Around Light

Illuminates to indicate flight director go-around mode.

(2) Bank Angle Scale

Displays roll attitude as indicated by roll index (4).

(3) Max Bank Angle

Displays the maximum allowed bank angle.

(4) Roll Index

Indicates roll attitude on bank angle scale (2).

(5) Pitch Scale

Displays pitch attitude in reference to airplane symbol.

(6) Fast-Slow Indicator

Indicates airpseed deviation fast (F) or slow (S).
References to the captain's inner airspeed bug.

(7) Glideslope Deviation Scale & Pointer

Indicates deviation from center of glideslope beam.

(8) Expanded Localizer Indicator

Lateral movement from center line indicates displacement from localizer.

(9) Test Switch

Push-to-test switch checks the indicator's amplifiers and servos.

(10) Slip Indicator

Skid ball indicates amount of yaw.

INSTRUMENT COMPARATOR

Compares data outputs of flight instruments and displays an appropriate warning when the captain's and first officer's instruments disagree.

(1) Monitor Power Light

Illuminates at loss of electrical power to the comparator.

(2) Heading Light

Indicates a heading difference of 6 degrees between HSIs.

(3) Horizon Pitch Light

Indicates a difference of 4 to 6 degrees in pitch between ADIs.

(4) Roll Pitch Light

Indicates a difference of 4 to 6 degrees in roll between ADIs.

(5) Glideslope Light

Both nav receivers mus be tuned to an active localizer freuqnecy; GS flags not in view.
On at 3/4 to 1-dot difference on HSIs.

(6) Localizer Light

Indicates heading selected by pilot.

(7) Radio Altimeter Light

Indicates a difference between RAs of
- 55 ft at 1500 ft
- 25 ft at 200 ft
- 5 ft at touchdown.

RADIO ALTIMETER INDICATOR

Provides a visual display of airplane terrain clearance, from 0 to 2500 ft. A light will warn the crew that the airplane is at or below the selected altitude.

(1) Altitude Pointer