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
Indicates height above ground level (AGL).
(2) Bug & Control
Rotated to position bug to selected height
(3) Test Switch
Drives altitude pointer to 40 ft and DH light will illuminate.
(4) DH Light
Illuminated if airplane is at or below selected height.
