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under the operational mode.
a. Pilot programming — Switch set to P-PGM.
b. Copilot programming — Switch set to CP-PGM.
c. Operation (flight mode) — Switch set to OP. (Adjust
— ADJ/ON/OFF switch to ADJ).
4-1-31. Display Modes.
Symbology display modes are programmable by the pilot
and copilot via the converter control unit located on the
console. Modes are defined by selecting from a master
symbology menu (fig. 4-1-9). Up to eight (8) display
modes, four normal and four declutter can be programmed
for each user and can be selected for display
using the display mode selection switch on the pilot or
copilot thrust control lever or on the CCU. The default
declutter mode has a minimum symbology display of:
Airspeed - No. 25
Altitude (MSL) - No. 7
Attitude (pitch and roll) - Nos. 5, 6, 20, 26
Engine Torque(s) - No. 22, 23
Figure 4-1-9. CH-47D HUD Master Mode Symbology Display (Sheet 1 of 3)
TM 1-1520-240-10
Change 20 4-1-21
No. Symbol Source Range/Description
1 Angle of Pitch Scale HUD System 30 (10 units, tic marks flash when angle of pitch is
30)
2 Bearing to Waypoint -
Pointer
Doppler 0 - 359 (cursor will invert “V” when aircraft is moving away
from the waypoint)
3 Compass Reference
Scale
HUD System 0 - 359 (10 units)
4 Aircraft Heading Fix
Index
HUD System Fixed Reference Mark
5 Angle of Roll - Pointer Vertical Gyro, Copilot
30 (right turn moves pointer to right, pointer flashes
30)
6 Angle of Roll - Scale HUD System 30 (10 units)
7 Barometric Altitude
(MSl)
Air Data Transducer
-1500 to 20,000 feet (set during adjustment mode)
8 Adjust/Program Mode
Message
HUD System ADJ or PROG
9 OK/FAIL HUD System OK or FAIL
10 Velocity Vector Doppler 0 - 15 knots/15 kilometers, 0-359
11 Rate of Climb Pointer Air Data Transducer
2000 feet-per-minute (used with vertical speed scale, No.
15)
12 Radar Altitude (AGL) -
Numeric
Radar Altimeter,
Pilot
0 - 1000 feet (0 - 200 feet, 1 foot units; 200 -1000 feet, 10
feet units; disappears above 999 feet, and reappears below
950 feet)
13 Minimum Altitude
Warning
Radar Altimeter,
Pilot
Blinking square around symbol - No. 12, set on pilot’s radar
altimeter (use low set index)
14 Radar Altitude (AGL)
Analog Bar
Radar Altimeter,
Pilot
0 - 200 feet (disappears at 250 feet, reappears at 225 feet;
digital readout symbol, No. 12)
15 AGL Vertical Speed -
Scale
HUD System 0 -200 feet/2000 feet-per-minute
16 HUD Fail Message HUD System CPM, SDR, SDA, PS, PDU, CPDU, NAV, PGM; can be
cleared from the display by selecting “ACK” (See NOTE)
17 Trim (Slide Ball) Inclinometer 2 balls (left/right)
18 MST, MEM, HOOK
Messages
Master Caution
Panel
MST, MEM, HOOK; cannot be cleared from the display by
selecting “ACK”
NOTE: After ACK is used to acknowledge a fault, the fault will not reappear until BIT is selected or power is cycled
off and on.
Figure 4-1-9. CH-47D HUD Master Mode Symbology Display (Sheet 2 of 3)
TM 1-1520-240-10
4-1-22
No. Symbol Source Range/Description
19 Sensor, Fire Warnings Light Plate Ass’y
Cockpit
ATT (failure of copilot VGI), MSL, IAS, FIRE; ATT, MSL, and
IAS can be cleared from display by selecting “ACK” (See
NOTE). FIRE cannot be cleared.
20 Horizon Line (pitch,
roll)
Vertical Gyro, Copilot
Pitch: 30 Roll: 0 - 359
21 Display Mode Number HUD System 1N - 4N for normal modes, 1D - 4D for declutter modes
22 Torque Limits Torque Transducer
(> 100%, solid box) (>123%, thresholds, solid box
flashes)
23 Torque - Numerics Torque Transducer
0 - 130% (flashes when engine torque separation is greater
than 5% threshold) Max % torque split between cockpit panel
and HUD is 3%
24 Ground Speed Doppler 0 - 999 knots/ 0 -530 km/h (dependent on doppler)
25 Indicated Airspeed Air Data Transducer
0 - 220 knots (no symbol 00 knots and below, reappears at
02 knots)
26 Attitude Reference Indicator
HUD System Represents helicopter
27 Engines Temperature Thermocouple
Amplifiers
0 - 999C (0 - 755C, 2units; 776C - 999C, 1units) Max
split between cockpit and HUD is 15
28 Distance to Waypoint Doppler 0 - 999.9 km
29 Bearing to Waypoint -
Numeric
Doppler 0 - 359
NOTE: After ACK is used to acknowledge a fault, the fault will not reappear until BIT is selected or power is cycled
off and on.
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