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tail wheel fork. Towing the helicopter must be accomplished
by trained personnel in accordance with
instructions in TM 1-1520-238-23.
2.58 CANOPY AND WINDSHIELD CLEANING.
Do not attempt to clean either the
PNVS or TADS turret windows or optics.
These require special treatment
by trained personnel.
The canopy and windshield shall be carefully cleaned,
using aircraft cleaning practices, with clear water and
a moist chamois or flannel cloth.
2.59 MOORING.
The helicopter is moored in accordance with TM
1-1500-250-23.
Figure 2-46. Ground Air Source
2-96
TM 1-1520-238-10
Change 6 2-97
M01--127--1A
MOORING
LUG
(2 PLACES)
IN FLIGHT
MUZZLE COVER
ENGINE EXHAUST
PROTECTIVE SHIELDS
(TYPICAL 6 PLACES)
AFT
FUSELAGE
TIEDOWN
APERTURE
COVER
APU EXHAUST
PROTECTIVE SHIELD
UPPER LOUVER
ENGINE NACELLE
PROTECTIVE COVERS
(TYPICAL 2 PLACES)
ENCU EXHAUST
PROTECTIVE COVER
TURRET
FAIRING
AREA WEAPON
AND TURRET
PROTECTIVE
COVER
TADS/PNVS
PROTECTIVE COVER
LEFT
FUSELAGE
STEP
Figure 2-47. Protective Covers, Mooring, Towing (Sheet 1 of 2)
TM 1-1520-238-10
2-98 Change 6
M01--127--2A
NOSE GEARBOX
COOLING AIR
INLET PROTECTIVE
SHIELD
ENGINE AIR
INLET PROTECTIVE
SHIELD
PITOT HEAD
PROTECTIVE COVER
TADS/PNVS
COVER
CHAFF DISPENSER & COVER
(OPTIONAL EQUIP)
TOW BAR
SAFETY PINS
POUCH
RED
STREAMER
MAIN ROTOR BLADE
TIE--DOWN
POLE ASSEMBLY
MAIN ROTOR APERTURE
PROTECTIVE COVER
AFT
FUSELAGE
TIEDOWN
CANOPY
PROTECTIVE
COVER
MAIN ROTOR BLADE
TIE--DOWN ASSEMBLY
OMNIDIRECTIONAL
AIRSPEED/PROTECTIVE
COVER
Figure 2-47. Protective Covers, Mooring, Towing (Sheet 2 of 2)
TM 1-1520-238-10
CHAPTER 3
AVIONICS
Section 1. GENERAL
3.1 DESCRIPTION. item. Antenna locations on the airframe are shown (fig
3-1).
This chapter covers the avionics equipment configura- 3.2 AVIONICS EQUIPMENT CONFIGURATIONS.
tion installed in the AH-64A helicopter. It includes a
brief description of the avionics equipment, its techni- Avionics equipment configurations are shown in Table
cal characteristics, capabilities, and locations. For mis- 3-1.
sion avionics equipment, refer to Chapter 4, Mission
Equipment. 3.3 AVIONICS POWER SUPPLY.
The communications equipment provides intercommunication
between crewmembers and VHF AM-FM and
UHF AM radio communication. If installed, VHF FM
Single Channel Ground and Airborne Radio Set (SINCGARS)
is also provided. The navigation equipment includes
an Automatic Direction Finder (ADF), a Doppler
Navigation System (DNS) and a Heading Attitude Reference
Set (HARS). Transponder equipment consists of
an Identification Friend or Foe (IFF) receiver transmitter.
Height above ground level is provided by a radar altimeter.
Each antenna is described with its major end
Power to operate most of the avionics equipment is provided
by the emergency dc bus. This allows for backup
battery power that is used in the event of a complete
electrical failure. External power may also be applied.
Function selector should be OFF before applying helicopter
power.
3.4 EMERGENCY OPERATION.
If both generators or both transformer-rectifiers (T/R’s)
fail, turn off all nonessential radio equipment to prevent
excessive drain on the battery.
3-1
TM 1-1520-238-10
Table 3-1. Communication/Navigation Equipment
Control
Equipment Nomenclature use Range Location Remarks
Intercommunication
VHF FM-AM
Communication
VHF FM-AM
Communication
VHF FM
Communication
(SINCGARS)
UHF AM
Communication
Remote Control Unit
(RCU) Voice Security
System
Intercommunication
Control
C-10414/ARC or
C-11746/ARC
Remote
Transmitter
Selector (used
with C-10414) or
Remote
Transmitter
Indicator
ID-2403/ARC
(used with
C-11746)
AN/ARC-186(V)
VHF FM-AM No.1
AN/ARC-186(V)
VHF FM-AM
No. 2
AN/ARC-201
AN/ARC-164
Z-AHP KY-58
Intercommunication
between crew
members and control
of navigation and
communication
radios.
Indicates control of
communication and
navigation
equipment.
Two-way FM voice
communications. FM
frequency range 30
to 87.975 MHz plus
　
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