EAWS H-60 SPECIFIC 203 AVIONICS/ELECTRICAL SYSTEM Flashcards

Terms Definitions
203.1.1 State the purpose of the following communication system: Very High Frequency (VHF)/Ultra High Frequency (UHF) radio set
( VHF 30-300 MHz) (UHF 300 - 3000 MHz). Two-way clear or secure V/UHF between the helicopter and other stations. (ARC-182 and KY-58)
203.1.1 State the purpose of the following communication system: High Frequency (HF) radio set
Two-way clear or secure over-the-horizon HF between the helicopter and other stations. (ARC-174).
203.1.1 State the purpose of the following communication system: Intercommunication System (ICS)
Permits communication between the aircrew.
203.1.2 State the purpose of the following primary navigation system: Tactical Air Navigation (TACAN)
Receives a UHF signal from a TACAN surface station or aircraft and calculates the magnetic bearing and slant range to that station. Range is limited to line-of-sight and increases with aircraft altitude, up to 123 nautical miles at 10,000 feet.
203.1.2 State the purpose of the following primary navigation system: Global Positioning System (GPS)
Primary source of position, velocity and time. Position and velocity updates from GPS are received once a second.
203.1.2 State the purpose of the following primary navigation system: Compass
Consist of two(2) displacement gyroscopes, two ML-1 remote compass transmitters, two ECA’s. Each independent system provides pilot with pitch and roll attitude information, viewed on attitude indicator and yaw (heading) information displayed on HSVD in cockpit.
203.1.2 State the purpose of the following primary navigation system: Doppler Navigation Set
Ground speed sensor for the main backup tactical navigation system. Provides three axis velocities that are used to compute ground speed. Aircraft heading, drift and vertical velocities are calculated.
203.1.3 State the purpose of the Automatic Flight Control System (AFCS).
An electrohydromechanical system which provides inputs to the flight control system to assist the pilot in maneuvering and handling the helicopter.
203.1.4 State the purpose of the following tactical system: Tactical Navigation
Provides the Navigation systems with bearing and distance information from a selected TACAN station. Supplies station identity audio output to CSC and Bi-directional suppression capability for use with the IFF transponder.
203.1.4 State the purpose of the following tactical system: Identification Friend or Foe (IFF)
Responds to interrogation from other units. 5 modes of operation. For long range automatic enemy identification.
203.1.4 State the purpose of the following tactical system: Mission Data Loader (MDL)
Consist of an interface receptacle unit and a data transfer module(cartridge). Cartridge contains waypoints, a reversionary waypoint database, flight plan sets, magnetic variation table and GPS almanac data.
203.1.4 State the purpose of the following tactical system: Downed Aviator Locator System (DALS)
An airborne electronic set designed to quickly and precisely locate downed aircrew survivors equipped with a survival radio AN/PRC-112. Calculates range and steering information to the survivor.
203.1.4 State the purpose of the following tactical system: Heads Up Display (HUD)
Serves as an aid to pilots using the AN/AVS-6 (anvis) during night flight operations by providing operational symbology information about the aircraft.
203.1.4 State the purpose of the following tactical system: Sonar Detecting-Ranging Set (AN/AQ5-13F)
The sonar set is used as either a variable depth active/passive or an acoustic processor for display of passive/active sonobuoy information.
203.1.5 State the purpose of the following survivability system: Radar warning
Detects radar tracking (high-band) and missile guidance (low-band) signals which may represent a repeat to the helicopter. Provides visual directional indication of the source of a tracking signal, indicates when a tracking radar has locked onto the helicopter, and indicates the presence of low-band signals used for missile guidance.
203.1.5 State the purpose of the following survivability system: Missile warning (AN/AAR-47)
An electronic counter measure unit designed to protect helicopters and low, slow flying aircrafts against surface to air and air to air missiles. Detects missile fired at the aircraft and sends signal to countermeasure dispenser set (CHAFF).
203.1.5 State the purpose of the following survivability system: Laser warning (AN/.AVR-2)
A frequency extension of the radar detecting set. Detects and displays to aircraft pilot information concerning the environment around the aircraft, improving aircraft survivability.
203.1.5 State the purpose of the following survivability system: Countermeasures
Used to dispense countermeasure materials (metallic chaff, flares, and jammers). The ejected countermeasure materials deceive enemy radars and infrared sensors, which enables the aircraft to evade air to air and surface to air attacks.
203.1.6 State the purpose of the following flight instrument: Horizontal Situation Video Display (HSVD)
Primary flight instruments which presents a plain view of the navigation situation. Operates in two modes HSI and HVR.
203.1.6 State the purpose of the following flight instrument: Attitude Indicator (AI)
Provide a visual display of aircraft attitude (pitch and roll). Also provides slip/skip indicator and rate of turn indicator.
203.1.6 State the purpose of the following flight instrument: Radar altimeter (AN/PRN-194)
Electronic altimeter is a range-tracking radar. It provides continuous measurements of height above land or water. Range of 0 to 5,000 ft with an accuracy of +/- 3ft. Only a range of 0 to 1,000ft is indicated on instrument.
203.1.6 State the purpose of the following flight instrument: Barometric altimeter (Altimeter/Encoder)
Functions as a barometric altimeter and a pressure altitude sensor. Pilot’s encoder sends signals to IFF system and co-pilot’s encoder sends signal to GPS. Operating range is from -1,000 to +50,000ft.
203.1.6 State the purpose of the following flight instrument: Vertical Speed Indicator (VSI)
Indicates vertical speed in thousands of feet per minute. First one thousand feet is marked in one hundred foot increments.
203.1.6 State the purpose of the following flight instrument: Airspeed Indicator (AI)
Differential pressure instrument, measuring the difference between pitot and static pressure.
203.1.7 State the location of the position lights.
Port stub wing - red light

Starboard stub wing - green light

Aft end tail pylon - white light
203.1.7 State the purpose of the position lights.
Functions as a navigational aid:
Aboard ship, the position light functions as communication aid between pilot and LSE. Flashing to engage rotor, steady to launch aircraft.
203.1.7 State the purpose/location of the anti-collision lights.
Functions as a navigational aid and to prevent midair collisions. One on top of tail pylon, one on bottom of tail cone. Each light has red (night) and clear (day) lens.
203.1.8 Discuss the function of the following electrical power system component: AC Generators: Main
Oil cooled, brushless generators driven by accessory section. Provides ac electrical power to aircraft, rated at 30/45kva, 400Hz at 115/200vac.
203.1.8 Discuss the function of the following electrical power system component: AC Generators: APU generator
Air cooled, brushless generators driven by the Auxiliary Power Unit. It is rated at 20/30kva, 400Hz, at 115/200vac.
203.1.8 Discuss the function of the following electrical power system component: Generator Control Unit (GCU)
Monitors and regulates each generator output. Provides over and under voltage protection, feeder fault protection, and under frequency protection. Under frequency protection is disabled in flight.
203.1.9 Briefly describe and state the purpose of the following ASW system component: Transducer
Consists of five major assemblies:
(1) Nose assembly
(2) Transmitter assembly
(3) Projector/hydrophone assembly
(4) Electronic assembly
(5) Tail assembly
Bottom of nose assembly encloses the storage battery that furnishes power to transmitter assembly. Battery consists of 72 rechargeable lead acid cells arranged in a circular pattern.
203.1.9 Briefly describe and state the purpose of the following ASW system component: Reeling machine
A hydraulic hoist that raises and lowers the transducer. Operates at 3000psi from the utility hydraulic system.
203.1.9 Briefly describe and state the purpose of the following ASW system component: Azimuth and range indicator
(1) Control all primary power to the sonar
(2) Supplies low voltage power to the receiver
(3) Displays target bearing and range information
(4) Provides target range rate (doppler) readout.
203.1.9 Briefly describe and state the purpose of the following ASW system component: Sonobuoy receiver
(1) Provides timing for the entire sonar set
(2) Generates transmit signals to the transducer
(3) Reformats the demodulated hydrophone sonic signals from the multiplexer for display on the ARI.
(4) Displays cursor selected target bearing and range.
203.1.9 Briefly describe and state the purpose of the following ASW system component: Sonar data computer
A programmable digital processor that provides:
(1) Spectral analysis of passive or active sonobuoys
(2) Adaptive processor - sonar for enhance sonar capabilities.
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