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91 Cards in this Set
- Front
- Back
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Near the equator, the lines of magnetic force are
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parallel to the earth's surface
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Which magnetic compass error occurs due to magnetisim within the aircraft?
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Deviation
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The magnitude of the coriolis error signal depends on the aircraft speed, aircraft heading,
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rotation of the earth, and geographic lattitude
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Neutralizing or weakening the permanent magnetic field that exists around an aircraft
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degaussing
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Any misalignment between the MAD and the longitudal axis of the aircraft creates
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an index error
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Which error is due primarily to an eletrical imbalance in the windings of the MAD?
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Transmission error
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With an input freq. of 400 Hz, what is the output freq. of the MAD?
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800Hz
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What is used to develop the single cycle error compensation signal in the AHRS system?
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Variable resistors
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What types of gyros are used in the AHRS system?
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one VG and one DG
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The source of the erection signal for the VG pitch gimbal of the AHRS system is
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a fluid type sensor
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the AHRS system DG pitch gimbal is aligned with and constantly follows the
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VG pitch gimbal
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The AHRS system requires input power consisting of 115-VAC, 400Hz, 3-phase aircraft power, and
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26 VAC, 400Hz, single phase power for excitation
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The AHRS cuts off slaving of the AHRS to magnetic heading when a fore-aft acceleration of
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0.055-g or a turn rate of 8' per minute is exceeded
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The three AHRS heading modes of operation are slave,
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DG, and compass.
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The MC-2000 electronics group consists of a control console, magnetic field monitor,
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turntable, and alignment tool kit.
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The serial number on the mc-2000 electronics group control console must match the serial number on the?
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magnetic field monitor.
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The telescope on the magnetic field monitor is
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22-power and rotates 360 degrees
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What is used only during the field certification and calibration check?
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Magnetic azimuth reference detector
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The navigation function is accomplished primarilty through the sensing and measurement of?
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acceleration
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The INS operates as a self contained system, but can be updated by?
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TACAN, SKE, or manually.
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Which INS unit serves as the communication link between the pilot and the INU digital computer?
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control display unit.
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Which INS control display unit light illuminates approx. two minutes before reaching a waypoint during flight?
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ALERT
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Which INS CDU right hand data display digits display an action code when there is a system failure?
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2 and 3
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Which INS submode enables aided inertial operation using TACAN data?
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4
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Which light indicates an operator error out of tolerence condition in the INS computer?
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WARN
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What is the maximum time a fully charged battery unit can sustain INS operation?
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30 minutes.
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The ATT switch position on the INS mode selector unit is used to select
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Only attitude signals.
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The INS mode selector unit BAT light illuminates if the battery unit
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is not charged enough to sustain INS operation.
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The most accurate inertial navigation system alignment is
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pure inertial
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In coarse level (state 8), the INS platform gimbals are alligned to
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local vertical
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What do GPS recievers have programmed into their computers telling the reciever continually where each satellite is located?
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Almanac
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The process of using fixed points and their bearings to isolate a position in space is called
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Triangulation
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The GPS is a worldwide radio-navigation system with ground sstions and a reciever, and is formed from a constellation of how many satellites?
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24
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How many GPS satellites are needed to establish our lateral and longitudal coordinates
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3
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How many GPS system satellites are needed to determine aircraft altitude?
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4
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The GPS satellites and recievers are synchronized to the nano-second by
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atomic clocks
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The FD/RGA dual integrated FD system is made up of dual FD's, dual AOA/RGA subsystems, and
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a comparitor warning montior
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The dual FD systems provide the pilot with displays of aircraft attitude, heading, and
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course
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What is shared by both RGA subsystems of the flight director system?
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a probe heater relay
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The pitch command control of the FDS selects a climb or descent angle from
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15' up to 10' down
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What flight director system's attitude director indicator warning flag indicates faulty command bar information?
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CMPTR
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What is displayed on the heading marker of the flight director system's HSI?
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Manually selected heading
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With the FDS's HSI rmote heading slew switch in the DUAL position, which HSI heading marker(s) move when the pilot's heading slew control is pressed?
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Pilot's and Co-pilot's
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What FDS component develops the lateral and vertical signals displayed on the ADI by the command bars?
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Steering computer
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In the AOA/RGA system, how many degrees of initial climbout are displayed on the ADI during takeoff with the flaps set at 30'?
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8'
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What does the RGA computer provide to the control unit to indicate the validity of the vertical steering signal?
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An interlock signal
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What AOA/RGA system component averages the AOA signals?
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RGA interface logic unit
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Which RGA interface logic unit test switch must be activated to allow go-around mode thesting on the ground?
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WOW TEST
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Which comparitor warning monitor subsystem indicator lights when a differental error of 3' pitch exists for more than two seconds between the two RGA computers
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RGA
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The four channels of the comparitor warning monitor compare the dual outputs of the compass, glideslope, localizer, and
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low-range altimiter systems.
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In what FD/RGA operating mode are the ADI's command bars driven out of view?
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GYRO
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In what FD/RGA mode does the roll steering computer use the heading error and bank attitude signals to compute lateral steering commands?
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HDG
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In the FD/RGA system, at what altitude is glideslope extention mode initiated?
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200
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In the FD/RGA system, what mode overrides the navigatyion lateral and glideslope beam sensors?
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APPR MAN
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Whic flight control surface position indicator displays percentage of surface extention?
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Flap
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What type of operating power is required by a selsyn position indicating system?
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28 VDC
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How many degrees apart are the wipers of a selsyn transmitter positioned?
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180'
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How accurately the selsyn position indicator rotor follows the transmitter depends upon the?
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spacing of the coils and taps.
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The vertical scale tach indicating system monitors the speed of which two engine compressors?
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N1 (low-speed), and N2 (High-speed)
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The tachometer generator most commonly used with the vertical scale RPM indicating system contains a?
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2 pole permanent magnet and a 3 phase stator
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N1 and N2 RPM tapes indicate a percentage of RPM from 0 to
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110
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Which device on the sensor driven N1 RPM indicator represents the maximum achieved RPM during an overspeed condition?
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N1 Maximum pointer
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The BIT is initiated by rotating a small screw on the front of the N! RPM indicator
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45' Clockwise
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the amount of current produced when the hot junction in the vertical scale exhaust gas temperature indicating system is heated dependant on the difference in temperature between the?
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Hot and cold junctions.
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The purpose of the cold junction compensator in the vertical scale exhaust gas temperature indicating system is to copensate for?
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changes in ambient temperature
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Which malfunction would cause an exhaust gas temperature indicator to read off scale high?
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Feedback signal from the indicator to the converter lost
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The fuel flow transmitter motor drives the impeller at a?
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constant 60 RPM
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On the vertical scale fuel flow indicator, each numbered increment is read as ?
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pounds per hour x 1000
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What type of mechanical sensing device is contained in the vertical scale analog EPR transducer?
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Dual Bellows.
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What positions the tape and moves the rotor of the control transformer in the EPR indicator?
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Geartrain
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Instead of using a dual bellowssensing element, thdigital EPR transducer uses a ?
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piezoresistive pressure sensing element.
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The only moving part in the oil presure indicator is the?
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rotor
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What indication is displayed on the oil pressure indicator when there is an open rotor lead in the transmitter?
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Inoperative
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What indication is displayed on the oil pressure indicator when the transmitter vent bourdon tube has a leak?
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High
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The torquemeter assembly consists of a torquemeter housing assy, torquemeter pickup assy, and?
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two concentric shaft assemblies.
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The torquemeter indicator displays torque value in?
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inch-pounds from -4,000 to 28,000
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Before you can callibrate the torquemeter indicating system, you must obtain what?
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air temp and barometric pressure.
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after the torquemeter indicator is adjusted, you must return the switch on the back of the indicator to what position?
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R
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What are the two adjustments on the resistance liquid quantity indicating system?
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Centering and Range.
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The unshielded wire used as a power lead is called?
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Lo-Z
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The shielded wire used as a signal lead is called?
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Hi-Z
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Whaich fuel quantity tester is approved as safe for use with fuel in the tank?
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PSD60-1AF
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An open compensator in the fuel quantity indicating system causes the
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Reference leg to decrease.
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What happens to the output of a fuel quantity probe as the dielectric constant of the fuel increases?
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Capaticance increases, capacitive reactance decreases, and curent increases.
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The DC fuel quantity indicating system is less susceptible to inaccuracies cause by fuel contamination because of higher frequency probe excitation and
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more space between the tubes.
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The DC fuel quantity indicating system does not need coaxial cables between the probes and indicator because the
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DC current sensor cannot sense stray capacitance.
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The DC fuel quantity indicating syustem uses a compensation capacitor to correct for variations in?
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fuel density
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When the DC fuel quantity indicating system self test switch is pressed, the indicators should read what?
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98 % (+ or - 2 %) full
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What components eliminate the requirement to have numerous fuel probes in the fuel tanks?
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Attitude sensors.
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The three operational modes as selected on the fuel center of gravity managment system's panel are OPT CRUISE,
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NORM, and SET.
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What mode is entered when both intermediate devices experience an SCP test failure?
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Throughput.
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