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VOR stations are subject to _______ restrictions
line-of-sight
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VORTAC stations transmit in a ______ scheme which allows the VOR portion to be received by the T-6A VOR receiver.
frequency pairing
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VOR/TACAN station are oriented to _______.
magnetic north
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Flight instruments consist of three systems:
- Electronic Flight Instruments (EFIS)
- Air Data System (ADS)
- Standby instruments
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The AHRS DG position allows what:
the EHSI to become a compass card with inaccurate heading information
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Slew control, controls what?
works only with AHRS in the DG position. allows movement of the compass card (CW or CCW)
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The airspeed, altimeter and VSI get there data from what?
Air Data Computer (ADC), over ADC channels A and B
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Two independent pitot static systems. Which side is the primary pitot static system on?
Right wingtip, static ports L and R fuselage
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ADC does not correct for _____, ______,_____
temperature, position, instrument error
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Standby instruments receive pitot/static information from where?
Secondary pitot/static system; Left wingtip, static ports L/R fuselage
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EHSI and EIDs (airspeed, Altitude, VSI) are on what bus?
Generator
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ADC is located on what bus?
generator
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EADI is on what bus?
battery
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standby instruments are on what bus?
Battery
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The electronic instrument displays (EID) receive sensor data from the _____.
air data computer (ADC)
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EADI and EHSI operate in the enroute mode and the approach mode based on what?
based on the active navigation sensor selected on the RMU
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Enroute mode of EADI displays what?
- Roll scale and sky pointer indicates L/R bank
- Pitch scale- 2.5° increments w/in 30° of horizon; 5° increments from 30-85 from horizon
- simulated horizon line
- fixed amber a/c reference
- Rate of Turn on bottom
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When does the EADI declutter in unusual a/c attitudes?
- Pitch: +30° or -20°
- Roll: 65°
- Recovery: -5° on both pitch and roll
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When does the EADI declutter in unusual a/c attitudes and present red chevrons?
Pitch > 40-90° nose low/high
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Enroute or approach mode, the EHSI has five displays, what are they?
- DG only
- HSI compass rose
- HSI map
- ARC compass rose
- Expanded Navigation map
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What mode is the EHSI in?
Enroute
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Pulling out the HDG knob does what?
Resets the HDG bug to the present a/c heading
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Pulling out the CRS knob does what?
resets the CRS pointer and digital course readout to a direct course to the selected NAVAID or waypoint
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- toggles between Nav data page and DG data page
- returns to HSI normal mode
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What does the NAV button do?
selects between navigational sensor, NAVAID/GPS, with or without TTG or GS
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Bearing pointer selector does what?
- controls which navigational source is displayed on the associated EHSI bearing pointer
- Declutter mode - removes associated bearing pointer from display
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What does the MAP button do?
- displays navigational map mose: course and range circle
- GPS: Waypoints, w/ ground stations, w/ airports, w/ both ground stations and airports
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- increase range/ decrease range
- Number indicates radius of circle
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presents a large scale view showing 85° of the compass
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How do you get the EADI in composite mode?
press the CMP button, lower left corner
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what does the EADI and EHSI look like in approach mode?
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electric flight instruments is on what bus?
generator; ASI, VVI, ALTM
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The attitude indicator needs to be caged and locked when?
- prior to applying power to the instrument (before engine start) or
- prior to removing power (engine shutdown)
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How long will this continue to operate and within what limitations, given a battery failure?
nine minutes; indications within 6°
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Compass readings are only accurate when?
level, unaccelerated flight
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All standby instruments are on what bus?
battery; GRYRO, ALTM, TURN RT
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Instrument lights (STBY INST) are on what bus?
battery
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