Diamond DA 42 NG, Maintenance Manual

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AIRCRAFT
DA 42 NG AMM Indicating Systems
Doc # 7.02.15
Rev. 4
31-40-00
Page 7
15 Mar 2018
The PFD window displays the usual primary flight instruments in a standard ‘T’ configuration. The
basic flight instruments are:
)
Airspeed indicator (ASI). The airspeed indicator is on the left side of the display and indicates
the airspeed on a rolling number gauge using a moving tape. The airspeed indicator also
displays speed ranges for different airplane configurations, airspeed trends and ‘V’ speeds. If
the airspeed indicator fails the display marks the airspeed display area with a red ’X’ and yellow
text spelling out ‘AIRSPEED FAIL’ (if MÄM 42-978 is NOT installed).
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)
TAS. True airspeed is digitally displayed in a small window below the airspeed indicator.
)
Attitude indicator (Artificial Horizon). The attitude indicator is located in the center of the PFD,
at the top. The attitude indicator shows the pitch, roll and yaw situation of the airplane. If the
attitude indicator fails the display marks the pitch attitude display area with a red ’X’ and yellow
text spelling out ‘ATTITUDE FAIL’ (if MÄM 42-978 is NOT installed).
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)
Altimeter. The altimeter is located at the top right of the PFD. The altimeter displays the airplane
altitude in feet on a rolling number gauge using a moving tape. The altimeter also shows a
altitude ‘bug’ at the selected altitude or the edge of the tape, whichever is closest to the current
altitude. If the altitude indicator fails the display marks the tape display area with a red ’X’ and
yellow text spelling out ‘ALTITUDE FAIL’ (if MÄM 42-978 is NOT installed).
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)
Barometric pressure indicator. The barometric pressure indicator is located immediately below
the altitude indicator. The indicator shows the barometric pressure that has been set in either
inches of mercury (Hg) or hectopascal number (hPa)
)
Vertical speed indicator (VSI). The vertical speed indicator is located to the right of the altitude
indicator. The indicator displays the airplane vertical speed in feet/min. A numeric pointer moves
vertically up/down a fixed tape. The vertical speed indication is also shown digitally on the
pointer. A negative sign is shown on the pointer to indicate negative vertical speeds (airplane
descending). If the VSI fails the display marks the tape display area with a red or yellow ’X’ and
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yellow text spelling out ‘VERT SPEED FAIL’ (if MÄM 42-978 is NOT installed).
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)
Horizontal situation indicator (HSI). The HSI s located in the center of the PFD at the bottom.
The HSI displays a rotating circular compass with heading markings. The HSI shows the
following information:
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Heading information. The heading is shown digitally in a window at the top of the rotating
compass.
)
Turn rate indicator. A turn rate indicator is located between the digital heading window and the
rotating compass.