MD Helicopters MD900 with PW206E, Flight Manual

Page: 276 / 450

CSP–900RFM206E–1
ROTORCRAFT FLIGHT MANUAL
MD900 With PW 206E
Systems Description
Original
7–38
7–14.INTEGRATED INSTRUMENTATION DISPLAY SYSTEM (IIDS)
The IIDS provides for the monitoring and display of various aircraft
parameters and for caution/warning annunciation. The baseline config
uration includes a set of engine, drive train, rotor, NOTAR
, electrical,
fuel, hydraulic, and caution/warning indicators. It also incorporates a
built−in rotor and NOTAR fan balance system and stores system oper
ating and exceedance parameters for enhanced maintainability.
The IIDS accepts analog and discrete inputs from various aircraft sub
system transducers and
provides signal conditioning and conversion
to digital format. Once converted to digital format, this information
is provided to the display electronics for the cockpit display and to a
serial port for access by a data recorder or computer. Also, limit checking
on certain
parameters is performed to provide the caution/warning an
nunciation. The display is a color, Liquid Crystal Display (LCD) panel
which allows the flexibility of integrating the specified sensor data and
caution/warning information onto a display packaged as one unit.
Three levels of Built−in−Test (BIT) are used to determine system health,
including Power−up, Continuous, and Commanded BIT. Power−up diag
nostics will check the health of each function or module within the IIDS
and display this test status. Continuous testing checks the operation
of the IIDS during aircraft operation and displays and/or logs any fail
ures. Commanded BIT, initiated using the IIDS keyboard, performs
a display test, along with those tests performed during Continuous BIT.
The display is put into ‘‘lamp test’’ mode, where all segments are acti
vated, so that the display can be visually inspected for segment failures.
Both Power−up and Commanded BIT test the two engine and the trans
mission fire detectors, and the bleed air leak detector (if installed).
General
Built–In–Test