RadAlt Flashcards
For which purpose does the Radar Altimeter (RadAlt) supply height reference information to the Automatic Flight Control System (AFCS)?
RadAlt height hold
Where does the Radar Altimeter (RadAlt) send blanking pulses to prevent self-detection?
Radar Warning Receiver (RWR)
What is the maximum height scale for the Radar Altimeter (RadAlt)?
0 to 5000 ft
Where is the Radar Altimeter (RadAlt) Transmitter/Receiver (Tx/Rx) located?
Forward lower fuselage
How is the output of the Radar Altimeter (RadAlt) passed to the Cockpit Display System (CDS)?
Via No. 1 Remote Interface Unit (RIU)
What converts the Radar Altimeter (RadAlt) signal from analogue to digital for height display?
Remote Interface Unit (RIU) 1
Where is the OFF/FLT/TEST switch associated with the Radar Altimeter (RadAlt) system located?
Overhead console
What power is supplied to the Transmitter/Receiver (Tx/Rx) by selecting the Radar Altimeter (RadAlt) switch to FLT?
115 Vac
What is the default reset Low Height (LH) setting for the Radar Altimeter (RadAlt) system when selected from either Rotary Control Panel (RCP)?
50 ft
How is the Radar Altimeter (RadAlt) height indicated on the Primary Flight Display (PFD)?
Height tape and digital readout on a non-linear circular scale
What colour is the height tape if the aircraft is above the Low Height (LH) datum?
Green
What are the pitch and roll limits associated with the Radar Altimeter (RadAlt)?
±25° pitch, ±30° roll
What are the indications if the Radar Altimeter (RadAlt) loses track?
No Computed Data (NCD) (—-) displayed in digital readouts
How are the Radar Altimeter (RadAlt) and Barometric (BarAlt) height indicators transposed on the Primary Flight Display (PFD)?
By selecting RADALT Integrated Display Unit (IDU) bezel key on PFD
What height would a “CHECK HEIGHT” audio be activated if the Low Height (LH) value is set to 725 ft?
650 ft
What is the Low Height (LH) threshold calculated limit?
10% of LH datum
What height is indicated if the OFF/FLT/TEST switch is selected to TEST?
100 ±10 ft
