Flight Instruments and Displays Flashcards
If both Capt and FO pitot tubes are inoperative, how is airspeed provided?
Standby airspeed indicator
Uses auxiliary pitot probe and alternate static ports
What directly provides inertial position and track data to the associated FMC?
ADIRUs - Air Data Inertial Reference Units
FCC A – Left ADIRU to FMCs
FCC B – Right ADIRU to FMCs
Failure flags are used to display system failures on which displays?
PFD
ND
ISFD
HGS
What indicates maximum operating speed (Vmax)?
Bottom of the upper red/black barber pole
It is the lower of Vmo/Mmo or flap/gear placard speeds
Pushing STD on the EFIS control panel does what?
Cycles between barometric pressure between standard and pre-selected/last selected
Flight path angle is available on the PFD through use of what?
Flight Path Vector
FPV button on EFIS control panel
Location of PFD, ND, and Engine Instrument displays are moved using switches on what panel?
Displays Select Panels
MAIN PANEL DUs and LOWER DU switches
What are the standby instruments?
Magnetic Compass
Standby Attitude Indicator
Standby Airspeed/Altimeter Indicator
Standby RMI
Integrated Standby Flight Display (ISFD)
What is the difference between the two CDS annunciators on the PFD? When would you see them?
CDS MAINT (white)
-Dispatchable CDS fault
-Failure of a single circuit card
CDS FAULT (amber)
-NON-dispatchable CDS fault
-Total DEU failure, or
-Failure of 2 or more circuit cards
Displayed on the ground only, prior to second engine start
Located on PFD below airspeed tape
Can the Integrated Standby Flight Display (ISFD) operate separately from the electrical system?
Yes, dedicated battery pack power ISFD for 150 minutes if normal power from the Battery Bus is lost
If the outboard DU fails is automatic switching available?
Yes, automatic switching available for failure of outboard or upper DU
PFD moves to inboard DU if outboard DU fails
How are the maneuver speeds indicated?
Maximum Maneuvering Speed
-Bottom of upper amber band
-Provides 1.3g/40* bank in level flight before high speed buffet
Minimum Maneuvering Speed
-Top of lower amber band
-Provides 1.3g/40* bank in level flight before low speed buffet/stick shaker
-Limit bank angle to 15* when operating below top of amber band
Flap Maneuvering Speeds
-Up for Flap # (green)
-Provides at least 40* bank before stick shaker
Maneuver Bug
-Solid white bug
-V2+15 on takeoff
–Provides full 30* bank maneuvering on takeoff
–Limit bank angle to 15* below maneuver bug
-Vref+20 on approach
How are the airspeeds bugged if the FMCs are inoperative?
SPD REF (Speed Reference) Selector knobs
When do the Pitch Limit Indicators (PLIs) appear?
Flaps extended, or
Airspeed approaches stick shaker (high AOA)
The expanded localizer scale is used to clue a pilot to localizer deviation, when does it populate?
A/P or F/D in LOC mode, and
Deviation is slightly more than 1/2 dot, and
Track is w/in 5* of MCP course
