Flight Instruments and Displays Flashcards
If both Capt and FO pitot tubes are inoperative (damaged/blocked), how is airspeed provided?
Standby airspeed indicator
What directly provides inertial position and track data to the associated FMC?
ADIRUs - Air Data Inertial Reference Units
Failure flags are used to display system failures on which displays?
PFD’s, NDs, ISFDs
What indicates maximum operating speed?
Top red barber pole
Pushing STD on the EFIS control panel does what?
Sets standard baro 29.92
Flight path angle is available on the PFD through use of what? How is it toggled ON/OFF?
Flight Path Vector (FPV) Indication via the FPV switch on the EFIS control panel.
The location of the PFD, ND, and Engine Instrument displays may be moved using switches on what panel?
Display Select Panel
What are the standby instruments?
Magnetic compass Standby attitude indicator
ISFD
Standby altimeter and airspeed indicator
Standby RMI
What is the difference between the two CDS lights on the PFD and when would you see them?
CDS MAINT (white) = dispatchable (circuit card failed in either DEU) CDS FAULT (amber) = Non-dispatchable (total DEU failure, two or more cards fail, or one card fails in each DEU) You would see them on the ground prior to the 2nd engine start
Can the Integrated Standby Flight Display operate separate from the electrical system?
Yes. The Battery Pack provides power to the ISFD when power from the Battery Bus is not available.
If the outboard display fails, is automatic switching available? If so, where is the PFD displayed?
Yes - displayed on the inboard display unit
How are maneuver speeds indicated?
Amber band —— = Guarantees 15° of bank before buffet
Between upper and lower amber band - Guarantees 40° of bank before buffet
Maximum Maneuvering speeds: bottom of amber band with flaps up Minimum Maneuvering speeds: top of amber band
How are airspeeds bugged if the FMCs are INOP?
The SPD REF Selector (Outer Knob)
When do the Pitch Limit Indicators populate?
When flaps are extended, OR
High AOA, approaching stick shaker
The Expanded Localizer Scale is used to clue a pilot to localizer deviation. What parameters cause the expanded scale to populate?
- Autopilot or FD is in LOC mode
- Deviation is slightly more than one half dot, and
- Track is within 5 degrees of the MCP-selected course
What is the logic of the Landing Altitude Indication (amber) on the PFD?
Indicates the airport elevation at departure point until 400nm or halfway to your destination
Using the VSD, how would you know that you will achieve a target speed within a certain distance?
A green dot indicates where the aircraft will achieve the FMC or MCP target speed at point shown on VSD. “range to target speed indicator”
Open circle means you won’t reach target speed
On the VSD, gates are provided at altitudes along an approach path?
500ft (amber) and 1000ft (white) above touchdown zone elevation
What causes the Altitude Disagree Alert, and where is it annunciated?
CAs & FOs altitude indications disagree by more than 200ft for more than 5 continuous seconds. ALT DISAGREE (amber) will display on both PFDs
What causes the airspeed Disagree Alert and where is it populated?
CAs & FOs airspeed indications disagree by more than 5 kts for 5 continuous seconds. IAS DISAGREE (amber) will display on both PFDs airspeed tape.
AOA integrity is monitored by comparing left and right AOA values. How much disagree causes a disagree alert?
More than 10 degrees for more than 10 continuous seconds. AOA DISAGREE (amber) will display on both PFDs.
What is indicated by terrain colors on the vertical situation display?
Green. Terrain is more than 500 feet below (250 with gear down)
Amber. Terrain from 500 feet below (250 gear down). to 2000 above the aircraft
Red. Terrain more than 2000 feet above the aircraft.
How is plan mode oriented
True north up
