Flight Instruments Flashcards
Is there an EFIS control backup?
Yes. Backup EFIS/DSP on the SYS page of the MFD
PFD/MFD selector?
Used to switch displays
Usually switching is automatic
PFD/MFD switch is backup
AIR DATA/ATT selector?
Backup data normally provided automatically
Switch provides backup of airspeed, altitude and attitude data
CCD?
Cursor Control Device
Touchpad
4 cursor location and cursor select switches
HEADING REF switch?
NORM - heading ref for instruments is magnetic north
Automatically changes to true north in vicinity of poles
TRUE - changes reference to true north under all conditions
EICAS switch?
EICAS transfer switch
Transfers EICAS display between captain’s and FO’s inboard DUs
Where does the ISFD receive it’s heading info from?
Same source as captain’s PFD
WAIT ATT or ATT:RST message in ISFD
Momentary out-of-limit condition sensed
How is ISFD initialized?
By turning battery switch on
90 seconds to initialize
WAIT ATT displays
If 6 minutes later not initialized, ATT:RST message
ATT RST switch?
Pushed and held for two seconds will align attitude horizon with the airplane symbol (takes 10 seconds)
On ground, will begin new initialization sequence
How many degrees of pitch will display the red arrows on the ISFD?
30 degrees
What is the lower half of the auxiliary display for?
Used to display uplinked messages
COMM system messages
Flight information messages
Elapsed time?
Reset to zero once v-speeds entered
Starts with weight off wheels
Ends with weight on wheels +30 seconds
ADRS?
Air Data Reference System
Primary Air Data
Secondary Air Data
Standby Air Data
6 air data modules 6 static ports 3 pitot probes 2 AOA vanes 1 TAT probe
What do air data modules do?
Convert air data information into digital output for use by various aircraft systems
Where does ADRS receive TAT information from?
In addition to the TAT probe on the forward left fuselage, each EEC sends TAT measurements, for a total of 6 ADRS TAT inputs
On ground, at less than 50 knots ADRS uses CAC inlet data, uses lower of 2 inlet temps
What does the bottom of the amber airspeed bar indicate?
Maximum maneuvering speed, or 1.3g to high speed buffet.
What does the top of the amber band on the airspeed indicator represent?
Minimum maneuvering airspeed
Below 20,000 feet
1.3g capability to stick shaker
Above 20,000 feet
1.3g capability to low speed buffet
What does the altitude trend vector indicate?
Altitude in six seconds, based on current vertical speed
Landing altitude reference bar?
Displays white 500 to 1,000 feet above touchdown
Displays amber 500 to touchdown altitude
Landing altitude indication?
FMC landing altitude for destination runway,
or the landing altitude for departure runway until 400 nm from departure or one-half distance to destination, whichever first
When is vertical speed displayed digitally?
When vertical speed is greater than 400 ft/min
When are the FPV/FPA switches displayed in bright mode vs. dim mode?
They are displayed in bright when EFIS FPV switch on, or MCP FPA switch on, and flight directors are OFF
Dim when all the above but the FDs are ON
When does heading scale show on the PFD attitude area?
When EFIS FPV or MCP FPA selected and current bank angle less than 50 degrees and absolute pitch angle less than 20 degrees
What does it mean when the white navigation performance bars meet in the middle?
If ANP equals or exceeds RNP
After 5 seconds, the bars and scale turn amber, indication RNP operations can no longer be maintained
NAV UNABLE RNP (lateral nav only)
How much deviation does a rectangle on the expanded localizer scale indicate?
One half dot deviation
What is IAN?
Integrated Approach Navigation
Uses ILS-like procedures for non-precision approaches
Which warnings will display in red on the PFD (under attitude display)?
Alerts for:
ENGINE FAIL
GPWS
PWS
How do you turn on the HUD?
Pushing down on the combiner until it snaps I to the down position
ALIGN HUD
The combiner is not aligned with the projector. Removed by ensuring the combiner is positioned at the stop
HUD breakaway position?
Combiner rotates for ward and locks if sudden and sustained deceleration, preventing head injury
HUD symbology control switch?
Switch on yoke by electric trim, alternates between full and decluttered modes
Where are the pitch up/pitch down chevrons located on the HUD?
Pitch up on the -20 degree line
Pitch down on the +30 degree line
When is the Unusual Attitude symbology displayed on the HUD?
When pitch angle exceeds -20 degrees or +35 degrees
If roll exceeds 55 degrees
It remains until pitch angle between -5 and +10 degrees for 5 seconds
And roll angle is less than 10 degrees for 5 seconds
HUD Zenith symbol?
Asterisk type symbol
HUD Nadir symbol?
Circle-type symbol with a line segment pointing up
What is the horizontal line depicted on the HUD when in TOGA mode?
Target attitude for TOGA
Placing the aircraft symbol on this line will comply with the command
Symbol will become visible at 65 kts during takeoff
HUD: What is the angle of the Flight Path Vector Symbol’s wing roots?
Why?
30 degrees
So in a 30 degree bank, the upward wing’s root is parallel with the horizon and pitch scale lines
Is there a priority for symbology display on the HUD?
Yes. The FPV symbol takes priority over all other symbols, other than the guidance cue. Nothing else will appear within the FPV circle.
It may be limited laterally by speed tape of altitude tape, and would be dashed and not indicate actual lateral drift
HUD: When is the guidance cue available?
When does it appear on takeoff?
What happens in the event of windshear alert?
It is available when the FD is selected on
It appears at 50 feet RA on takeoff
It changes from hollow to filled in the event of a windshear alert
HUD: What does the AOA limit symbol look like?
What is it referenced to?
What does the distance between the AOA symbol and the FPV indicate?
It looks like a line segment with hanging boxes on either end
It is referenced to the FPV
The distance represents the margin available to stick shaker
HUD: When is the AOA limit symbol displayed?
AOA is within 5 degrees of stick shaker
Stick shaker is active
OR
The windshear solid guidance cue is displayed
HUD: When is the FPV-referenced slip/skid indicator displayed?
What is its purpose?
Only during takeoff or go-around
It provides additional yaw reference in case of engine failure
Describe the TCAS display in the HUD?
The HUD displays a “fly-to” box that the FPV should be contained in
HUD: Flight path acceleration symbol?
When is it removed from the display?
If the symbol is above the wing of the FPV, the aircraft is accelerating
Below, it is decelerating
It is removed during a decreasing-performance windshear alert below 400 AGL
On the HUD, what does the speed error tape display?
When does it display?
The difference between the indicated speed and the selected speed
At first flap retraction
On the HUD, what is the symbology if the current airspeed is faster than selected airspeed?
If it is slower?
A bar extends upward from the FPV wing
A bar extends downward from the FPV wing
HUD: What does the glideslope/glidepath reference line look like?
When is it shown?
When is it removed?
It is a dashed horizontal line
It is shown when Vref is selected
It is removed at 70 feet RA
HUD: In which mode does the runway symbol appear?
When is it removed?
What are the tick marks?
Only in decluttered mode
At 60 feet RA
Touchdown aiming point
HUD: Describe ground deceleration rate scale
When is it displayed?
A vertical indexed scale and pointer indicating actual deceleration rate
On landing or on takeoff when deceleration is sensed above 50 knots
How is the MAP mode oriented?
Track up
How are Map keys selected?
Using EFIS control panel
CCD
MFD cursor control selector
How is PLAN mode referenced?
True North up
What supplies the TRACK information on the ND?
Normally supplied by the FMC
In alternate navigation it is supplied by the IRS
Where is the mini map display?
Can it display TCAS?
Can it display radar?
On the bottom of the PFD
Yes
Yes
When does the airport map display on the ND?
Automatically when
What is VSD?
Vertical Situation Display
What are the cyan dashed lines on the ND map display?
The VSD Corridor, the area mapped by the VSD
Follows the route, not just a straight look -ahead
What is the green dashed line in the VSD profile view?
The selected BARO minimums
What are colors used for on ND display?
White?
Green?
Magenta?
Cyan?
Amber?
Red?
White is used for present status and range scales
Green is used for dynamic conditions
Magenta is used for command info, pointers, symbols and fly-to symbols
Cyan is non-active or background info
Amber is used for cautions, faults or flags
Red is used for warnings
Is the electronic checklist required for dispatch?
No
So a paper checklist or other approved alternate must be available on the flight deck
How is the electronic checklist opened?
Using the CHKL switch on the DSP
The checklist priority system uses what inputs to determine what checklist is displayed?
Air/Ground logic
Fuel control switch
Start selector position
EICAS message level
On ground with both FUEL CONTROL switches in CUTOFF, and both engine start selectors in NORM, what is the checklist priority?
EICAS warning messages
Incomplete/Unopened NORMAL checklists
On ground with one or both fuel control switches in RUN, one or more start selectors in NORM, or in the air, what is the checklist priority?
EICAS alert messages with icons
Incomplete unannunciated checklists
NORMAL checklists
What are the three types of checklists?
Normal
Non-normal annunciated
Non-normal unannunciated
How do you select the next NORMAL checklist?
Pressing the CHKL switch twice
OR
Selecting the NORMAL key on the MFD
What does a checklist white line item indicate?
Incomplete line item
What is a checklist green line item?
An item that has been completed
with a green complete indicator
What does a cyan checklist line item indicate?
Overridden and inactive line item
Two types of action items:
Closed loop
And
Open loop
What is a closed loop checklist item?
Airplane automatically determines switch, lever, or selector position, etc.
Once the selector is in the correct position, the airplane marks the item complete and the current line item box moves on to the next open item
What is an open loop checklist item?
Not monitored by the aircraft. The crew must manually confirm completion with the CCD
Operational notes?
Should be read, but action is not required
Once non-normal checklist with operational notes is opened, can access operational notes for the rest of the flight (on the operational notes page)
Selecting YES on an open loop conditional item:
The line item below the co sit-up also line item becomes active
Selecting NO on an open loop conditional line item:
The line items indented below the conditional line item become inactive and change color to cyan
Are YES-NO choices a one-time only choice?
No. They remain active and can be revisited at any time
How does a closed loop conditional line item work?
Choice is made automatically by the aircraft
If true, line item and indented items change to green
If false, line item and indented items change to cyan
Should the crew do the checklist for the primary message or for the consequential message?
Primary message
RESETS page?
Intended for ground use only
If used in flight, will require the crew to start the checklists over
CHKL INCOMPLETE NORM EICAS
Critical line items in a checklist are not complete before the corresponding phase of flight
CHKL NON-NORMAL EICAS
There is a non-normal checklist in the queue, despite no EICAS message
CHECKLIST NOT AVAIL?
System inoperative
CHECKLIST DISABLED?
System has been disabled by maintenance
CHKL RESET key?
Used to restart a partially or fully completed checklist
All action and conditional items become incomplete
PWR switch on EFB?
Only turns the display backlight on or off
XFR on EFB?
View of off-side EFB screen displayed
XFR (green) displayed
Second push returns on-side display
What keys on the EFB are enabled while in XFR mode
Only XFR and MENU keys
Selectable range for the ND map?
0.5 nm to 1,280 nm
Where do WXR TFC TERR selections from the EFIS control Panel display?
Both the ND and the mini-map display
Where are the Instrument Source Select Panels located?
They’re located on the forward panel, outboard of the PFDs
AIR DATA/ATT switch in AUTO?
ADRS provides air data to the PFD and HUD
Backup airspeed, altitude and attitude provided as required (by AOA, inertial data, GPS, IRS and ISFD)
AIR DATA/ATT switch in ALTN?
Backup airspeed, altitude and attitude displayed on PFD and HUD
What are DSPs, where are they found and what do they do?
Display Select Panels
Located on glare shield on respective sides
Provide control of MFDs for the on-side Inboard DU
Overhead light on the DSP?
Indicates which side of DU displays MFD
EICAS switch on DSP?
Transfers EICAS format between Captain and FO DUs
ENG switch on DSP?
Displays secondary engine indications on MFD
CANC/RCL switch on DSP?
Handles EICAS messages
What are the MFKs and where are they located?
Multifunction Keypad
Either side of the lower display unit
What displays do the CCDs access?
Only the MFDs and the EFBs
CCD cursor select switch?
Buttons on either side of CCD
Equivalent of a mouse button
What are the backup sources for airspeed?
AOA SPD/ Inertial data
ISFD source
What are the backup sources for the barometric altitude?
GPS altitude
ISFD Altitude
Are the amber band indications and Mach indication displayed when AOA SPD or ISFD SPD is displayed?
No
Can GPS derived altitudes be used to maintain ATC assigned altitudes?
No
In general on the EFIS displays, what do flags indicate?
What do dashes or removed displays indicate?
Flags are displayed for system failures or invalid information
Removed indications or dashes indicate when source information is not available
Path of GPS information stream
GPS transmitter
GPS receivers (2)
IRS
FMC
If the IRS becomes inoperative, where does the FMC get its position data?
Directly from the GPS receivers
If the IRS becomes inoperative and the FMC uses GPS information, what EICAS displays?
None
GPS EICAS?
Both GPS systems have failed
When should GPS updates not be used for an approach?
When a specific state requires the use of other provisions in their airspace (other than WGS-84 compliant)
ISFD inputs?
Center pitot static system
Altitude, attitude and airspeed are independent of IRU and AHRU values
Horn in wheel well?
IRS is on battery power
If dashes in the REF AIRPORT and SET INERTIAL POS lines on the POS INIT page?
If boxes instead of dashes?
GPS position is being provided for IRS alignment
Boxes indicate input required
How long does IRS alignment take?
7-10 minutes at low latitudes
17 minutes at high latitudes
ENTER INERTIAL POSITION message?
Lat/long entered by crew does not compute
ALIGNMENT REINITIATED message?
Present position entry failed twice
Automatic realign mode?
If aircraft stops for an extended period, automatically realigns until moves again
Velocity and acceleration errors are reset to 0
If inflight loss of power or inadvertent shutdown, can IRUs be recovered?
Yes, fully recovered if GPS is available
Attitude info available within seconds
Full navigation ability within approx. 10 mins
NAV INERTIAL SYS EICAS?
IRS has failed, both IRUs and AHRUs
GPS can supply position and track data
VNAV and LNAV not available to the autopilot however
Inoperative AFDS modes after IRS failure?
FPA G/S LNAV VNAV LOC TO/GA TRK HOLD/SEL HDG HOLD/SEL*
*operative when mag compass hdg entered on POS INIT page
Inoperative PFD and ND functions after IRS failure?
FMC performance predictions
FMC VNAV pages
ND wind arrow
PFD Heading*
*available when mag compass hdg entered on POS INIT page
What are the two conditions for ILS auto tuning to occur?
Approach must have been selected to the active route
AND
Airplane must be within 50 nm from TOD OR 150nm from landing runway OR FMC in Descent Mode
When is ILS autotuning inhibited?
For 10 minutes after takeoff to prevent clutter on PFD
How do you override the takeoff inhibition of ILS autotuning?
Sleek ruin and execution of new approach in the active flight plan
ATC conditional clearance point?
Displayed in MAP, MAP CTR and PLAN modes
Indicates the FMC calculated map position where the aircraft should comply with an ATC conditional clearance
