FLIGHT INSTRUMENTS AND DISPLAYS Flashcards
Altitude Disagree Alert (amber). When does it display?
Indicates the Captain’s and F/O’s altitude indications disagree by more than 200
feet for more than 5 continuous seconds.
Roll Flag (amber). When does it display?
The Captain and First Officer roll displays differ by more than 5 degrees.
Pitch Flag (amber). When does it display?
The Captain and First Officer pitch angle displays differ by more than 5 degrees
Expanded Localizer Scale. When does it display?
Displayed when the autopilot or flight director is in LOC mode, deviation is slightly more than one half dot and track is within 5 degrees of the MCP selected course.
A rectangle equals 1/2 dot deviation on the expanded localizer display. True or False?
True
Landing Altitude Reference Bar. What does white and yellow bar signify?
Indicates height above touchdown:
— White bar – 500 to 1000 feet above landing altitude
— Amber bar – 0 to 500 feet above landing altitude.
When does the radio altimeter start to display?
2500 AGL
What are the indicated analog AOA values?
-6 to 21 AOA
How many degrees of bank angle protection does the min maneuvering line give?
40 degrees to provide a 1.3 g protection
Flap maneuvering speeds give you how many degrees of bank protection?
40 degrees
Mach number starts indication on the bottom of airspeed starting when?
M0.40
True airspeed displays above how many knots?
100 kts
When does wind speed and direction display?
Above 6 knots of wind
VNAV path pointer and deviation scale is a 400 foot scale. True or False?
True
Dashed runway centerlines extend how many miles?
14.2 NM
When does the rising runway symbol start to come up?
Rises towards airplane symbol when radio altitude is below 200 feet.
AOA Disagree Alert (amber). When does it come on?
Indicates the left and right AOA values disagree by more than 10 degrees for more
than 10 continuous seconds.
Airspeed Disagree Alert (amber). When does it come up?
Indicates the captain’s and F/O’s airspeed indications disagree by more than 5
knots for 5 continuous seconds.
How many DEU do we have? Display Electronics Unit
2
How long does the ISFD take to initialize?
90 secs
What is the DEU equivilant on the MAX called?
DPC.. Display Processing Computer. 2 DPC’s
Can one DPC generate display for all screens if one fails?
Yes
Air Data Inertial Reference System (ADIRS). What it is?
The ADIRS produces flight data such as position, speed, altitude and attitude for the
flight displays, flight management computers, flight controls, engine controls and all
other systems requiring inertial and air data.
What components make up the ADIRS system?
The major components of the ADIRS are:
- two air data inertial reference units (ADIRUs) — four air data modules (ADMs) — one inertial system display unit (ISDU) — one dual mode select unit (MSU) — six static ports — three pitot probes — two alpha vanes — one total air temperature probe
How many ADIRU do we have?
2
How many IRS do we have that ties into the ADIRU’s?
2 total
How many air data modules do we have?
4
The primary source of data for the AOA indicator on the PFD is supplied by the
ADIRU, with the Stall Management Yaw Damper (SMYD) as the backup source. True or False?
True
Heading information for the ISFD is provided by the left ADIRU. True or False?
True
