Flight Instruments/Displays Flashcards
Airspeed Trend indication
Predicted airspeed in 10 seconds based on current acceleration or deceleration
When does current airspeed box turn amber?
Current airspeed less than maneuvering speed
Indication from Maximum Airspeed Tape?
Max airspeed in relation to the lowest of:
- VMO/MMO
- Landing Gear Speed
- Flap Speed
Pitch Limit Indication
- pitch limit of speed shaker activation for current conditions
- max +30º
When does LOC and G/S pointer turn solid
Within 2 1/3 dot of center
EFIS/EICAS Interface Unit (EIU)/IRS/Air Data Source Selector Priority in AUTO
CA: LEFT/CENTER/RIGHT
FO: RIGHT/CENTER/LEFT
How many display units?
6 Display Units (DUs)
- 2 PFDs, (CA and FO)
- 2 NDs (CA and FO)
- Upper EICAS
- Lower EICAS
How is aircraft system information supplied to the Display Units (DUs)?
3 identical EFIS/EICAS Interface Units (EIUs)
Display Unit Switching Priority
- PFD over ND
- Upper EICAS over LOWER EICAS
Power Source for Integrated Standby Flight Display (ISFD)
Main Battery Bus
Dashes replacing information on PFD
Information in unavailable
Components of Air Data Computer Systems
- 2 or 3 Air Data Computers (ADCs); (L and R) or (L, C, and R)
- 4 pitot tubes (Upper L, Lower L, Upper R, Lower R)
- 4 static sources (Main L, Main R, Alt L, Alt R)
- 2 Angle of Attack vanes (AOAs)
- 2 Total Air Temperature probes (TATs)
What supplies supplies Heading Info to the ND?
Selected Inertial Reference Unit (IRU)
When does Heading reference True North?
When aircraft is North of 82º N latitude or South of 82º S latitude
Position Trend Vector Intervals
- UP to 3 segments depending on MAP range
- each segment is 30 sec
- 30 sec, 60 sec, 90 sec
- based on bank angle and ground speed
VNAV PATH scale indication
- displayed during descend only with selected VNAV PATH
- +/- 400’ deviation
Types of EICAS messages
1) alert messages
2) memo messages
3) Status messages
Priority levels of alert messages
- Warning
- Caution
- Advisory
Where is the most recent EICAS message displayed?
At the top of its priority group
Where is the most recent Memo displayed
At the bottom of the memo messages
What is a Memo message and where are they displayed?
- EICAS memo messages are crew reminders of certain flight crew selected normal conditions
- They display in white at the bottom of the last page of EICAS alert messages on the primary EICAS display.
What does the Status Cue mean and what color?
- new EICAS message exists
- inhibited from engine start to 30 mins after lift off
- color cyan
EIU selector in AUTO
- selects an operable EIU to provide data to EFIS and EICAS
* Selects left, then center, then right
What does pushing the RECALL button do
- redisplays all caution and advisory EICAS messages, when respective non-normal condition exists
- displays first page of messages when multiple pages exist
- redisplays red box for parameters previously exceeded
- displays RECALL indication for one second after switch released
