Avionics - Autopilot, Flight Director & Autothrottle Flashcards
When the flight compartment or cabin temperatures are in excess of 40°C, what is the ground
operation limitation of the DUs? (AFM Limitations)
Operation for more than 30 minutes is prohibited
What is the minimum autopilot engagement height on takeoff? (AFM Limitations)
400ft AGL
What is the minimum height for autopilot use on an approach? (AFM)
80ft AGL
What is the steepest angle for approaches? (AFM Limitations)
Up to 3.5° without AFM supplement 8
3.5° - 4.5⁰ with AFM supplement 8
What will the autopilot do in the ROLL mode?
If bank angle is less than 5⁰ the flight director will command a heading hold
Will command a ROLL hold if current bank is more than 5⁰, limited to 30⁰
If above the bank limit (30⁰), will command a reduction of bank to 30⁰
If you press the CPL pushbutton on the FCP, what happens to the active flight director modes?
The FD modes revert to ROLL and FPA
An amber FD MODE CHANGE message appears
The pilot must manually re-select the desired modes
Do the green indicator lights on the FCP indicate that the adjacent mode is currently active?
No, they only indicate selection
The crew must confirm mode status/operation from the flight mode annunciator (FMA)
How are active/armed flight director and autothrottle modes indicated on the FMA?
Active modes displayed in green
Armed modes displayed in white
If the FD is off and the AP button is pushed, which modes will become active?
Basic modes: Roll (ROLL) and Flight Path Angle (FPA)
What ways can the AP be manually disengaged?
Pressing AP/PTY on either sidestick
Pressing the AP pushbutton on the FCP
Pitch Trim switch on either sidestick
Overcoming the resistance on either sidestick
Note: Only the red AP/PTY button will silence the AP disconnect warning.
When does the autopilot automatically disengage?
Reversion to direct mode
Invalid Data
AP monitor fault detection (a disagreement between autopilots)
Stick shaker activation
When is use of the FMS as a primary lateral navigation source beyond the FAF for instrument
approaches prohibited? (AFM Limitations)
Localizer-based approaches (ILS, LOC, LOC-BC, LDA, SDF, IGS)
9 When will NAV-to-NAV transfer occur?
Localizer-based approach is loaded in the FMS
Lateral mode is FMS or HDG
APPR Mode is selected on FCP
LOC is captured
When is the ILS frequency automatically tuned by the FMS?
Localizer-based approach is loaded in the FMS
Within 31nm direct distance from the destination airport
When does the independent ILS approach mode occur?
At GS capture and landing gear down
Note: the pilot and co-pilot’s PFDs must be displaying LOC data from different navigation
receivers on the two PFD displays