Terms in this set (60)
Name the 5 columns of the FMA.
How many IRs must be aligned and operating normally for the Flight Directors to function?
At least 2.
What will happen to the Flight Directors if pitch or bank limits are exceeded?
They will disappear from the PFD
When both FDs and autopilots are off, what is the resulting FMA indication?
All columns are blank except for SPEED in the first column if the autothrust is on.
Are there ever dashes in the FCU altitude window?
In the event of a dual channel FCU failure, what is displayed on the PFD?
The Flight Path Vector (FPV....you know, the bird (is the word))
When airborne, what are the default flight guidance modes when the first FD or autopilot is engaged from a blank FMA?
HDG-V/S (or TRK-FPA, if selected)
If a takeoff is made with the FDs off, what is the default V2 speed ?
If a pilot is manually flying with the FDs coupled to an ILS (LOC and G/S modes), and then resets the FDs by selecting both off and then on, what modes will become active? What if an autopilot is on?
If an autopilot is on, LOC-G/S will remain active.
What are the bank limits of the flight guidance?
Bank angle never exceeds 30 degrees
Normal bank angle is 25 degrees
Bank angle limits are reduced for:
- High TAS
- LOC tracking at low altitudes
- Single-engine in takeoff and approach phases at less than maneuvering speed for present configuration
The failure of a FMGC results in the failure of what else?
The associated FD, autopilot, and autothrust
What systems must be operational for the autopilots to engage?
- The associated FMGC
- Certain flight control computers and surfaces
- At least 2 ADIRUs
Will the autopilots operate with the flight controls in alternate law?
Yes, depending on the specific failure.
When will the autopilot automatically disengage?
- If both thrust levers are set above the FLEX/MCT while on the ground (prevents a touch-and-go with the autopilot on)
- In normal law, if any normal law protection is exceeded or pitch/bank angles are excessive
- Airspeed at or below Alpha Prot
- During a non-precision approach when the aircraft reaches MDA-50 ft. in FINAL APP mode
When can both autopilots be engaged simultaneously?
When APPR has been armed on an ILS approach (LOC-G/S blue)
Both autopilots remain engaged during the initial portion of a missed approach but AP2 will disengage automatically when appropriate conditions are met.
When autothrust is armed, when will it become active?
When the thrust levers are moved into the active range.
2 engine - just above idle to CL
1 engine - just above idle to FLEX/MCT
If autothrust is OFF, with FDs on, when will it arm automatically?
- Takeoff when thrust is advanced to FLEX or TOGA
- In flight, with flaps 1 or greater, when thrust is advanced to TOGA
How can autothrust be disarmed?
- Pressing the illuminated A/THR pb on the FCU
- Pressing one of the instinctive disconnect pbs on the thrust levers
When would the thrust lock (THR LK) feature become active?
When the autothrust is active and incorrectly selected off by the pilot (A/THR pb) or by system failure and the thrust levers are in CL (2 eng) or MCT (1 eng).
How can the pilot release a thrust lock condition and remove THR LK on the FMA?
Move the thrust levers out of the detent. Engine thrust immediately changes to match thrust lever position.
Following an engine failure during a FLEX takeoff, how do you achieve MCT thrust?
Move the thrust levers out of FLEX/MCT detent and then back to the FLEX/MCT detent.
What are the fixed thrust modes of the autothrust and how are they presented on the FMA?
TOGA - MAN TOGA
FLX - MAN FLEX XX
MCT - MAN MCT
CLB - THR CLB
IDLE - THR IDLE
THR - MAN THR (autothrust is armed but levers are not in a detent)
What are the variable thrust modes of the autothrust and how are they presented on the FMA?
This mode will automatically activate when the aircraft levels off, V/S is selected, or when both FDs and autopilots are off.
Identical to SPEED but at higher altitudes
After activation of Alpha Floor and TOGA thrust is applied and locked (TOGA LK), how is normal autothrust operation achieved?
The conditions that triggered Alpha Floor must no longer be present and the autothrust is deactivated.
The recommended sequence is:
- Thrust levers to TOGA
- Deactivate autothrust with instinctive pb
- Thrust levers to CL and press FCU A/THR pb
If a FAC is selected OFF, but is still operable, which functions are off and which continue to operate?
The FAC continues to compute flight envelope functions, PFD maneuvering speed indications, and windshear warnings.
All rudder functions of the FAC (yaw damp, rudder trim/limiting) stop functioning.
When would you see CHECK GW at the bottom of the MCDU?
If a significant difference occurs between the FAC and FMS gross weights. The gross weight may be corrected on the FUEL PRED page but the pilot has no input in the FAC gross weight.
How is managed guidance recognized on the FCU?
Dashes in all of the windows except the altitude window and illumination of the managed guidance light next to the digital display.
With both FDs and autopilots off, what managed guidance is still available?
Managed speed guidance in the FMS approach phase
In the FMS approach phase, what is the managed speed?
Maneuvering speed for the aircraft configuration. The airspeed will automatically change as the configuration is changed.
What is the purpose of GSmini?
How can a pilot recognize GSmini is active?
The magenta Vapp triangle is higher than the computed Vapp displayed on the MCDU PERF APPR page.
Is it possible to couple the lateral flight guidance to a VOR, NDB, or LOC BC?
When is HDG/TRK automatically engaged?
- When the first FD or autopilot is engaged
- If the FDs are reset with both autopilots off
- If LOC is deselected or lost
- If the aircraft flies into a flight plan discontinuity
When is managed NAV automatically armed or engaged?
- Armed on the ground following the first engine start
- Engaged following a MCDU "direct to" function
When is OP CLB automatically engaged?
- After takeoff at acceleration altitude if managed CLB mode is not engaged
- When managed CLB is disengaged due to loss of managed NAV (selecting HDG)
- Mode reversion to ensure speed protection (speed is slow in V/S)
What speed will be used in EXP CLB?
Maneuvering speed for the current configuration, green dot for clean configuration. It is not recommended above FL250.
What speed will be used in EXP DES?
.80 Mach / 340 knots at idle thrust. It does not honor any speed limits except Vmax for the current configuration.
If the speedbrakes are used in DES mode while the aircraft is on or below the path, what will happen?
Thrust will increase to hold the target airspeed and descent path. No increase in descent rate occurs.
While in a holding pattern, what descent rate will DES mode command?
What is the difference between a speed limit and a speed constraint in the MCDU?
Speed limits are associated with altitudes, Speed constraints are associated with waypoint.
What is the difference between ALT and ALT CRZ modes?
ALT hold mode maintains the altitude in the FCU, when the FCU altitude matches the MCDU CRZ flight level, the soft hold mode engages and the altitude is allowed to vary as much as 50 ft. to minimize thrust variations and improve fuel efficiency.
When will the vertical mode automatically revert while in V/S?
Vertical speed has priority over airspeed in V/S. If a high rate of climb or descent is commanded in V/S, a vertical speed is maintained until a flight enveleope limit is reached. A reversion to OP CLB or OP DES occurs to regain desired speed.
What vertical reversions can occur due to an FCU altitude change?
CLB or OP CLB - if you change the FCU to an altitude below the current, reversion to V/S occurs at current vertical speed.
DES or OP DES - if you change the FCU to an altitude above the current, reversion to V/S occurs at current vertical speed.
ALT* - any FCU altitude change results in a reversion to V/S at current vertical speed.
When is SRS mode active?
When thrust levers are in FLEX or TOGA for takeoff and TOGA for go-around.
What does SRS mode provide?
Provides pitch guidance for optimum performance for normal takeoff, engine failure on takeoff, go-around, and windshear.
Takeoff - V2 + 10
Engine Failure - V2 or current speed, if higher
Go-around - speed at initiation of go-around or Vapp, whichever is higher
When is SRS mode disengaged?
Automatically upon reaching acceleration altitude or manually by engaging any other vertical climb mode if above 400 AGL.
What does RWY mode provide?
Provides lateral guidance during takeoff roll and initial climb when a localizer signal is available. The localizer is automatically tuned when the departure runway is selected on the MCDU FPLN page.
When does RWY become armed/active and disengage?
It arms when thrust is placed in FLEX or TOGA and a localizer is available. It is replaced by RWY TRK or NAV shortly after takeoff.
What does RWY TRK mode provide?
Provides lateral guidance to the extended runway centerline shortly after takeoff. It does not require a localizer signal.
When does RWY TRK automatically engage and disengage?
Automatically engages if NAV is not armed prior to takeoff. Disengages when another lateral mode is engaged.
What is the maximum rate of descent to capture the glide slope?
Approx. 2500 fpm
When is the FMS GO-AROUND mode automatically activated?
TOGA thrust is selected (even momentarily) with flaps 1 or greater.
What happens to lateral guidance automatically when thrust is placed in TOGA and FMS GO-AROUND mode is activated (flaps 1 or greater)?
Lateral guidance changes to GA TRK and guides the aircraft along the ground track at the time of activation. This is disengaged by pulling HDG or pushing NAV for the missed approach procedure.
What happens to vertical guidance automatically when thrust is placed in TOGA and FMS GO-AROUND mode is activated?
Vertical guidance changes to SRS and commands current speed or Vapp, whichever is higher. CLB mode is automatically armed.
A/THR is either OFF or INOP and you have 60% N1 set to maintain level flight and 250 knots. You select a higher altitude in the FCU and pull for the OP CLB. Instead of pushing the thrust up to CL, you bring them back to 40%. What will happen?
You will DESCEND in OP CLB. The FDs and/or AP will provide a pitch to maintain the target airspeed.
A pilot selects V/S +6000 FPM as a response to an ATC request to expedite climb. What is the likely outcome and when will it occur?
The vertical guidance will revert to OP CLB to regain the target airspeed when a flight envelope is reached, Vls in this case.
A pilot pushes the nose to level flight in response to a TCAS RA during an OP CLB. If the FDs are not selected OFF as they should be, what is the likely outcome and when will it occur?
In OP CLB, thrust is fixed at THR CLB. If flight guidance is not disengaged (both FDs OFF), thrust will remain fixed and the airspeed will increase toward Vmax. When the speed reaches a flight envelope, vertical guidance will revert to V/S and thrust will change to SPEED to regain the target airspeed.
What is the difference between THR LK and TOGA LK?
THR LK locks the thrust at the last commanded setting due to failure or unexpected OFF selection (A/THR pb). Thrust remains locked until moved out of CL.
TOGA LK locks the thrust in TOGA due to an Alpha Floor activation once the condition is no longer present. Thrust remains locked until moved to TOGA and an A/THR instinctive disconnect pb is pressed. Thrust will then change to MAN TOGA. Move the thrust to CL and reengage A/THR or to another thrust setting to manually control thrust.
What happens to A/THR when you perform a go-around with A/THR off?
A/THR is automatically armed when TOGA is selected and becomes active when thrust is moved to CL at thrust reduction altitude
An OP DES has been selected. What keeps the aircraft at the target airspeed during this descent?
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THIS SET IS OFTEN IN FOLDERS WITH...
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