Internal
B777 FFS FT122 ZRH
Differences to Aircraft
14.8.2023,
Revision 1.2
lufthansa-aviation-training.com
Internal
B777 FFS FT122 ZRH – Differences to Aircraft
Major Differences
SD 1 General, Emer Equip, Doors, Windows
System
ACFT (HB-JNA)
SIM
Airplane Information
Management System (AIMS)
STD V17C
STD V17A
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Internal
B777 FFS FT122 ZRH – Differences to Aircraft
Major Differences – Details – AIMS STD V17C (ACFT) vs. V17A (SIM)
General
▪ V17C
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Internal
B777 FFS FT122 ZRH – Differences to Aircraft
Major Differences – Details – AIMS STD V17C (ACFT) vs. V17A (SIM)
Autothrottle Automatic Activation
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Internal
B777 FFS FT122 ZRH – Differences to Aircraft
Major Differences – Details – AIMS STD V17C (ACFT) vs. V17A (SIM)
Autothrottle Automatic Activation
Core message
Autothrottle response in low airspeed conditions
This AIMS BP V17C update adds enhancements to the thrust management computing function (TMCF), allowing autothrottle
detection and response to aircraft low energy states in certain modes.
This update also increases the number of modes that allow autothrottle automatic engagement for low airspeed conditions.
Airspeed low awareness
The current “AIRSPEED LOW” caution alert is triggered when the airspeed falls into the amber band by 30 percent or more for all
flap settings.
With the new AIMS 17C there is a new trigger for Flaps 25 and 30. The “AIRSPEED LOW” caution will be triggered at a higher
Airspeed then with other flap settings, to provide an earlier indication of decaying airspeed at the critical landing phase of flight.
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Internal
B777 FFS FT122 ZRH – Differences to Aircraft
Major Differences – Details – AIMS STD V17C (ACFT) vs. V17A (SIM)
Autothrottle Automatic Activation
Autothrottle Automatic Activation?
AIMS 17 A: there are some exceptions
The autothrottle can automatically activate to provide stall protection
AIMS 17 C: in any case!
Conditon:
•
depending on Thrust and Pitch Mode and
•
speed is less than an FMC calculated value for 1 second and
•
thrust is below reference thrust limit and
During Approach:
RA is above 100ft
After take off:
barometric altitude is above 400 ft
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Internal
B777 FFS FT122 ZRH – Differences to Aircraft
Major Differences – Details – AIMS STD V17C (ACFT) vs. V17A (SIM)
Autothrottle Automatic Activation
Status AT
17A
17C
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Pitch Mode
Armend +
not active
•
•
•
•
•
ALT
V/S, FPA
VNAV ALT, VNAV PTH
G/S
no active pitch mode
Armend +
not active
•
•
•
•
•
ALT
V/S, FPA
VNAV ALT,
G/S
no active pitch mode
AT Activates:
In SPD Mode
In SPD Mode
Advances Thrust:
To maintain:
•
minimum maneuvering speed
•
or speed set in the IAS/MACH
window, whichever is greater
To maintain:
•
minimum maneuvering speed
•
or speed set in the IAS/MACH
window, whichever is greater
Internal
B777 FFS FT122 ZRH – Differences to Aircraft
Major Differences – Details – AIMS STD V17C (ACFT) vs. V17A (SIM)
Autothrottle Automatic Activation
Status AT
17A
17C
Pitch Mode
AT Activates:
In THR REF
Mode
NO
Advances Thrust:
Armend +
not active
•
•
VNAV SPD + climbing:
FLCH SPD + climbing:
To climb reference thrust limit
Armend +
not active
•
•
VNAV SPD + descending:
FLCH SPD + descending:
Armend +
not active
•
•
VNAV SPD + climbing:
FLCH SPD + climbing:
In THR REF
Mode
In THR Mode
To climb reference thrust limit
up to climb reference thrust limit
Armend +
not active
•
•
VNAV SPD + descending:
FLCH SPD + descending:
In THR Mode
In THR Mode
up to climb reference thrust limit
NO
NO
Note: THR REF is never displayed together with FLCH SPD,
even if reference thrust is the target thrust level
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Internal
B777 FFS FT122 ZRH – Differences to Aircraft
Major Differences – Details – AIMS STD V17C (ACFT) vs. V17A (SIM)
Autothrottle Automatic Activation
Status AT
17A
17C
Pitch Mode
AT Activates:
ANY
STATUS
•
•
FLCH SPD
TOGA
NO
NO
HOLD
•
ANY MODE
NO
HOLD
•
TOGA during take off
NO
HOLD
•
•
•
FLCH SPD
VNAV SPD
VNAV PTH
HOLD
•
TOGA during take off
In THR Mode
In THR REF Mode
Advances Thrust:
Proportional, up to climb reference
thrust limit
Towards TO thrust reference while
airspeed is within 10 kts of stick
shaker speed.
According to Boeing, at flaps 30, the minimum threshold is 8 knots below Vref.
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Internal
B777 FFS FT122 ZRH – Differences to Aircraft
Major Differences – Details – AIMS STD V17C (ACFT) vs. V17A (SIM)
Autothrottle Automatic Activation
Status AT
Pitch Mode
AT Activates:
17A
Armend +
not active
•
TOGA during Go around
NO
17C
Armend +
not active
•
TOGA during Go around
In THR REF Mode
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Advances Thrust:
Towards thrust reference limit
Internal
B777 FFS FT122 ZRH – Differences to Aircraft
Major Differences – Details – AIMS STD V17C (ACFT) vs. V17A (SIM)
NAV STEP CLIMB Logic
This BP V17C update modifies the flight
management computing function (FMCF) to
implement a conditional deletion of the “CRZ”
page field “1R STEP TO” altitude message.
AIMS 17C
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Internal
B777 FFS FT122 ZRH – Differences to Aircraft
Other Simulator Specialties
▪ nil
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Internal
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