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Applicable to: ALL
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PERFORMANCE
TAKEOFF
TAKEOFF CHARTS - MTOW CALCULATION (WEIGHT ENTRY)
Intentionally left blank
A318/A319/A320/A321 FLEET PER-TOF-TOC-18-40 P 2/2
FCOM 19 AUG 10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PERFORMANCE
TAKEOFF
TAKEOFF CHARTS - FLEXIBLE TAKEOFF (WEIGHT ENTRY)
A318/A319/A320/A321 FLEET PER-TOF-TOC-20-10 P 1/2
FCOM 19 AUG 10
DEFINITION OF FLEXIBLE TAKEOFF
DEFINITION OF FLEXIBLE TAKEOFF
Applicable to: ALL
In many cases, the aircraft takes off with a weight lower than the maximum permissible takeoff
weight. When this happens, it can meet the required performance (runway, second segment,
obstacle,...) with a decreased thrust that is adapted to the weight : this is called FLEXIBLE TAKEOFF
and the thrust is called FLEXIBLE TAKEOFF THRUST.
The use of flexible takeoff thrust saves engine life.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PERFORMANCE
TAKEOFF
TAKEOFF CHARTS - FLEXIBLE TAKEOFF (WEIGHT ENTRY)
Intentionally left blank
A318/A319/A320/A321 FLEET PER-TOF-TOC-20-10 P 2/2
FCOM 19 AUG 10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PERFORMANCE
TAKEOFF
TAKEOFF CHARTS - FLEXIBLE TAKEOFF (WEIGHT ENTRY)
A318/A319/A320/A321 FLEET PER-TOF-TOC-20-20 P 1/2
FCOM 19 AUG 10
USE OF FLEXIBLE TAKEOFF
USE OF FLEXIBLE TAKEOFF
Applicable to: ALL
The pilot can use flexible takeoff when the actual takeoff weight is lower than the maximum
permissible takeoff weight for the actual temperature. The maximum permissible takeoff weight
decreases when temperature increases, so it is possible to assume a temperature at which
the actual takeoff weight would be the limiting one. This temperature is called FLEXIBLE
TEMPERATURE or assumed temperature and is entered in the FADEC via the MCDU PERF TO
page in order to get the adapted thrust.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PERFORMANCE
TAKEOFF
TAKEOFF CHARTS - FLEXIBLE TAKEOFF (WEIGHT ENTRY)
Intentionally left blank
A318/A319/A320/A321 FLEET PER-TOF-TOC-20-20 P 2/2
FCOM 19 AUG 10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PERFORMANCE
TAKEOFF
TAKEOFF CHARTS - FLEXIBLE TAKEOFF (WEIGHT ENTRY)
A318/A319/A320/A321 FLEET PER-TOF-TOC-20-30 P 1/6
FCOM 19 AUG 10
REQUIREMENTS
REQUIREMENTS
Applicable to: ,
, MSN
Thrust must not be reduced by more than 25 % of ‐ the full rated takeoff thrust.
‐ The flexible takeoff N1 cannot be lower than the Max Climb N1 at the same flight conditions.
The FADEC takes the above two constraints into account to determine flexible N1.
‐ The flexible takeoff thrust cannot be lower than the Max Continuous thrust used for the final takeoff
flight path computation (at ISA + 40).
This constraint limits the maximum flexible temperature at ISA + 43 (58 °C at sea level).
‐ The flexible temperature cannot be lower than the flat rating temperature, TREF (ISA + 15), or the
actual temperature (OAT).
‐ Flexible takeoff is not permitted on contaminated runways.
‐ The operator should check the maximum thrust (TOGA) at regular intervals in order to detect any
engine deterioration, or maintain an adequate engine performance monitoring program to follow up
the engine parameters.
REQUIREMENTS
Applicable to:
‐ Thrust must not be reduced by more than 25 % of the full rated takeoff thrust.
‐ The flexible takeoff N1 cannot be lower than the Max Climb N1 at the same flight conditions.
The FADEC takes the above two constraints into account to determine flexible N1.
The above two constraints also limit the maximum flexible temperature at ISA + 53 (68 °C at sea
level).
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PERFORMANCE
TAKEOFF
TAKEOFF CHARTS - FLEXIBLE TAKEOFF (WEIGHT ENTRY)
A318/A319/A320/A321 FLEET PER-TOF-TOC-20-30 P 2/6
FCOM 19 AUG 10
The flexible ‐ takeoff thrust cannot be lower than the Max Continuous thrust used for the final takeoff
flight path computation (at ISA + 40).
‐ The flexible temperature cannot be lower than the flat rating temperature, TREFSee * (ISA + 29 up
to 2 000 ft), or the actual temperature (OAT).
Note: * TREF being a function of pressure altitude, read it on the takeoff chart.
‐ Flexible takeoff is not permitted on contaminated runways.
‐ The operator should check the maximum thrust (TOGA) at regular intervals in order to detect any
engine deterioration, or maintain an adequate engine performance monitoring program to follow up
the engine parameters.
　
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