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ADVERSE WEATHER - SEVERE TURBULENCE
A330/A340 FLEET PRO-SUP-91-10 P 2/6
FCOM 19 AUG 10
THRUST AND AIRSPEED
Applicable to:
Set the thrust to give the recommended speed (Refer to PRO-SUP-91-10 THRUST SETTING FOR
RECOMMENDED SPEED) . This thrust setting aims to obtain, in stabilized conditions, the speed for
turbulence penetration given in the graph below.
Change thrust only in case of an extreme variation in airspeed, and do not chase your Mach or
airspeed.
A transient increase is preferable to a loss of speed that decreases buffet margins and is difficult to
recover.
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
SUPPLEMENTARY PROCEDURES
ADVERSE WEATHER - SEVERE TURBULENCE
A330/A340 FLEET PRO-SUP-91-10 P 3/6
FCOM 19 AUG 10
THRUST AND AIRSPEED
Applicable to: ,
Set the thrust to give the recommended speed (Refer to PRO-SUP-91-10 THRUST SETTING FOR
RECOMMENDED SPEED) . This thrust setting aims to obtain, in stabilized conditions, the speed for
turbulence penetration given in the graph below.
Change thrust only in case of an extreme variation in airspeed, and do not chase your Mach or
airspeed.
A transient increase is preferable to a loss of speed that decreases buffet margins and is difficult to
recover.
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
SUPPLEMENTARY PROCEDURES
ADVERSE WEATHER - SEVERE TURBULENCE
A330/A340 FLEET PRO-SUP-91-10 P 4/6
FCOM 19 AUG 10
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
SUPPLEMENTARY PROCEDURES
ADVERSE WEATHER - SEVERE TURBULENCE
A330/A340 FLEET PRO-SUP-91-10 P 5/6
FCOM 19 AUG 10
THRUST SETTING FOR RECOMMENDED SPEED
Applicable to:
THRUST SETTING FOR RECOMMENDED SPEED
Applicable to:
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
SUPPLEMENTARY PROCEDURES
ADVERSE WEATHER - SEVERE TURBULENCE
A330/A340 FLEET PRO-SUP-91-10 P 6/6
FCOM 19 AUG 10
THRUST SETTING (N1) FOR RECOMMENDED SPEED
Applicable to: ,
ALTITUDE
Applicable to: ALL
If the flight crew manually flies the aircraft:
They can expect large variations in altitude, but ‐ should not chase altitude.
‐ They should maintain attitude, and allow altitude to vary.
SIGNS
Applicable to: ALL
Set all the cabin SIGNS to ON in advance of anticipated turbulence.
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
SUPPLEMENTARY PROCEDURES
ADVERSE WEATHER - OPERATIONS IN
WINDSHEAR OR DOWNBURST CONDITIONS
A330/A340 FLEET PRO-SUP-91-20 P 1/4
FCOM 19 AUG 10
PRECAUTIONS FOR SUSPECTED WINDSHEAR
Applicable to:
�� Before TAKEOFF
DELAY TAKEOFF until conditions are improved.
"ASSESS CONDITIONS for a SAFE TAKEOFF by"
• Using observations and experience.
• Checking weather conditions.
SELECT the MOST FAVORABLE RUNWAY (considering location of the likely windshear).
USE the WEATHER RADAR or PREDICTIVE WINDSHEAR SYSTEM �� before the takeoff
run, to ensure a flight path clear of any potential problem areas.
SELECT TOGA thrust.
CLOSELY MONITOR AIRSPEED and AIRSPEED TREND during the takeoff run to detect early
signs of windshear.
Applicable to: ,
�� Before TAKEOFF
DELAY TAKEOFF until conditions are improved.
"ASSESS CONDITIONS for a SAFE TAKEOFF by"
• Using observations and experience.
• Checking weather conditions.
SELECT the MOST FAVORABLE RUNWAY (considering location of the likely windshear).
USE the WEATHER RADAR before the takeoff run, to ensure a flight path clear of any potential
problem areas.
SELECT TOGA thrust.
CLOSELY MONITOR AIRSPEED and AIRSPEED TREND during the takeoff run to detect early
signs of windshear.
Applicable to: ALL
�� During APPROACH
DELAY LANDING or DIVERT to another airport until conditions are more favorable.
ASSESS CONDITION for a SAFE LANDING by :
• Using observations and experience.
• Checking weather conditions.
USE the WEATHER RADAR.
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
SUPPLEMENTARY PROCEDURES
ADVERSE WEATHER - OPERATIONS IN
WINDSHEAR OR DOWNBURST CONDITIONS
A330/A340 FLEET PRO-SUP-91-20 P 2/4
FCOM 19 AUG 10
SELECT the MOST FAVORABLE RUNWAY, in conjunction with the most appropriate runway
approach aid.
SELECT FLAPS 3.
USE MANAGED SPEED IN APPROACH PHASE.
CHECK both FDs ENGAGED IN ILS, FPA or V/S
ENGAGE AUTOPILOT, for more accurate approach and earlier information of beam deviation
when ILS available.
Note: It is using the GS mini function associated with managed ‐ speed, the system will carry
　
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