FCOM : B747 EXAM QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS VERIFIED
Turbulence Penetration Airspeed/Mach
Turbulent air penetration speed is: 290 KIAS/0.82M to 310 KIAS/0.85M, whichever is
lower. Severe turbulence will cause large and often rapid variations in IAS. DO NOT
CHASE THE AIRSPEED.
Is this speed an AFM Limitation?
No, this is not an AFM limitations, but are provided for Flight Crew information.
OEB-OEJ. Continuous ignition must be on when operating in?
moderate to heavy rain
• hail or sleet
• moderate to severe turbulence
• volcanic ash
• when entering icing conditions
Is continuous ignition automatically turned on when NAI is turned ON, either
manually or via the automatic detection system (as installed), or must it be
manually selected on?
It is automatically turned ON.
If if continuous ignition is not available, what can be used instead?
Standby Ignition
What is displayed on the EICAS confirming that Continuous Ignition is ON?
CON IGNITION ON memo message is displayed.
, What is the top part (-40˚C) of a CB known as?
The "wet top" or "radar top".
Is turbulence possible in this and the clear air above the visible portion of the
cloud?
Yes, particularly in vigorously building cloud.
OEB-OED, OJA-OJU
WX-T mode should be used for all normal flight conditions. What range is the
turbulence detection feature operational in?
40nm or less. (50nm of less, so select 40nm)
Using MAX Gain on the wx radar is the recommended setting for detecting what?
Areas of low reflectivity such as ice crystals where turbulence is possible.
OEB-OEJ : moderate to sever turbulence.
Continuous Ignition switch...ON
When MUST a PA be made from the flight deck?
Any time the "Seat Belts signs are illuminated for turbulence.
What are the 3 types of turbulence situations?
1. Anticipated,
2. Unanticipated light turbulence,
3. Unanticipated turbulence - Immediate Safety Hazard.
How do the different turbulence situations differ?
For anticipated and unanticipated light turbulence, the PA
"All passengers and crew be seated and fasten seat belts" is sufficient.
COMPLETE SOLUTIONS VERIFIED
Turbulence Penetration Airspeed/Mach
Turbulent air penetration speed is: 290 KIAS/0.82M to 310 KIAS/0.85M, whichever is
lower. Severe turbulence will cause large and often rapid variations in IAS. DO NOT
CHASE THE AIRSPEED.
Is this speed an AFM Limitation?
No, this is not an AFM limitations, but are provided for Flight Crew information.
OEB-OEJ. Continuous ignition must be on when operating in?
moderate to heavy rain
• hail or sleet
• moderate to severe turbulence
• volcanic ash
• when entering icing conditions
Is continuous ignition automatically turned on when NAI is turned ON, either
manually or via the automatic detection system (as installed), or must it be
manually selected on?
It is automatically turned ON.
If if continuous ignition is not available, what can be used instead?
Standby Ignition
What is displayed on the EICAS confirming that Continuous Ignition is ON?
CON IGNITION ON memo message is displayed.
, What is the top part (-40˚C) of a CB known as?
The "wet top" or "radar top".
Is turbulence possible in this and the clear air above the visible portion of the
cloud?
Yes, particularly in vigorously building cloud.
OEB-OED, OJA-OJU
WX-T mode should be used for all normal flight conditions. What range is the
turbulence detection feature operational in?
40nm or less. (50nm of less, so select 40nm)
Using MAX Gain on the wx radar is the recommended setting for detecting what?
Areas of low reflectivity such as ice crystals where turbulence is possible.
OEB-OEJ : moderate to sever turbulence.
Continuous Ignition switch...ON
When MUST a PA be made from the flight deck?
Any time the "Seat Belts signs are illuminated for turbulence.
What are the 3 types of turbulence situations?
1. Anticipated,
2. Unanticipated light turbulence,
3. Unanticipated turbulence - Immediate Safety Hazard.
How do the different turbulence situations differ?
For anticipated and unanticipated light turbulence, the PA
"All passengers and crew be seated and fasten seat belts" is sufficient.
