Windshear Flashcards
Which radar tests PWS?
Radar #1
PWS works below _______ feet?
1200’
Essentially on takeoff before lever climb and inside of 4nm final.
If PWS switch is in auto position, will you get PWS indications on the ground?
Yes
When does PWS work on the ground?
Radar on – immediately if PWS is in auto
Radar off – when acceleration is sensed at beginning of takeoff roll
When is PWS available on takeoff roll?
From beginning of takeoff roll to 100 knots, then inhibited until just after liftoff (50’).
What does “PWS Scan” mean if displayed on ND?
Means radar is off but radar has been automatically activated for windshear detection. (verify)
Radar scan
Normal – +/- 90 degrees
Descend through 2300’ – shrinks to +/- 60 degrees
Identify windshear – +/- 30 degrees
How far ahead does PWS detect and display windshear?
5 nm
If you hear an aural PWS caution, the windshear is within ____ nm?
3 nm
PWS differentiates by intensity or position?
Position, nothing to do with intensity.
PWS displays windshear on the _____? It must be in ___ nm scale to display the windshear. If it is not, it will prompt the pilot to reduce range with “_______ _____” on the ND.
ND
10nm
Red or amber “W/S SET RNG 10 NM”
On approach, a PWS warning will be displayed as a caution if aircraft is below ____’ AGL?
370’
On approach, “Go around, Windshear ahead!” is replaced by “______ _____ _____” if location is estimated to be beyond the ________point.
Monitor Radar Display
Touchdown
PWS has aural priority over ______, ________, or _____ ___ __________.
__________ and _______ ___________ have priority over PWS.
TCAS, GPWS, other FWC warnings
Windshear, stall warning
Things that make it through Takeoff Inhibit?
FFOR SEF
Engine Failure Engine Fire Engine Oil Pressure (verify) Reverser Unlocked/Pressurized Side Stick Fault (L or R) L+R Elevator Fault FWC 1+2 Fault
What visual indication of PWS windshear warning?
Red “Windshear Ahead” on PFD
Red & black crosshatched block at appropriate range on ND with amber azimuth bars showing left/right orientation
What is aural indication of a PWS windshear warning?
Takeoff environment – “Windshear ahead, windshear ahead”
What visual indication of PWS windshear caution?
Amber “Windshear Ahead” on PFD
Red & black crosshatched block at appropriate range on ND with amber azimuth bars showing left/right orientation
What is aural indication of a PWS windshear caution?
“Monitor radar display”
What part of FMGEC provides reactive windshear detection?
E = envelope
Below what altitude does reactive windshear detection work?
1300’ AGL
When is reactive windshear inhibited?
Below 50’ on landing
With what flap configuration is reactive windshear available?
Config 1 or greater
What triggers a reactive windshear warning?
If the angle of attack plus a factor for gusts and windshears reaches a threshhold value (as detected by the Envelope computer)
