Warning Systems Flashcards
Master warning light
Time critical warning
Flap ovrd switch
Inhibits
GPWS too low flaps and
too low terrain caution
EICAS advisory message GND PROX SYST
If selected for more than 60 sec at speed 250 kts or greater
Ground proximity Gear override
Inhibits
Too low gear caution
Too low terrain caution
Landing config siren
Advisory message GND PROX SyS
If selected for more than 60 sec with speed greater than 290 kts
GND PROX G/S inhibit
Inhibits GS caution below 1000’
Enables GPWS voice callout 500 ra JA604A and after F and BCF
GND PROX light
GPWS caution exists
Enhanced GPWS lookahead caution exists.
PULL UP light
Descent rate severe
Closure rate with landing gear and flaps not on landing config
Enhanced GPWS look ahead warning exists
Terrain display
Dotted green
- 2000 below to 500 above (250)
Dotted amber
- 500 below (250) to 2000 above
Dotted red
- 2000 above
Dotted magenta
- no terrain available
Solid red
- terrain warning active
Solid amber
- terrain caution active
Terrain red
Terrain warning
20-30 sec from projected impact
Terrain amber
Terrain caution
40-60 sec from projected impact
Terrain display automatically
A look ahead alert occurs and
- Terrain Display switch is not selected and
- HSI Mode selector in VOR, APP, MAP or CTR MAP
Predictive windshear symbol displays automatically when
The aircraft is below 1200ft
A PWS alert occurs
WXR display switch not selected by either p
HSI mode in VOR, APP, MAP or CTR MAP
WXR radar display replace terr display if no active warning
System alert messages
Associated with system failures or faults that may require performance of a non normal procedure or affect the way the crew operate the airplane
Four categories
Time critical warning
Warning
Caution
Advisory
System alert messages not associated with aircraft system failures but affect the way the crew operate
Configuration Airspeed Altitude Windshear GPWS TCAS Communication FMC messages
Definition
Time critical warning
Non normal condition requiring immediate crew awareness and corrective action to maintain safe flight. Master warning light Voice alerts ADI indications Stick shakers
Definition
Warning
Non normal operational or system condition requiring immediate crew awareness and corrective action
Definition
Caution
Non normal operational or system condition requiring immediate crew awareness,corrective action may be needed.
Pushing either master caution/warning reset switch silences the warning and fire bell except
Landing config
Autopilot disconnect
Takeoff config
Some aircraft over speed.
Engine start message inhibited from engine start switch engagement until
- engine reaches idle
- start is aborted
- 2min elapsed
Start messages not inhibited
- eng fuel val
- Eng shutdown
- Eng starter
- starter cutout
Warning inhibits
From nose gear extension during rotation to
400ft or 20 sec
If fire occurs during inhibit, EICAS mess, but no fire bell and MW lights.
If condition still exists after inhibit, fire bell and MW light illuminate.
Caution inhibits
80kts until
-400ft or 20 sec,
Advisory inhibits
From thrust set for takeoff until
400ft or 30 sec
Data link lost
Windshear system
Communication inhibits
Thrust set for TO
Till
400ft or 20 sec
Landing inhibits
EICAS comm alert, selcal, ACARS, ATC, PRINTER
Not cabin alert although chime is inhibited
Begins 800ft until
Less than 75 kts or
900ft in Missed approach.
Shutdown inhibits
Eng anti ice Eng bleed off Gen drive Gen off Eng oil press Hyd prim pump Eng control
Alt alert inhibit
Gear down and locked
Takeoff config alert
Leading edge slats not in takeoff Trailing edge flaps not in takeoff Slat/flap position disagree with lever Stab trim outside of green band C2B6 nose up only Speedbraie bit in down detention Parking brake valve closed
Landing config warning
In flight
Any landing gear not down and locked
Flaps in landing position or RA below 800 ft
Stick nudger
If flaps are in the retracted position and the a of a continues to increase, control column nudger moves control column forward.
GPWS
Provides time-critical alerts for potentially hazardous flight conditions involving imminent impact with the ground
Voice call outs for situational awareness
Windshear
Inputs from
ADC IRS ILS RA GPS
GPWS modes
- Excessive descent rate
- Excessive terrain closure rate
- Alt loss after takeoff or go-around
- Unsafe terrain clearance while not on landing configuration
- GS deviation
- Height callout and bank angle
- Windshear
Enhanced GPWS
Look ahead terrain awareness.
Compare airplane geographic position and altitude against an internal terrain database to predict and display potential conflict with terrain.
Requires inputs from GPS
GPWS priority
Windshear Mode 1 Mode 2 Look ahead terrain warning Look ahead obstacle warning Mode 2 caution Look ahead terrain caution Look ahead obstacle caution Mode 4 Mode 6 Mode 4 G Mode 4 F Sink rate caution mode 1 Sink rate after takeoff mode 3 GS mode 5 Predictive windshear caution
Mode 1
Sink rate then
Pull up
Mode 2 excessive terrain closure
Mode 2 A- not in landing config
Warnings continue until 300’ gained
Mode 2 B- flaps in landing position
Pull up if no gear, otherwise only terrain
200-789 ft
Mode 3 Altitude loss after TO or GA
Greater than 150’, 25%
Dont sink aural replaced by too low terrain
Arms below 245’, active when gear or flaps raised.
Effective between 30 and 1330 ft
Caution when alt loss =10% of RA
Mode 4
Mode 4 A
Below 190 kts -too low gear-too low terrain
Mode4 B
Below 159 kts- too low flaps- too low terrain
Mode 5 GS
More than 1.3 dots below
Below 1000’
Gear down
Kagoshima exception.
Below 1500’
Gear not applicable
RA
15-35 sec from closest approach.
TA
20-48 sec from closest approach
Proximate traffic
6nm
1200’
