Warning Systems Flashcards
Recall the conditions that will cause the intermittent takeoff configuration warning
- TE flaps are not in the flaps 1-25 takeoff range, or are in a skew or asymmetry condition, or have uncommanded motion
OR - LE devices are not configured for takeoff or uncommanded motion
OR - SPEE BRAKE lever is not in the DOWN position
OR - Spoiler control valve is open providing pressurized hydraulic fluid to the ground spoilers interlock valve
OR - Parking brake is set
OR - Stabilizer trim not set in the takeoff range (green band)
Describe the function of the stall warning system “stick shaker”
The stall warning “stick shaker” consists of two eccentric weight motors, one on each control column. They are designed to alert the pilots BEFORE a stall develops (it is an artificial stall warning device)
Note: the stall warning system is armed in flight at all times. The system is deactivated on the ground; two test switches are installed on the aft overhead panel
Describe the symbology and color represented by a TA and RA
TA: amber circle
RA: red square
Recall the purpose of the GPWS and the types of alerts it provides
GPWS provides immediate alerts for potentially hazardous flight conditions involving imminent impact with the ground
Note: alerts are for
- Excessive descent rate
- Excessive terrain closure rate
- Altitude loss after take-off or go-around
- Unsafe terrain clearance when not in the landing configuration
- Excessive deviation below an ILS glide path
- Excessive deviation below glide path
Recall when predictive windshear (PWS) alerts are automatically available on takeoff and approach
- Thrust levers set for takeoff (there’s a delay of several seconds for the WX radar to provide PWS alerts)
OR - In flight below 1200 ft RA
Note: PWS alerts can be enabled PRIOR to takeoff by pushing the EFIS control panel WXR switch
Describe the meaning of the terrain alerting colors displayed by the EGPWS, and how to display them on the ND
Terrain is displayed by selecting TERR on the EFIS control panel while in the MAP, center MAP, VOR , or APP modes:
- Dotted green: terrain is below the airplanes current altitude
- Dotted red or amber: represents terrain conflict
- Dotted magenta: no terrain data available
- Solid amber: look-ahead terrain caution active
- Solid red: look-ahead terrain warning active
Describe the indications of a windshear warning
- Two-tone siren followed by “WINDSHEAR”
- Red WINDSHEEAR on both attitude indicators
Describe the aircraft overspeed warning system
The Mach / airspeed warning consists of clackers that can be silenced only by reducing airspeed below Vmo/Mmo
Describe the indications of a PWS alert
PWS warning
On takeoff, windshear close to and directly ahead of the airplane:
- Aural “WINDSHEAR AHEAD”
- Red WINDSHEAR on both attitude indicators
- RED windshear symbol on ND
- Red WINDSHEAR message on ND
On approach, windshear within 1.5 nm and directly ahead of the airplane:
- Aural “GO AROUND, WINDSHEAR AHEAD”
- Red WINDSHEAR on both attitude indicators
- RED windshear symbol on ND
- Red WINDSHEAR message on ND
PWS caution
On takeoff or approach, windshear within 3 NM and ahead of the airplane:
- Aural “MONITOR RADAR DISPLAY”
- RED windshear symbol on ND
- Amber WINDSHEAR message on ND
- Amber WINDSHEAR msg
Describe the landing gear indicator lights and the landing gear configuration warning system
Visual indications and aural warning of landing gear position are provided by the landing gear indicator lights and landing hear warning horn
Landing gear indicator lights:
- Green light illuminated: landing gear is down and locked
- Red light illuminated:
- Landing gear is in disagreement with LANDING GEAR lever position
- Landing gear is not down and locked (with either, or both thrust levers retarded to idle and below 800 ft AGL
Landing gear warning horn:
A steady warning horn is provided to alert the flight crew whenever a landing is attempted and any gear is not down and locked
Recall the indications when approaching a MCP selected altitude
Selected altitude alert:
- A white box shows around the selected altitude display between 750 ft and 200 ft before reaching the selected altitude
Current altitude alert:
- The white box around the current altitude display becomes bold between 750 ft and 200 ft before reaching the selected altitude
Recall the indications when deviating from a MCP selected altitude
When deviating by more than 200 ft from a selected altitude, a momentary tone sounds and the current altitude box turns amber and begins to flash. The amber flashing continues until:
- altitude deviation becomes less than 200 ft
OR
- a new altitude is selected
Explain the meaning of a TERRAIN or OBSTACLE message on the ND
TERRAIN (amber): look ahead terrain caution alert active
TERRAIN (red): look ahead terrain warning alert active
OBSTACLE (amber): obstacle alert caution active
OBSTACLE (red): obstacle alert warning active
Note: obstacle alerts are provided for man-made obstacles 100’ or higher
Describe the TERR elevation display
Located on the lower left-hand corner of the ND. Displays elevation of highest and lowest terrain. The color of the elevation number corresponds to the terrain elevation:
- Green: terrain is below the airplanes current path
- Amber or Red: represents terrain conflict
Explain the meaning of the proximity switch electronic unit (PSEU) light
- A fault is detected in the PSEU
OR - An overwing exit flight lock fails to disengage when commanded
