15. Warning Systems Flashcards
(47 cards)
1
Q
PSEU Light
A
- Also illuminates for overwing exit flight lock fails to disengage when commanded,
- Inhibited from Thrust Lever advance for T/O until 30s after landing
- For some aircrafts acts also with “Simple Fault” logic,
- In this case illuminates after landing, extinguishes after Parking Brake SET or both engines shutdown
2
Q
MACH AIRSPEED AND STALL WARNING TEST Switches Inhibit
A
While airborne
3
Q
Landing Gear Warning Cutout Switch
A
Cannot be silenced with Flaps > 10
4
Q
Current Altitude Alert
A
- White box shows around current altitude display becomes bold,
- Between 900-300FT before reaching the selected altitude,
- The box turns amber and flashes for 300-900FT deviation from the selected altitude
5
Q
BELOW G/S P-INHIBIT Light
A
If pushed below 1000FT RA, inhibits Ground Proximity GLIDESLOPE alert
6
Q
GRD PROX INOP Light
A
- GPWS computer malfunction or power loss,
- Invalid signals received from: RA, ADIRU, ILS, IRS, FMC, SMYD computers or EFIS panel
7
Q
TERR INHIBIT Switch
A
Inhibits Look-Ahead terrain alerts and terrain display
8
Q
RUNWAY INOP Light
A
- RAAS failure,
- GPS position accuracy is inadequate,
- The airport is not in the GPWS database,
- The airport is not in the RAAS RWY database
9
Q
Terrain Display Color Codes
A
- Dotted Green: 2000FT below to 500Ft (250FT with gear down) below the aircraft,
- Dotted Amber: 500Ft (250FT with gear down) below to 2000FT above the aircraft,
- Dotted Magenta: No terrain data available,
- Solid Red: Look-Ahead warning is active,
- Solid Amber: Look-Ahead caution is active,
- Solid Green: Highest elevation
10
Q
Terrain Inhibit Near Airport
A
Within 200/400FT of nearest airport RWY elevation does not show
11
Q
Predictive Windshear Auto Pop-up
A
- Even neither pilot has WXR display selected,
- In Expanded Modes and Center Map Mode,
- If TERRAIN selected, WXR replaces it
12
Q
Sound Alerts
A
- Clacker for airspeed,
- Warning tone for A/P disengagement,
- Intermittent horn for Takeoff Config and Cabin Altitude,
- Steady Horn for Landing Gear positions,
- Warning Bell for Fire
13
Q
Warning Light Colors
A
- RED: Requires immediate attention,
- AMBER: Requires timely attention,
- BLUE: System information
14
Q
Importance of MASTER CAUTION or FIRE RESET
A
Resets the system for future warnings
15
Q
MASTER CAUTION Associated Area
A
Outside the normal field of vision of the flight crew
16
Q
Simple Fault
A
- Single fault in certain redundant systems,
- Does not illuminate MASTER CAUTION,
- Stored in the system and illuinate during Recall, extinguishes after RESET
17
Q
MASTER CAUTION Lights and Recall
A
All 12 lights must be illuminated
18
Q
MASTER CAUTION OVERHEAD Unusual Lights
A
- EQUIP COOLING-OFF,
- EMER EXIT LIGHTS-NOT ARMED
19
Q
Takeoff Configuration Warning
A
- Trailing Edge Flaps not in the range of 1-25,
- Trailing Edge Flaps are in Skew or Asymmetry or have Uncommanded Motion,
- Leading Edge Devices not configured for takeoff or have Uncommanded Motion,
- SPEED BRAKE Lever not in the DOWN position,
- Spoiler Control Valve is open, providing pressure to Ground Spoiler Interlock Valve,
- Parking Brake is SET,
- Stabilizer Trim not set in the takeoff range
20
Q
Landing Gear Horn Activation
A
Flaps Up to Flaps 10:
- Below 800FT, either Thrust Levers between IDLE and 20 degrees,
- OEI Thrust Lever < 34 degrees,
- Can be silenced until 200FT RA
Flaps 15 to 25:
- Either Thrust Lever < 20 degrees (or 34 for OEI),
- Cannot be silenced
Flaps greater than 25:
- Regardless of Thrust Lever position,
- Cannot be silenced
21
Q
PSEU System Monitors
A
Proximity Switch Electronic Unit monitors:
- Takeoff Configuration Warnings,
- Landing Configurations Warnings,
- Landing Gear,
- Air/Ground sensing
22
Q
Stall Warning Purpose
A
- Natural Stall Warning (buffet) usually occurs at a speed prior to stall,
- In some configurations the margin between stall and natural stall warning is less than desired,
- Therefore an artificial Stall Warning Device, a Stick Shaker is used to provide the required warning
23
Q
SMYD and Sources
A
Stall Management and Yaw Damper computers takes data from:
- Alpha Vane AoA outputs,
- ADIRU outputs,
- Anti-ice controls,
- Wing configurations,
- Air/Ground sensing,
- Thrust
24
Q
SMYD Outputs
A
- Stick Shaker and Pitch Limit Indicator,
- Airspeed displays,
- GPWS Windshear detection and alert
25
Altitude Alert Inhibit
- Flaps 25 or greater or,
- G/S captured
26
GPWS Inputs
- Radio Altitude,
- Barometric Altitude,
- Airspeed,
- Glideslope deviation,
- Airplane configuration
27
GPWS Alerts
Radio Altitude based alerts:
- Excessive Descent Rate,
- Excessive Terrain Closure Rate,
- Altitude Loss after Takeoff or Go-around,
- Unsafe Terrain Clearance when not in the landing configuration,
- Excessive deviation below ILS/GLS Glideslope or the FMC generated flight path angle
Look-Ahead Terrain Alerts:
- In addition to GPWS, EGPWS monitors terrain proximity,
- Using an internal worldwide terrain database
28
Warning Authority
- Actual Windshear warning,
- GPWS,
- Predictive Windshear,
- TCAS
29
Look-Ahead Terrain Alerts
- EGPWS contains detailed terrain data near major airports,
- And data in lesser detail for areas between airports,
- Terrain within 200FT of aircraft barometric altitude shows on the ND,
- Generated from database in the EGPWS computer and correlated to GPS position,
- Alerts based on aircraft: Position, Barometric Altitude, Vertical Flight Path and Ground Speed
30
GPWS Warnings/Cautions
- TERRAIN TERRAIN/OBSTACLE OBSTACLE, PULL UP: 20-30s to projected impact,
- CAUTION TERRAIN/OBSTACLE: 40-60s to projected impact,
- TOO LOW TERRAIN: Descent below unsafe altitude while too far from database airports, may follow DON'T SINK,
- TERRAIN: Excessive terrain closure rate,
- PULL UP: Follows SINK RATE and changes to TERRAIN,
- DON'T SINK: Excessive altitude loss after Takeoff or Go-around,
- SINK RATE: Excessive descent rate,
- TOO LOW, FLAPS/GEAR: Unsafe terrain clearance at low speed without correct configuration
31
RAAS Operation Requirements
- Terrain and airport runway database is in the GPWS computer,
- Aircraft approaching an airport in the RAAS database,
- GPS and other required signals are available and accuracy meets minimum requirements,
32
RAAS AAL Algorithm
- Numerically subtracts the landing runway touchdown zone elevation in the GPWS,
- From the pressure altitude of the aircraft
33
"APPROACHING XX" RAAS Advisory
Inflight:
- Between 750-300FT AAL and,
- Within 3NM of the approach end of the RWY and,
- Track within 20 degrees of the RWY HDG and,
- Laterally within 200FT of the RWY centerline + RWY width
On the ground:
- Groundspeed < 40KT and,
- Within specific distance from the RWY
34
"APPROACHING SHORT XX" RAAS Advisory
- Same as normal call except for RWY length < 1900m,
- And shown in amber
35
"ON XX" RAAS Advisory
- On RWY and,
- Heading within 20 degrees of RWY heading,
- Heard twice when aircraft along distance change is < 100FT within 180s
36
Unstable Approach RAAS Cautions
- "FLAPS FLAPS",
- "TOO HIGH, TOO HIGH",
- "TOO FAST, TOO FAST",
- "UNSTABLE, UNSTABLE",
- "LONG LANDING, LONG LANDING",
- "CAUTION TAXIWAY, CAUTION TAXIWAY"
37
GPWS Windshear Alert
- Two tone siren followed by "WINDSHEAR X 3",
- Red WINDSHEAR on both Attitude Indicators,
- Begins at rotation an enabled below 1500FT RA
38
Predictive Windshear Alerts
- All enabled below 1200FT RA,
-"WINDSHEAR AHEAD": During Takeoff,
-"GO AROUND, WINDSHEAR AHEAD": Within 1.5NM ahead of aircraft during approach,
-"MONITOR RADAR DISPLAY": Within 3NM during approach and takeoff,
- Except MONITOR, Red WINDSHEAR shown on both Attitude Indicators and NDs,
- For MONITOR RADAR DISPLAY: Windshear symbol and amber WINDSHEAR shown on ND
39
Predictive Windshear Automatic Scan
- Thrust Levers set for takeoff (even engine is off and IRSs not aligned for some aircrafts) or,
- Inflight below 2300FT (1800FT for some aircraft) RA,
- Alerts available approximately 12s after scan begins
40
Predictive Windshear Scan Area
- 25 degrees left and right,
- 3NM long,
- Warning zone: 0.5NM beam width, Up to 3NM length on the ground and 1.5NM inflight
41
Predictive Windshear Inhibits
- New Cautions inhibited between 80KT and 400FT RA,
- New Warnings inhibited between 100KT and 50FT RA
42
GPWS RA Callouts
- For some aircraft 500 and 1000 callouts are barometric based,
- Triggered by the difference between barometric altitude and landing field elevation
43
Smart 500 RA Callout
- Used during non-ILS or non-GLS approach,
- Also during ILS approach with excessive deviation (2 dots of LOC or G/S),
- Used when G/S cancel is selected,
- Used also when Backcourse Approach is detected
44
DH/MDA Callout Source
CPTs Minimums selector
45
TCAS General
- Traffic Alert and Collision Avoidance System,
- No protection against the aircrafts which do not have operating transponders,
- Identifies 3D airspace around the aircraft,
- Dimensions based upon closure rate with the conflicting traffic
- Independent of Ground-based ATC
46
TCAS Advisories
- TA: "TRAFFIC TRAFFIC", 40s to closest approach point, red square,
- RA: 25s to closest approach point, amber circle,
- Proximate traffic: Within 6NM and 1200FT, solid white diamond,
- Other traffic: Beyond proximate criteria, empty white diamond
47
TCAS Inhibits
-"INCREASE DESCENT": Below 1500FT RA,
-"DESCEND": Below 1100FT RA,
- RAs inhibited below 1000FT RA, changes to TA ONLY mode,
- All voice advisories inhibited below 500FT RA
