Surveillance Flashcards
Range of R4000 Wx radar?
320nm
±80º laterally
±15º vertically
returns saved in a 3D image buffer
What is shown in ON PATH wx?
Below 6 000 ft
6 000 to 29 000 ft
Above 29 000 ft
Below 6 000 ft
4 000 ft below
Everything above up to 10 000 ft
6 000 to 29 000 ft
4000 ft above and below
** Above 29 000 ft**
4000 ft above
4000 ft below (lowered to 25 000 ft if convective wx about)
When is PWS active?
Range for warnings, cautions and display?
30kt-100kt / 50RA - 1800 RA (2300 ceo)
New system on whenever engine is on
Scans 5nm ahead
Warning: 0.25nm either side to 1.5nm
Caution 25° to 3 nm
Both to 1200 RA
Display 40° to 5nm - 1500 RA
How far is turbulence monitored?
Weather ahead envelope?
Distance, width, altitude?
When are visual and aural cautions inhibited?
Out to 60 nm
3 minutes ahead
2nm either side
4000 ft above and below
Red / yellow / turbulence
No cautions below 1500 ft
No shouty man below 2500 ft
PWS warning / caution range?
On TO / airborne above 50nm?
When is advisory only?
When are warnings downgraded?
TO up to 100 kt
Warning: 0.25 nm either side to 1.5 nm
Caution: ±25º to 3nm
No alerts above 100 kt until reaching 50 RA
Airborne above 50RA
Warning: 0.25 nm either side to 1.5nm
Caution: ±25º to 3 nm
Advisories only 1200 to 1500RA
Warnings downgraded on landing between 0.5 to 1.5 nm ahead below 370 RA
Five basic modes of GPWS?
- Excessive RoD- SINK RATE (+PU)
- Terr closure- TERRAIN (+PU)
- Sink after TO - DONT SINK
- Config TOO LOW FLAPS/GEAR/TERR
- Glideslope
Predictive GPWS
When does coverage start?
How far ahead does it extend?
When does AVOID TERRAIN
8-20 secs ahead (warning/caution)
1.5º either side
Caution 132 sec ahead
Warning 120 sec ahead (12 sec diff)
Avoid warning if terrain cannot be cleared with sufficient margin
What are the dimensions of the TAWS exclusion tunnel (runway convergence)
Exceptions?
2.6 to 8ºplane
Extends out approx 2.7 nm
TCAA flagged airports have custom tunnel
(Terrain Challenging Airport Area)
Difference between the FLAP MODE and LDG FLAP 3 pb?
Flap mode inhibits mode 4b
LDG FLAP 3 does not, but accepts Flap 3 as final config
Which mode can be cancelled by pressing the PULL UP - GPWS pb?
Mode 5 (glideslope) only
Can TERR ON ND come on automatically?
What terrain is shown?
When is TERR OFF shown in amber?
Is basic GPWS still active when the TERR pb is OFF?
Yes, if caution or warning is generated
Anything within 2000 ft of aircraft
If the TERR GPWS pb is OFF after TO CONFIG is pressed, or any airborne mode except 6 (↑1500 to ↓800 ft)
Yes, only disactivates TAWS / Predictive
When does ROW ROPS start computing?
When does ROW arm?
What is considered?
What is assumed?
2000 ft
400 ft
- Weight
- Config
- LDA
- Wind
- Dry/wet
- Failures
- 15% margin
- Max manual braking
- Idle reverse (for dry)
- Max reverse (for wet)
ROW
When does IF WET: RWY TOO SHORT show?
RWY TOO SHORT?
ROPs
Which warning has priority- braking or reverse?
When would you hear KEEP MAX REV?
When does ROPS deactivate?
Until 200 ft
After 200 ft
Max braking has priority
After 80kt
30kt
What are TCAS detection envelope?
What do THRT , ALL , ABV, BLW mean?
How many intruders shown at one time?
30nm either side
80nm ahead
9,900 ft above and below
THRT- only shows traffic if TA or RA
ALL- ± 2700 ft
ABV + 9900 ft, - 2700 ft
BLW - 9900 FT, + 2700 ft
Max 8 on ND
How many channels on TCAS computer? How many antennas?
How many transponders?
When are TCAS / Transponders used for interrogation?
When does TCAS STBY appear in amber?
One channel, two antennas
Two Mode S transponders
TCAS computer used to detect non-TCAS equipped traffic
ATC XPDR use for TCAS traffic
Flight phase 6 only
