C-27J TAWS & TCAS Flashcards
TAWS active from:
30 feet after takeoff until landing
TAWS warnings cannot be canceled, except:
GLIDE SLOPE and TOO LOW FLAPS (by pressing HUSH button on either control wheel)
Once cancelled, will GLIDE SLOPE and TOO LOW FLAPS sound or appear again?
Only after the reset parameters are met (flying below 30 AGL or climbing through 1500 AGL)
Two TAWS Mission Modes:
NORMAL and TACTICAL (inhibits warning envelopes to allow more aggressive flight ops)
What triggers “BANK ANGLE” ?
Bank angle is greater than 61 degrees above 130 feet, reducing to 10 degrees at 30 feet or less
What triggers “GLIDE SLOPE (soft voice)” ?
Deviation below glide slope greater than 1.3 dots
What triggers “GLIDE SLOPE (loud voice)” ?
Deviation below glide slope greater than 2 dots
What condition triggers “TOO LOW FLAPS” ?
Gear is down, radalt is 245 feet or less, and airspeed is less than 159 knots
What condition triggers “ TOO LOW GEAR “ ?
Gear is UP, radalt is 400 feet or less, and airspeed is less than 150 knots
What is the TCAS basis of operation?
TCAS identifies nearby aircraft with operating transponders. Mode 3A are processed for lateral data, Mode 3A & C provide lateral and vertical data. Warnings are based on predicted flight paths.
What is the TCAS FORWARD airspace coverage?
40 nm (15 nm in high density area)
What is the TCAS ABEAM coverage area?
15 nm
What is the TCAS AFT coverage area?
12 nm
What is the TCAS VERTICAL coverage range?
+/- 9000 feet
What is the size of the TCAS “bubble” around the aircraft?
1200 feet
How many seconds out is a Traffic Advisory?
20 - 48 seconds
How many seconds out is a Resolution Advisory?
20 - 30 seconds
How many targets will TCAS track?
Up to 45 targets
How many targets will TCAS display?
Up to 30 targets to display, five on the PFD
Will ground targets be displayed?
No. In general, if the target is within 400 feet of the ground it will not be displayed
Under what conditions will ONLY Traffic Advisories be displayed? hint: there are four
- Cargo door/ramp open
- Paratroop door open
- TAWS alerts
- LPCR Windshear Alerts
Which has higher priority: TAWS or TCAS ?
TAWS In case of simultaneous alarm, TCAS is placed in TA ONLY mode
Symbol “White Diamond Outline (empty)”
Non Threat Aircraft = White Diamond Outline
Symbol “White Diamond Filled (solid)”
Proximate Aircraft - White Filled Diamond is within 6 nm and 1200 feet
Symbol “Yellow Filled Circle”
Traffic Advisory (TA) Yellow Filled Circle - Range/Closure rate warrants special attention. “TRAFFIC TRAFFIC” Aural Warning
Symbol “Red Filled Square”
Resolution Advisory (RA) Red Filled Square - Position/closure rate requires corrective or preventative action. Visual & Aural Vertical Guidance (CLIMB CLIMB CLIMB) and visual maneuvering advisory on Vertical Speed Indicator.
Plus + sign indicates?
Intruder above aircraft, data tag should include altitude in hundreds of feet
Vertical arrow to the right of the intruder indicates?
Vertical speed of the intruder is 500 feet or greater per min
What color is a Resolution ( RA ) ?
Resolutions are RED
TA MODE is what?
Traffic Advisory mode: range, bearing, and relative altitude. Provides awareness but does not issue Resolution Advisories.
RA MODE is what?
Resolution Advisory mode: TA information displayed, and will issue visual & audio Resolution Advisories for traffic determined a threat.
TCAS vertical display NORM provides?
NORM = from +2700 feet to -2700 feet
TCAS vertical display ABV provides?
ABV = from +8700 feet to -2700 feet
TCAS vertical display BLW provides?
BLW = from +2700 feet to -8700 feet
Maximum number of intruders displayed on PFD HSI?
Five intruders max at one time. RA’s take priority over TA’s
System will command what FPM climb or descent?
1500 - 2500 FPM climb or descent, adjust vertical speed to comply
What display on the HUD indicates safe area to fly to?
The “FLY-TO” box indicates safe area to fly to
