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ATR > Crew Alerting System > Flashcards

Crew Alerting System Flashcards

1
Q

What does the CCAS provide?

A
  • Warnings
  • Malfunctions
  • Abnormal situations
  • Flight envelope deviations
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2
Q

What is the design principle?

A

Lights out

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3
Q

Where will an MFC failure be indicated?

A

On the CAP

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4
Q

How will crew get alerts in case of an MFC failure?

A

Crew will have to monitor for local alerts

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5
Q

What systems are only associated with CAP alerts?

A
  • parking brake
  • GPWS fault
  • maintenance panel

Can only be extinguished by corrective action

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6
Q

What is the alerting process?

A

1 - fault is detected by MFC and crew are notified by aural and visual alerts
2 - crew checks CAP to check which systems are affected
3 - crew finds pb for faulted system and takes appropriate action

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7
Q

What alerts are not processed by the MFC?

A
  • engine fire
  • excess cabin differential pressure
  • excess cabin altitude
  • nacelle 2 overheat
  • smoke

local alerts only

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8
Q

What is a Level 0 alert?

A

Notify crew of situations not abnormal but of temporary nature

Blue, green or white lights

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9
Q

What is a Level 1 alert?

A

Take place without CCAS activation

Signal the degradation of a system or a loss of redundancy

Local amber alert without chime

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9
Q

What is a Level 2 alert?

A

Cautions

Yellow master caution

Single chime aural alert

Amber alert on CAP

Does not require immediate action (QRH)

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10
Q

What is a Level 3 alert?

A

Warnings

Red master warning

CRC

Red light on CAP

Immediate corrective action required

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11
Q

How are the CAP bulbs tested?

A

Two bulbs each

Tested with the annunciator light test switch during pre-flight

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12
Q

What does the RCL button do?

A

Bring back any existing faults that were previously cleared with CLR button

Performed during descent and app phase

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13
Q

What does the CLR button do?

A

Extinguish any amber CAP lights and reset MFC for that system

If CAP not cleared after a fault, crew will not be alerted to a subsequent fault of that system

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14
Q

What does the TO INHI button do?

A

Inhibits CCAS alerts for non emergency conditions during take off roll

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15
Q

What Level 3 warnings are inhibited by the TO INHI?

A

Smoke warnings and engine oil

16
Q

When is the to inhibit cancelled?

A
  • when landing gear unlocks for retraction
  • recall button pressed
17
Q

How are nuisance alerts cancelled?

A

The emergency cancel toggle switch

Affected system will not provide another warning unless:

  • MFC reset by cycling aircraft power
  • MFC 1B/2B is reset
  • Recall pb is pressed
  • To config test
18
Q

Excluded warnings from emergency cancel?

A
  • landing gear not down CRC
  • Vmo/Vfe/Vle overspeed clacker
  • stall warning cricket
  • pitch trim whooler
  • ap disengaged
19
Q

Excluded warnings from emergency cancel?

A
  • landing gear not down CRC
  • Vmo/Vfe/Vle overspeed clacker
  • stall warning cricket
  • pitch trim whooler
  • ap disengaged
20
Q

What does the to config test?

A
  • flaps in to position
  • pitch trim in the green arc
  • aileron lock is disengaged
  • pwr mgt is in to position
  • travel limiting unit is in the LO SPD config
21
Q

What will happen if to config test is incorrect?

A
  • master warning will flash
  • CRC
  • CONFIG will illuminate on the CAP
  • FLT CTL will illuminate if pitch, trim or flap are not correctly positioned or if AIL LOCK is illuminated
  • ENG will illuminate if the pwr mgt knob is not in take off position
22
Q

What alerts will you get if MFC 1B and 2B fail?

A
  • Master caution lights will illuminate with no aural warnings
  • MFC annunciated on CAP
  • MFC 1B and 2B fault lights on overhead panel
23
Q

What alerts will you NOT get with MFC 1B and 2B failure?

A
  • All level 2 alerts
  • Level 3 - configuration, eng oil, prop brk,
  • Rest of level 3s will only be processed by the CAP (no master warning or CRC)
24
Q

What triggers an altitude alert?

A

When ac approaches 1000ft of the target altitude selected on ADU

Signals entering 250ft capture zone

25
Q

When do you get an overspeed alert Vle?

A

180 kt

26
Q

When will you get an overspeed alert Vfe?

A

Flaps 15 - 180kt
Flaps 30 - 145kt

27
Q

When will you get the pitch trim alert?

A

When the pitch trim is in motion for more than 1 sec

28
Q

How are stall warnings detected?

A

By AoA probes

CCAS will produce aural alert and MFC will activate the stick shaker

MFC will activate stick pusher - operational as long as any two MFCs are working

29
Q

When is normal stall warning?

A

10.9 degrees AoA in non icing

30
Q

When is stall warning in icing conditions?

A

Between 7.7 and 8.4 degrees AoA in Cruise depending on flap position

8.4 degrees within ten minutes of take off or until flaps are retracted

31
Q

When are the stall alarm and stick pusher inhibited?

A

When the aircraft is on the ground

32
Q

When does stick pusher triggering occur?

A

Between 10.6 and 14.3 degrees, depending on power setting, flaps and horn anti ice selection

33
Q

When is stick pusher activation inhibited?

A

During first 10 seconds after lift off and within 500 ft of the ground (provided RA working)

ATR (24 decks)

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