4. Flight Warning System Flashcards
What is the function of the FWC?
It processes failure conditions and aircraft systems data into visual and aural alerts, procedures and status messages.
What warnings are not processed by the FWC?
- stall warnings
- GPWS warnings
- windshear warnings
What visual alerts are presented?
- Master Warning Lights (MWL)
- Master Caution Lights (MCL)
- Auto-land Caution Lights
- Local Lights
- Multi Function Display System (MFDS)
- Engine alerts - light in appropriate fuel lever
- Engine Fire - light in fire handle
How are aural alerts presented and what can they be?
- presented via flight deck speakers and headsets
1. cavalry charge = auto pilot disconnect
2. whooler = trim
3. clacker = overspeed warning
4. C chord = altitude alert
5. Buzzer = cabin call
What is the function of the SAP?
automatic backup in case FWC fails completely
SAP comes on automatically
Define level 3 alert?
- Requires immediate corrective or compensatory action
- Repetetive triple chime
- Master Warning Light (MWL)
- MFDU Alert Message in red
Define level 2 alert?
- requires immediate awarenes and subsequent corrective or compensatory action
- double chime
- 2 flashing amber Master Caution Lights (MCL)
- local amber light
- MFDU alert message in amber
Define level 1 alert?
- requires pilot awareness
- single chime
- MFDU alert message in amber
- and/or local light
How are visual alerts on the MFDU cancelled?
- fault is corrected
- relevent Master Light is pressed
Which level 3 annunciations are not cancelled in the normal way?
- Landing Gear not Down (flap 23 or more)
- Take off config alerts
These alerts cannot be cancelled until the condition is corrected.
What is the function of the AUTO LAND caution lights?
alert regarding failures during and involving automatic landings
When are local lights cancelled?
- when the fault is corrected
- affected push button is pressed
Which lights can be dimmed by the brightness selector?
- Master Warning Light
- Master Caution Light
- Auto Land caution lights
on which display units is FWC information presented?
Multi Function Display Units (2 x MFDU’s)
Left MFDU = Primary engine instruments, Alerts, Memos (blue)
Right MFDU = Secondary engine parameters, procedures, status messages, APU
What happens automatically if a display unit fails?
Left DU fails = primary page displayed automatically on Right DU
Secondary Page can be displayed by pressing the transfer button.
However, the secondary Page cannot be displayed if an alert concerning a primary engine parameter is displayed