Warning Systems Flashcards
FIRE WARN (Red Lights)
Illuminated: Indicates a fire warning (or system test) in one or more of the following
- Engine
- APU
- main wheel well
- Cargo
Associated Aural Alarms include:
- fire warning bell
- if on ground, remote APU fire warning horn
Push - extinguishes both master FIRE WARN lights
- silences fire warning bell
- silences remote APU fire warning horn
- resets system for additional warnings
Note: pushing the fire warning bell cutout switch on overheat/fire protection panel results in the same action
MASTER CAUTION (yellow light)
Illuminated: a system annunciator light has illuminated
Push: extinguishes both MASTER CAUTION lights
- system annunciator lights extinguish
- resets system for additional master caution conditions
System Annunciator Panel
illuminated: An amber light, relating to illuminated system annunciator, has illuminated on forward overhead, aft overhead, or overheat/fire protection panel
To extinguish - push either MASTER CAUTION light
To recall - push and release either system annunciator panel
- if a master caution condition exists, appropriate system annunciators and MASTER CAUTION lights illuminate
- a single fault in certain redundant systems, or some simple faults, cause the system annunciator light to illuminate during a recall. The system annunciator light will extinguish when the MASTER CAUTION light is pushed
PSEU (Proximity Switch Electronic Unit light)
Illuminated:
On The Ground
- a fault is detected in the PSEU
- or the main cargo door micro switches or proximity switches have failed giving false door position indications during a Master Caution recall
In Flight
- inhibited from thrust lever advance for T/O until 30 seconds after landing
Takeoff Configuration Warning Light
Illuminated (red)
- activates on the ground as the throttles are advanced if the airplane is not configured correctly for takeoff
- activation is simultaneous with aural warning intermittent horn for TAKEOFF CONFIGURATION alert
Cabin Altitude Warning Light
Illuminated (red)
- illuminates when cabin altitude exceeds 10,000ft
- activation is simultaneous with aural warning intermittent horn for CABIN ALTITUDE alert
- extinguishes when cabin altitude descends below 10,000ft
MACH AIRSPEED WARNING TEST (switches)
Push: tests respective mach/airspeed warning system
- clacker sounds
- inhibited while airborne
STALL WARNING TEST (switches)
PUSH:
on ground with AC power available: Each test switch tests its respective stall management yaw damper (SMYD) computer.
No.1 SMYD = captains
No.2 SMYD = FO’s
Note: inhibited while airborne
Landing Gear Warning Cutout Switch
Push:
silences landing gear configuration warning aural indication at flaps up through 10 and above 200ft RA
Note: the aural indication cannot be silenced with the cutout switch at flaps greater than 10
BELOW G/S (light)
Illuminated (amber): below G/S alert is active
Push: inhibits ground prox G/S alert when below 1,000ft radio altitude
GPWS INOP (light)
Illuminated: GPWS computer malfunction or power loss
- Invalid inputs are being received from RA, ADIRU, ILS receiver, IRS, FMC, stall management computers, or EFIS control panel
What color warning lights require immediate attention of the flight crew?
Red: Engine, Wheel well, cargo, APU fire; autopilot, autothrottle;
Conditions that require timely attention of the flight crew are what colors?
AMBER
Blue lights indicate what to the flight crew?
electrical power availability, valve position, equipment status, F/A or ground communications
How can the crew manually activate the Main Deck Flashing lights?
select the fasten seat belts lights to on
