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
What does the PSEU monitor?
- Takeoff config warnings
- landing config warning
- landing gear
- air/ground sensing
When will the T/O config warning sound ?
- trailing edge flaps are not in the flaps 1 through 25 range or
- trailing edge flaps are in a skew or aysmmetry condition, or have uncommanded motion, or
- leading edge devices are not configured for takeoff or have uncommanded motion
- speed brake lever is not in the down position or
- spoiler control is open providing pressurized hydraulic fluid to the ground spoiler interlock valve, or
- parking brake is set or
- stabilizer trim is not set in the takeoff range
When will you get a landing gear AURAL indication
Flaps up through - 10
- ALT below 800RA, 1 engine inop and other thrust lever less than 34%
- The landing gear warning horn can be silenced
Flaps 15 - 25
- either forward thrust lever set below approx 20 degrees, or
- an engine not operating and the other thrust lever is than 34 degrees
- the landing gear warning horn cannot be silenced
Flaps greater than 25
- regardless of forward thrust lever position. the landing gear horn cannot be silenced.
System Annunciators (left side (capt))
FLT CONT: Low quantity, low pressure, feel diff press, speed trim fail, mach trim fail, auto slat fail, yaw damper, STBY RUD ON
IRS: Fault, On DC, DC FAIL, GPS
FUEL: Low pressure, Filter Bypass
ELEC: Drive, Standby Pwr OFF, Transfer Bus Off, Source Off, TR unit, BAT discharge, Elec
APU: Low Oil Pressure, Fault, Overspeed
OVHT/DET: Engine 1 Overheat, Engine 2 Overheat, APU Det/Inop
System Annunciators (right side)
ANTI-ICE: Window Overheat, Probe Heat, Cowl Anti-ice
HYD: Overheat, Low Pressure
DOORS: FWD entry, Equip, FWD/AFT cargo, FWD service , LEFT/RIGHT overwing, Main Cargo
ENG: Reverser, EEC ALTN Mode, Engine Control
OVERHEAD: Equip Cooling-Off, Emer Exit Lights-NOT ARMED, Flight recorder-OFF, Pass Oxy-ON, PSEU, ELT
AIR COND: Dual Bleed, Wing-Body Overheat, Bleed Trip Off, Auto Fail, Off Sched Descent, Zone Temp, Pack
