Warning Systems

Question 1

FIRE WARN (Red Lights)

Answer 1

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

Question 2

MASTER CAUTION (yellow light)

Answer 2

Illuminated: a system annunciator light has illuminated

Push: extinguishes both MASTER CAUTION lights

• system annunciator lights extinguish
• resets system for additional master caution conditions

Question 3

System Annunciator Panel

Answer 3

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

Question 4

PSEU (Proximity Switch Electronic Unit light)

Answer 4

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

Question 5

Takeoff Configuration Warning Light

Answer 5

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

Question 6

Cabin Altitude Warning Light

Answer 6

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

Question 7

MACH AIRSPEED WARNING TEST (switches)

Answer 7

Push: tests respective mach/airspeed warning system

• clacker sounds
• inhibited while airborne

Question 8

STALL WARNING TEST (switches)

Answer 8

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

Question 9

Landing Gear Warning Cutout Switch

Answer 9

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

Question 10

BELOW G/S (light)

Answer 10

Illuminated (amber): below G/S alert is active

Push: inhibits ground prox G/S alert when below 1,000ft radio altitude

Question 11

GPWS INOP (light)

Answer 11

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

Question 12

What color warning lights require immediate attention of the flight crew?

Answer 12

Red: Engine, Wheel well, cargo, APU fire; autopilot, autothrottle;

Question 13

Conditions that require timely attention of the flight crew are what colors?

Answer 13

AMBER

Question 14

Blue lights indicate what to the flight crew?

Answer 14

electrical power availability, valve position, equipment status, F/A or ground communications

Question 15

How can the crew manually activate the Main Deck Flashing lights?

Answer 15

select the fasten seat belts lights to on

Question 16

What does the PSEU monitor?

Answer 16

• Takeoff config warnings
• landing config warning
• landing gear
• air/ground sensing

Question 17

When will the T/O config warning sound ?

Answer 17

• 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

Question 18

When will you get a landing gear AURAL indication

Answer 18

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.

Question 19

System Annunciators (left side (capt))

Answer 19

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

Question 20

System Annunciators (right side)

Answer 20

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