Master Caution Annunciators

Question 1

ENG 1/2 FAIL (red)

Answer 1

N1 of indicated engine decayed below 65% with ECL in FLIGHT

Question 2

ENG 1/2 OIL PRESS LOW (red)

Answer 2

Engine oil pressure is below 15-19 psi

Question 3

ROTOR BRAKE ON (amber)

Answer 3

Rotor brake pressurized OR handle not stowed

Question 4

ENG 1/2 OIL LEVEL (amber)

Answer 4

Sufficient engine oil remaining for 2 hours of flight at normal consumption rates

Question 5

STEERING FAIL (amber)

Answer 5

Power steering electrical circuits failed OR steerable landing gear exceeded steering limits

Question 6

DOOR UNLOCKED (amber)

Answer 6

Cabin door is unlocked

Question 7

NO 1/2 DC ESS BUS (amber)

Answer 7

Electrical power to DC Essential Bus failed

Question 8

AFCS* (amber)

Answer 8

AFCS failure, refer to AFCS panel indicator for failed system and axis

Question 9

RAMP OPEN (amber)

Answer 9

Ramp is not locked

Question 10

ENG 1/2 XMSN HOT (amber)

Answer 10

Engine transmission temp above 205*C

Question 11

XMSN OIL HOT* (amber)

Answer 11

Oil in one of 5 transmissions above 140*C

Question 12

HEATER HOT (amber)

Answer 12

Temp in heater outlet exceeds 300*C

Question 13

L/R FUEL LOW (amber)

Answer 13

Fuel level in tank below 1200 pounds

Question 14

XMSN OIL PRESS* (amber)

Answer 14

Main oil press in one of 5 transmissions below 20psi

Question 15

L/R FUEL BOOST (amber)

Answer 15

Fuel press in fuel supply line less than 10psi

Question 16

XMSN AUX PRESS* (amber)

Answer 16

Aux oil press in one of 5 transmissions less than 10psi

Question 17

ENG 1/2 FUEL PRESS (amber)

Answer 17

Pressure in engine fuel supply line dropped below 10-13psi (not connected at engine)

Question 18

GEN 1/2 FAIL (amber)

Answer 18

Generator contactor has opened and generator offline

Question 19

GEN 1/2 HOT (amber)

Answer 19

Internal temp of generator has exceeded 150*C

Question 20

TR 1/2 FAIL (amber)

Answer 20

TR contactor has opened and TR is offline

Question 21

TR 1/2 HOT (amber)

Answer 21

Internal temp of TR exceeded 150*C

Question 22

NO 1/2 AC ESS BUSS (amber)

Answer 22

Power to AC Essential Bus failed

Question 23

AFT RAMP SMOKE (amber)

Answer 23

Smoke detected in ramp area

Question 24

BATTERY OFF (amber)

Answer 24

Battery switch is off
Battery relay opened automatically
Or battery relay has failed

Question 25

EMERG GEN BEARING (amber)

Answer 25

Emergency generator potential bearing failure

Question 26

HYD 1/2 PRESS (amber)

Answer 26

Pressure in flight controls hydraulic system below 2,000psi

Question 27

HYD OVERTEMP* (amber)

Answer 27

Fluid temp in one or both flight control hydraulic systems OR utility system exceed 138*C Check overhead HYD indicator lights to identify system

Question 28

EMER HYD FAIL (amber)

Answer 28

Backup flight boost pump pressure less than 2,000psi

Question 29

L/R FUEL JETTISON (amber)

Answer 29

Indicates fuel jettison valve is open

Question 30

XMSN CHIP DET* (amber)

Answer 30

Metal particles detected in forward, combining, or aft transmission oil system, OR in aft vert shaft bearing

Question 31

APU ON (amber)

Answer 31

Both ECLs in FLIGHT, APU operating

Question 32

ENG 1/2 CHIP DET* (amber)

Answer 32

Metal particles detected in associated engine OR engine transmission lubrication system

Question 33

ICE DETECTED (amber)

Answer 33

Ice building on detector probe in aft pylon

Question 34

EXT PWR ON (green)

Answer 34

External AC or DC power online

Question 35

ENG STARTER (green)

Answer 35

One or both engine start switches are at MOTOR or START

Question 36

PARKING BRAKE ON (green)

Answer 36

Pressure in one or both brake systems greater than 550-620psi

Question 37

EMERG GEN READY (green)

Answer 37

Emergency Generator and Emergency TR systems available

Question 38

HOOK OPEN (green)

Answer 38

Cargo hook is open

Question 39

APU ON (green)

Answer 39

APU is up to speed

Question 40

GROUND CONTACT (green)

Answer 40

Left and/or right aft landing gear has made ground contact

Question 41

LDG LT ON (green)

Answer 41

One or both landing light filaments switch ON

Question 42

EMERG LTS OFF (green)

Answer 42

Emergency exit light switch is OFF