EP's // CAS Messages Flashcards
Door
Any door ajar with Nr greater than 75% - advisory message will indicate which door
Avionics Fan
Avionics cooling fan inop
applicable maint action required before next flight
Cabin Heat Hot
Cabin heater duct over-temp condition
CABIN HEAT switch - OFF
Instr Fan
Instrument panel area cooling fan inop.
1) If OAT is greater than 116f land as soon as practical.
2) Applicable maint action required.
ENG 1 INTAKE
ENG 2 INTAKE
Respective Engine intake filter air flow restricted.
ENG INTAKE BYPASS switch (affected engine) - Depress (open) if MGT power margin required.
ENG 1 BYPASS
ENG 2 BYPASS
Respective engine intake filer bypass door is open or system not powered.
ENG INTAKE BYPASS switch (affected engine) - Verify selection.
DUAL GEN
Generator 1 and 2 offline.
NOTE: with generators OFF and BUS INTCON and CTR-DU EMERG PWR switches in NORM, a fully charged 25 amp-hour battery provides approx. 37 minutes of power for basic helicopter emergency bus operation.
1) Both GEN switches - OFF, RESET, then ON.
If neither generator restored: Both GEN switches: OFF
3) CTR-DU EMERG PWR switch: OVRD ON, if desired, to maintain center DU or to restore center DU.
NOTE: With a dual gen failure, battery automatically powers both emergency buses. If necessary, BUS INTCON switch may be selected to OVRD ON to restore power to essential buses; however, battery power duration will be shortened. N-ESS BUS switch may then be selected to OVRD ON to restore power to non-essential bus.
4) BUS INTCON switch - OVRD ON (as required)
5)N-ESS BUS switch - OVRD ON (as required)
6)Land as soon as practical
note: center DU will extinguish if selection of CTR-DU EMERG PWR to OVR ON is not carried out with 30 seconds of both gens being offline.
DUAL GEN
Generator 1 and 2 indicate 0 load. Loss of power to essential and non-essential busses.
1) Airspeed - 120kts or less
BATT RELAY
abnormal status of battery relay (contacts either closed when should be open, or open when should be closed)
1)BATT RELAY switch - RESET then NORM.
2) If desired, verify system status on ELECTRICAL SCHEMATIC page of EICAS-SYS
ELECTRIC TREND
Voltage or current approaching a limit.
1)EICAS display - select full EICAS presentation
2)EICAS display - monitor system status in relation to limits.
INTCON RELAY
Abnormal status of interconnect relay. (contacts either closed when should be open, or open when should be closed)
1)BUS INTCON switch - Verify position. Select OVRD OFF if both generators or online.
2)if message remains, verify system status on ELECTRICAL SCHEMATIC page of EICAS-SYS.
BATT PWR OFF
Battery switch is OFF, or RCCB, which provides battery power to emergency busses is inoperative.
1)BATT switch - Verify position
2)If desired, verify system status on ELECTRICAL SCHEMATIC page of EICAS-SYS.
GEN 1
GEN 2
Respective generator is offline
1)GEN switch (affected generator) - OFF, RESET, then ON.
NOTE: if GEN message is in conjunction with associated ENG START advisory message, select BUS INTCON switch - OVRD OFF
If affected generator is not restored:
2)GEN switch (affected gen) - OFF
3) N-ESS BUS switch - OVRD ON, if desired.
4) Amps (A) - maintain within limits
5) land as soon as practical
EMERG BUS 1
EMERG BUS 2
Respective emergency bus is offline.
Loss of electrical power detected on emergency bus by ADIU
1)Verify system status on ELECTRICAL SCHEMATIC page of EICAS-SYS
2)Land as soon as practical
ESS BUS 1
ESS BUS 2
Respective essential bus is offline with on-side generator operating or other essential bus has power with INTCON relay closed.
No power detected on respective essential BUS by ADIU
1) Verify electrical power control switches
2) verify system status on ELECTRICAL SCHEMATIC page of EICAS-SYS
3)Land as soon as practical
N ESS BUS
Non essential bus is offline with both generators online.
No power detected on non-essential bus by ADIU.
1) Verify electrical power control switches
2)verify system status on ELECTRICAL SCHEMATIC page of EICAS-SYS
EXT PWR ON
electrical power applied to external power plug
ENG 1 START
ENG 2 START
respective engine starter engaged.
N ESS OVRD ON
Power is detected on non-essential bus when generator(s) inoperative.
N-ESS BUS switch in OVRD ON position.
INTCON OVRD ON
Battery relay and essential bus interconnect relay closed with both generators inoperative.
BUS INTCON switch in OVRD ON or external power connected.
GEN 1 DEGRADED
GEN 2 DEGRADED
Respective generator regulator control unit output voltage less than 25 volts or GEN reset signal stuck or start signal stuck
(inhibited during start sequence)
-Applicable maintenance required
FUEL 1 PRESS
FUEL 2 PRESS
Respective engine fuel px low
1)Altitude - reduce, if practical
2)prepare for possible engine failure
3)land as soon as practical
FUEL 1 LOW
Fuel qt below appx 110lbs in mid 1 tank.
Note: during refueling if fuel 1 low message doesn’t extinguish with greater than 120 lbs indicated in mid 1 tank, cycle helicopter electrical power or cycle FWD XFER switch to OPEN and back to NORM
1)EICAS - Select SYS softkey
2)FUEL/WT & BAL - Select
3) Fuel quantity - verify mid 1 tank.
4) land as soon as practical
FUEL 2 LOW
Fuel qt below appx 90 lbs in mid 2 tank.
1)EICAS - Select SYS softkey
2)FUEL/WT & BAL - Select
3) Fuel quantity - verify mid 2 tank.
4) land as soon as practical
FUEL 1 VALVE
FUEL 2 VALVE
Respective fuel valve is in transition, or not in commanded position, or not powered.
If condition persists, land as soon as practical.
FUEL BAL PUMP
Fuel balance pump not operating correctly.
1)BAL PUMP switch - OFF
2)Fuel quantity display - monitor
FUEL IMBALANCE
Fuel distribution between systems 1 and 2 indicates fuel imbalance condition of appx 100lbs.
1) FWD XFER switch - Verify position
2)BAL PUMP switch - Verify position
3) Fuel BAL, DU softkey - verify operational.
FUEL INDICATION
Fuel quantity indications/low-level sensors do not correlate in relation to forward fuel transfer pump and fuel interconnect valve settings
Fuel quantity display - monitor
FUEL INTCON
Fuel interconnect valve in transition or not in commanded position or not powered.
1)BAL PUMP switch - Verify position
2)Fuel quantity display - Monitor.
FWD XFR PUMP
Forward (system 1) fuel transfer pump not pumping while fuel remains in forward tank or pumping while no fuel remains in forward tank.
1)FWD XFER switch - verify position
2)Fuel qt display - monitor unusable fuel qt
3)FWD XFER switch - NORM or OFF, if system 1 indicates less than 285lbs
4) FWD XFER switch - OPEN, as required; majority of yellow hatched marked fuel will be recovered as usable up to 150 lbs will remain hatched as unusable depending on helicopter attitude.
FUEL XFR VALVE
Forward (system 1) fuel transfer valve in transition or not in the commanded position or not powered.
1)FWD XFER switch - verify position
2)Fuel qt display - monitor unusable fuel qt.
FUEL LL1 MAINT
FUEL LL2 MAINT
Fault indicated in fuel low level sensor or associated wiring
Applicable maintenance required.
FUEL 1 CLOSED
FUEL 2 CLOSED
Respective engine airframe fuel shutoff valve closed.
REFUEL
appears above fuel indication section of systems monitor area when FWD XFER and BAL PUMP valves are in REFUEL position.
ECU 1 FAIL
ECU 2 FAIL
Respective ECU - critical malfunction (failure causes manual mode to automatically engage)
1) FLY STOP REL (affected engine) - disengage
2)Throttle (affected engine) and collective - coordinate and adjust as necessary to maintain PSI needle of affected engine slightly below PSI needle of normal engine.
3)Land as soon as practical