ENGINE & APU Flashcards
WHICH ENGINE POWER THE 787-8?
GEnx 1B67 WITH 67000 LBS TRUST
WHICH ENGINE POWER THE B787-9?
GEnx 1B70/75 69800 LBS OF THRUST EACH
WHAT IS CONTROLLING THE ENGINE?
THE EEC CONTROLS THE ENGINE
HOW MANY ENGINE INDICATION WE HAVE ON B787?
2, PRIMARY AND SECONDARY
PRIMARY INDICATIONS?
N1 AND EGT
SECONDARY INDICATIONS?
N2,FF,OIL QTY,OIL PRESS,OIL TEMP, VIB
WHEN SECONDARY INDICATIONS AUTOMATICALLY SHOWN?
.INITIAL POWER UP .START SWITCH IN START .FUEL CONTROL IN CUTOFF IN FLIGHT .EXCEEDANCE .N2 BELOW IDLE FF ADVISORY SHOWN .FIRE SWITCH PULLED
WHAT HAPPEN IN CASE OF EXCEEDANCE OF A PARAMETER OPERATING LIMIT?
THE ROUND DIAL AND OR BOX BECOMES RED , WHEN THE PARAMETER COMES BACK TO NORMAL THE RED COLOR CAN BE RECALLED
HOW MANY MODES HAS AN EEC?
2 NORMAL AND ALTN
HOW MANY ALTN MODE HAS AN EEC?
TWO SOFT AND HARD
WHICH PARAMETER IS USING THE EEC TO MANAGE THE ENGINE?
N1
HOW THE ALTERNATE MODE ACTIVATE?
IF NORMAL SIGNAL ARE NOT AVAILABLE THE SYSTEM OF THE EEC SWITH AUTOMATICALLY TO ALTN MODE
SOFT MODE: AUTO SWITCHING AND NORM STILL SHOWN IN THE SWITCH
HARD: MANUALLY SELECTED
IS THE A/T WORKING IN EITHER ALTN AND NORMAL MODE?
YES IT DOES
WHICH FEATURE PROVIDE THE EEC?
OVERSPEED PROTECTION, START MONITORING,THRUST RAMPING,TAP,IDLE SELECTION,AUTO RELIGHT,IGNITION,
HOW DOES IT WORK THE OVERSPEED PROTECTION ?
CONTROLLING THE N2 RPM AND ADJUSTING THE FUEL FLOW,IF THE OVERSPEED OCCURS AND PERSIST ENGINE WILL BE SHUTDOWN
THRUST RAMPING FEATURE?
TO AVOID AND REDUCE HIGH STRESS ON THE FAN BLADE DURING TAKE OFF IN HIGH GUST OR CROSSWINDS THE TAKE OFF THRUST IS SLOWLY AND GRADUALLY SET,DUE TO TRUST RAMPING TAKE OFF THRUST MAY NOT BE AVAILABLE UNTIL 65 KTS
WHEN THE EEC COMAND A SHUT DOWN OF THE ENGINE ON GRD?
WHEN ON GRD ,THRUST LEVER IDLE AND ENGINE IS ABOVE IDLE SPEED AND NOT DECELERATING NORMALLY
WHAT IS THE TAP?
(THRUST ASYMMETRY PROTECTION) IS AN AUTOMATIC FEATURE THAT PROVIDE PROTECTION AGAINST ASYMMETRIC THRUST CONDITION DURING TAKE OFF OR GO AROUND LIMITING OR REDUCING THE HIGHER THRUST IN AN ENGINE
WHAT THE TAP ENHANCES?
LOWER APPR SPEED
INCREASE ENGINE OUT CONTROL
FULL RATED THRUST AVAILABLE FOR ALL ENGINE OPS AT ANY SPEED OR WEIGHT
WHAT IS THE TBV?
TRANSIENT BLEED VALVE,IT S PURPOSE IS TO UNLOAD THE COMPRESSOR DURING ACCELERATIONS
WHAT IF THE TBV STUCK OPEN?
AND “ENG TBV OPEN “EICA APPEAR Associated reverser is deactivated or if it happen during REV OPERATION THE AFFECTED REV IS LIMITED TO IDLE
WHEN THE “ENG TBV OPEN” EICAS SHOWS
BELOW 80 KTS ON GRD
WHICH IDLE SELECTION ARE AVAILABLE ?
MINIMUM IDLE
ICE IDLE
APPROACH IDLE
WHEN IS THE APPROACH IDLE SELECTED
WHEN FLAPS ARE 25 OR MORE AND GEAR DOWN
WHEN ICE IDLE IS SELECTED?
WHEN EAI IS ON
WHAT IS THE ICA?
ICE CRYSTAL ANTI ICE,AUTOMATIC FEATURE,ACTIVES ONLY ABOVE 30000FT LAST 30 MIN WITH INCREMENTS OF 15 MIN MORE, AND STOPS DESCENDING BELOW 28500 FT
HOW THE ENGINE CAN BE STARTED>
USING ONLY THE AUTOSTART
WHAT IS CONTROLLING THE START SWITCH?
THE STARTERS
WHAT IS CONTROLLING THE FUEL CONTROL SWITCH?
IT CONTROLS FUEL AND IGNITION
WHICH SOURCE CAN BE USED TO START THE ENGINE?
APU EXT POWER OR THE OTHER ENGINE
WHEN THE START WILL BE ABORTED AND NO EXTRA ATTEMPT WILL BE MADE?
WHEN : BOTH STARTERS FAIL, NO N1 ROTATION, NO OIL PRESSURE
WHEN THE EEC TRY TO CORRECT THE START?
HUNG START HOT START WET START NO EGT RISE EXCEEDANCE OF START LIMIT TIME COMPRESSOR STALL LOSS OF ONE STARTER
HOW MANY ATTEMPTS ON GRD TO START?
3
HOW MANY IGNITERS HAS EACH ENGINE?
2
WHEN THE AUTO RELIGHT FUNCTION IS ACTIVATED ?
ON GRD OR IN FLIGHT ANYTIME THE ENGINE IS BELOW IDLE AND THE FUEL CONTROL SWITCH IS IN RUN
ENGINE FUEL SYS?
FUEL GOES FROM RESERVOIRS TO SPAR VALVE ,PUMP,HEAT EXCHG,PUMP,FILTER AND FMU
OIL SYS
RESERVOIR,OIL PUMP, OIL FILTER, 2 HEAT EXCHG,GEAR BOX,SCAVENGE
HOW MANY STARTERS HAS THE APU?
2 L AND R
IN BATTERY START THE APU WHICH STARTER USE?
RIGHT ONE
UP TO WHICH ALT CAN START APU WITH NO PUMP OPERATING?
UP TO 14000FT
WHEN THE APU IS CONSIDERED ON?
95% +2 SEC
HOW MANY START IS DESIGNED FOR THE APU BATTERY?
3 ATTEMPTS BUT BEFORE DOING THE 3 RD ONE 5 MIN COOLING PERIOD REQUIRED
IN FLIGHT WHEN THE APU START AUTOMATICALLY?
WHEN 3 OR MORE ENGINE GENERATORS FAILS
AT HOW MANY % RPM THE ACU SLOSES THE APU DOOR?
15%
APU OPERATING MODES
ATTENDED AND UNATTENDED
