Hydraulics Flashcards
HOW MANY HYD SYS WE HAVE ON THE B777?
3 THE L,C,R
WHICH SYSTEMS ARE POWERED BY THE HYD?
FLT CONTROLS,
BRAKES,
ALTN BRAKES
LANDING GEAR ACTUATION
NOSE AND MAIN WHEEL STEERING
LE SLATS
TE FLAPS
THRUST REVERSER
HOW MANY HYD SYS ARE REQUIRED TO MAINTAIN AN ADEQUATE AIRPLANE CONTROLLABILITY?
1 SYSTEM CAN PROVIDE AN ADEQUATE AIRPLANE CONTROLLABILITY
WHICH SYSTEMS ARE HYDRAULICALLY POWERED BY THE L SYS?
FLIGHT CONTROL AND LEFT ENGINE TRUST REVERSER
WHICH SYSTEMS ARE POWERED BY THE R HYD?
FLT CONTROLS, R REVERSER AND NORMAL BRAKES
WHICH SYS IF FAILS LEAD TO NO AUTOLAND?
L HYD
HOW MANY PUMPS HAVE THE L AND R HYD?
TWO EACH , ONE PRIMARY AND ONE ON DEMAND
WHAT IS THE PURPOSE OF DEMAND HYDRAULIC PUMPS?
THE DEMAND HYD PUMPS ARE ELEC MOTOR DRIVEN PUMPS, ABLE TO PROVIDE A BACKUP HYD POWER SOURCE FOR THE PRIMARY ENGINE DRIVEN PUMPS,
AND PROVIDE AS WELL A SUPPLEMENTARY HYD POWER IN PERIOD OF HIGH DEMAND
WHICH DEMAND PUMP RUN CONTINUOSLY ON GRD WITH THE SWITCH IN AUTO?
THE RIGHT DEMAND PUMP
WHEN THEY OPERATE THE DEMAND PUMPS?
DURING TAKE OFF AND LANDING, AND WHEN THE SYS OR PRIMARY PUMP PRESSURE IS LOW
WHICH SYS POWER THE CENTER HYD?
FLT CONTROLS,
ALTN BRAKES
LE SLATS
TE FLAPS
NOSE WHEEL AND MAIN WHEEL STEERING
LANDING GEAR ACTUATION
TO WHICH SYS THE RAT CAN PROVIDE HYD POWER?
TO THE CENTER HYD FOR THE PURPOSE OF POWERING THE PRIMARY FLT CONTROLS COMPONENTS ONLY
HOW MANY PUMPS HAS THE CENTER HYD?
2 PRIMARY AND 2 DEMAND
IF ON GRD AND ONLY ONCE SOURCE AVAILABLE INCLUDING THE APU, WHICH PUMPS WILL WORK?
C2 PUMP WILL NOT RUN IF C1 IS SELECTED, UNLESS: ONE ENGINE IS RUNNING,or PRIMARY AND SECONDARY EXT PWR ARE OPERATING,or APU + PRIMARY EXT PWR ARE OPERATING
IN FLT WHEN THE C2 PUMP MAY BE LOADSHED?
ALL OTHER ELECTRIC PUMPS ARE WORKING,
SINGLE SOURCE OF ELECTRIC PWR,
GEN CAPACITY IS EXCEEDED
IF “ON” IS SELECTED THE DEMAND C1 AND C2 CAN OPERATE TOGETHER?
NO THEY CANNOT
IF ON GRD AND SPEED ABOVE 60 KTS AND THE CENTER HYD QTY IS LOW WHAT WILL HAPPEN?
ALTN BRAKES ARE ISOLATED FROM THE SYS AND CONTINUE TO OPERATE USING RESERVE FLUID
NOSE GEAR STEERING ISOLATE AND IS UNUSABLE
SLAT ISOLATED AND NOT OPERABLE IN PRIMARY MODE HYD
WHEN THE LE SLATS ARE CONNECTED BACK TO PRIMARY MODE FOLLOWING A CENTER HYD LOW QTY?
FLUID RECOVER NORMAL FOR 5 SECONDS AND SYS DETECT THAT ENGINES HAVE BEEN RUNNING FOR MORE THAN 30 SECONDS
WHEN THE NOSE GEAR STEERING IS RECONNECTED FOLLOWING A DISCONNECTION DUE TO LOW HYD QTY?
SPEED DECREASE BELOW 60 KTS
HYD PRESSURE C IS LOW
LDG GEAR DOWN SELECTED , BOTH ENGINES ARE NORMAL AND ENGINE DRIVEN PUMP ARE PROVIDING PRESSURE
WHEN RAT WILL DEPLOY?
BOTH ENGINE HAVE FAILED
BOTH AC TRANSFER BUS UNPOWERED
ALL 3 HYD SYS PRESS IS LOW
