Operations/Systems Flashcards
When will packs shut down automatically? (3)
- Pack Shutdown switch in Auto - engine fails below 3000 ft AGL
- Commanded to by FMS for takeoff
- High supply duct temperatures (L/R)
When does CABIN ALTITUDE level 3 red boxed warning come on?
Cabin pressure altitude exceeds max limit of 10,000 ft
What is the function of PCDU?
It distributes power to the GEN bus and Bus Tie
Which electrical components does the PCDU integrate? (6)
- Generator control unit
- Generator relay
- Bus tie or external power relay
- Transformer/rectifier
- DC tie relay
- Various protective circuit breakers
Electrical power control unit (EPCU) provides what? (4)
- External power protection
- Automatic power transfers (NBPT)
- Automatic emergency power activation
- Galley power shedding
What are the AC power distribution automatic priorities for GEN buses?
Highest is same side generator — APU — External power — lowest is opposite engine generator
Power source priority for the AC TIE bus?
APU gen, external power, right, then left AC system
What does the Air Data Heat switch do?
Pushed out and dark provides heat for all pitots, rudder limiter, AOA probes, static ports, and RAT probes (RAT probes inhibited on ground)
When does pitch limit indicator turn red?
PLI is at stick shaker
How long can batteries illuminate emergency lights?
10 minutes
Which emergency light switch can override the other?
EMERGENCY LIGHT switch on forward cabin attendants’ panel
How do we preflight the emergency photo-luminescent floor lighting strips first flight of day?
Ceiling lighting set to bright w/overhead bins closed for at least 15 minutes
How many emergency exits DOORS are there?
7 - main cabin/fwd entrance, service door, four overwing, aft tailcone
What do we have to do if an overwing emergency exit door is opened?
Captain must write it up and advise maintenance control
How long does the PBE oxygen generator last?
15 minutes
How long does cabin oxygen generator last?
15 minutes
When should cabin oxygen masks deploy?
When cabin altitude exceeds approximately 14,150 ft
Which bus powers the emergency battery packs for emergency lights?
DC transfer bus
NO MASKS
Red boxed level 3 - Cabin altitude exceeds 14,750 ft and O2 masks haven’t deployed
Name the engines and thrust
Rolls Royce BR715 : 18,500 lbs (23,000lbs thru the gate)
What drives the engine accessory drive gearbox?
N2 compressor
Each engine has how many ignition units?
2
Intersection takeoff weight limitations:
HNL 08L/L = 98,000 lbs
KOA 17/G & 35/H = 100,000 lbs
How long will aircraft batteries power emergency busses?
Approx. 60 minutes
When will EEC abort an engine start?
- Fuel ON conditions not satisfied.
- Hung start: 12% N1, N2 stagnates, TGT rises
- Starter cutout speed not reached by 3 minutes.
- Hot start
- Loss of valid V2 signal
EIS? VIA? DCU? EAD? CAWS?
Electronic Instrument System Versatile Integrated Avionics Data Concentrator Unit (receives analog data from aircraft systems & changes into digital data for VIA’s) Engine & Alert Display Central Aural Warning System
What computer functions do the VIAs provide?
- FMS
- EIS
- CAWS
- Master warning/caution
- Digital Flight Data Acquisition Function (Flt. Data Recorder)
ADIRU/MCDU Power supply
Left: Emergency Bus (aircraft batteries - 60 minutes)
Right: Right AC bus (ADIRU battery backup 30 minutes)
Single bleed operation with anti-ice on
Bleed ISOL valve must be in AUTO: wing 15 minutes, tail 2.5 minutes
Right hydraulic system:
L/R Outboard Spoilers Rudder R reverser Landing Gear Slats, Flaps, Rudder Stop Limiter Nosewheel Steering Brakes
Left Hydraulic System:
L/R Inboard Spoilers L reverser Elevator Augmentation System Slats, Flaps, Rudder Stop Limiter Nosewheel steering Brakes
Normal APU shutdown involves a 17 sec delay for no break power transfer. When is this bypassed? (3)
- APU FIRE CONT switch moved to “OFF & AGENT ARM”
- APU Ground Control Panel switch to “SHUTOFF”
- Electronic Control Unit detects APU compartment fire
When will the APU shutdown automatically in flight?
APU Overspeed
APU Compartment Fire
Aft Accessory Compartment Overheat Detection
-If senses an overheat, will shut off APU bleed air supply. (Inhibited inflight & during engine start)
Cargo Smoke
Agent 1 & 2 times
Agent 1 : 1 minute
Agent 2 : 2 hrs
What are the takeoff “essential items” for Electronic Instrument System (EIS)?
- Stab trim
- Rudder trim
- Slats
- Flaps
- Spoilers
- Brakes
When does cabin pressurization begin?
Throttles advanced for takeoff.
- depressurizes for rejected takeoff when throttles retarded
- outflow valve opens automatically after 60 seconds & not in the air
When does SELECT CENTER TANK PUMP OFF alert come on
Center fuel tank less than 70 lbs & center fuel tank pumps have been on more than 10 minutes.
FMS Prof mode available when after takeoff?
400 ft AGL
What has failed if all 3 left or all 3 right Display Units fail?
VIA 1 or 2 failure
Fuel tank quantities
Left/Right : 9,266 lbs
Center : 6,077 lbs
Total = 24,609 lbs
How many fuel magnetic dripless fuel sticks are there & where?
9 total, 4 in each main tank, one in center tank
How can you check fuel quantity in-flight if FUEL QTY A & B are inop?
Calculate the fuel onboard using data from the FMS Progress page.
Which electric bus powers the Hydraulic AUX pump?
Left AC GEN bus
What does the Hydraulic Transfer Pump do?
Mechanically transfers pressure from an operating pressure source to an unpressurized system by way of an interconnected motor and pump.
When does gear warning horn sound? When can you silence it?
- Gear not down & locked, throttles retarded, airspeed < 210 KIAS, less than 1,200 ft AGL (CAN SILENCE)
- Gear not down & locked + flaps in landing position (25° or 40°) (CANNOT SILENCE)
What does a clapper do in the elevator control system?
If control column becomes disconnected and there is no jam, CLAPPER will cause both columns to move & both elevators to move. If there is a jam, CLAPPER will allow non-jammed side to move independently.
What are aileron torque tubes & bus cables for?
Bus cables synchronize aileron movement.
Torque tube links the control wheels (can be overridden)
What are the components of the EIS?
- 6 DU’s
2. 3 computers (2 VIAs & 1 DCU)
What data (6) does the ADIRU provide to the EIS?
- Heading (True and Magnetic)
- Angular rate (green heading predictor)
- Acceleration
- Attitude
- Velocity
- Present Position
Nose wheel steering: Rudder Pedal range & Tiller range
Rudder pedals = 17°
Tiller = 82°
How many hydraulic accumulators?
- Elevator Augmentation System
- (2) L/R Hydraulic Systems
- (2) L/R Brake
- (2) L/R Reverser
When do the dual cabin pressure relief valves begin to limit cabin differential pressure
8.0 psi
APU fuel burn rates (ground & air)
Ground - 350 lbs/hr
Air - 110 lbs/hr
When will the GO-AROUND mode engage?
Go-around buttons pushed when airplane below 2,500 ft AGL & slats extended (or flaps 3 degrees or more)
