Systems Flashcards
Left (only) Hyd System Powers?
L/R Inboard Flt Spoilers
L Thrust Rev
Elevator Augmentation Sys
Right (only) Hyd System Powers?
L/R Outboard Flt Spoilers
R Thrust Rev
Rudder
Landing Gear
Both Hydraulic Systems power?
Steering Slats Flaps Brakes/Antiskid Rudder Limiter
HYD CONT RUDDER switch
Reverts Rudder to Manual Operation
Min taxiway width for 180 turn
81 ft
Min crew O2 for dispatch
1000psi
min oil quantity for dispatch
MX station: 9 qts
Non MX station: 7 qts
Min HYD quantity
7 qts per system
Center tank fuel pump preflight
If center tank fuel is present, center pumps must be individually checked to verify operation prior to engine start.
AVIONICS COOLING switch functions:
OVRD
FAN
OVRD: fans are off, venturi valve opens, airflow cools radios
FAN: primary fan cools radios, backup fan will come on automatically
Both fans operate on ground, switch is only operative inflight.
RAM AIR switch:
OFF
ON
OFF: ram air valve closed
ON: Ram air valve opens, allowing ram air to enter air conditioning ducts (in flight only)
Do not use ON position to ventilate on ground
PACK SHUTDOWN switch:
OVRD
AUTO
OVRD: overrides the auto pack shutdown for an engine failure OR when packs are selected OFF on FMC
AUTO: Allows automatic pack shutdown if engine fails
Auto pack shutdown is disabled > 3000AGL
Pack will also auto shutdown if high supply duct temp. This cannot be overridden.
FLOW switch:
HIGH
NORM
NORM: Lower airflow rate (position for T/O)
HIGH: provides a higher airflow rate
Bleed air ISOL switch:
CLSD
OPEN
AUTO
CLSD: isolation valve is closed, isolating L and R pneumatic systems
OPEN: isolation valve is open allowing crossfeed of L and R pneumatic systems
AUTO: isolation valve is controlled by the pneumatic system controller. Allows automatic crossfeed of L and R systems during one bleed source operation with AIRFOIL ICE PROTECTION ON.
Instrument panel FLOW indicator
ON
OFF
ON: on the ground, with a/c off, indicates instrument panel cooling fan airflow
OFF: on the ground, with a/c off, indicates absence of airflow and cooling fan failure
- Indications only apply with both packs off.
- With both packs operating, instrument cooling fan is provided by a/c system (fans are off)
- on ground if one pilot leaves cockpit with APU on, one pack should be selected off so fan operates.
GASPER BOOSTER FAN switch:
ON
OFF
ON: provides supplemental ventilation with or without a/c packs operating
OFF: booster fan is off (switch dark)
How are cargo compartments heated?
Live animal restrictions?
In flight, if primary fan is operating, fwd cargo is electrically heated to 60-75 degrees F.
Live animals only in FWD
Aft cargo is headed with cabin exhaust air
What is PODS?
Pneumatic Overheat Detection System
Detects overheat in Tail Compartment AND along wing and tail A/I manifolds
If A/I manifold fails, PODS automatically closes respective A/I valve and alerts crew
PODS is automatically tested when engine fire test is performed.
when is ENG ANTI ICE required?
OAT 6C or less (10C or less in flight) and any of following:
- visible moisture or vis <1mile
- 3C or less temp/dwpt spread
- Contaminated ramps/taxiways/runways
When are engine run ups required during icing?
40% N1 for 10 seconds every 60 minutes
Standing T/O required.
50% N1 before t/o roll
Standing T/O?
Required during icing conditions
Hold brakes until 50% N1 before start of takeoff roll.
WING ICE DET switch function?
RESET
TEST
RESET: resets system and removes WING ICE DETECTED alert from EAD. System will not reset if ice still detected.
TEST: tests the wing ice detection system
(FUNCTIONS ON GROUND ONLY)
Do not takeoff with WING ICE DETECTED alert displayed
Which cockpit windows are heated? Antifogged?
all 3 pilot windshields are electrically anti iced and electrically anti fogged
Clearview windows are also anti fogged
Which control surfaces are anti iced with bleed air?
Wing slats and horizontal stab leading edge from either or both engines
When does Gear Horn sound?
Can it be silenced?
- Gear not down and locked w/ flaps in landing range (can not silence)
- Gear not down and locked and:
-Throttles retarded- Airspeed <210
-Altitude <1200 AGL
(can silence)
- Airspeed <210
maximum brake temperature for takeoff
Brake temperature must not exceed 115°C for airport elevations up to 2,200 feet MSL
Temperature limits are based on a 120K pound aircraft and a V1of 140 knots.
To confirm actual brake temperature limits based on different conditions, reference ODM
After landing, brake temp differential on same side gear of up to _____ is considered normal
60 degrees C
aircraft turn capabilities with the nose gear steering wheel and rudder pedals
NWS - 82 degrees either side
Rudder pedals - 17 degrees either side
What is ground shift sensing system?
Flight/Ground switch.
Located on Nosewheel strut
Locks gear retraction handle in down position. Can be overridden by holding the gear handle release switch.
Recall cautions associated with ground operations when landing after an Emergency Gear Extension
Right hydraulic system is isolated, so NWS steering is limited to the left.
- Stop on Runway
- close and latch main gear doors manually
- insert gear pins before tow or taxi.
How are brakes powered?
Each brake assembly is powered by both hydraulic systems.
If both Hydraulic systems fail, each system has a backup accumulator of sufficient capacity to stop the airplane.
Recall features of the antiskid system
Allows maximum wheel braking without skidding the tires
Prevents brake application until after main wheel spinup
Automatically disabled at low taxi speed
Automatically tested when power is applied
How to activate/deactivate the oxygen mask microphone?
Activated when removed from compartment
Deactivated when compartment doors are closed and TEST/RESET button is pushed.
What system is available for SELCAL and how is an incoming call recognized?
VHF only; mic switch on ACP illuminates and chime sounds
Recall degraded cabin communications considerations when operating with GEN L
OFF (and left AC and DC busses amber) or Complete Loss of AC Power
No flight attendant CHIME capability exists with aircraft GEN L OFF (and left AC and
DC busses amber) or Complete Loss of AC Power. The CABIN INTERPHONE must
be selected ON to enable flight attendant communication with the cockpit
EMER PWR Selector function
Test indications
Crew limitation
If power is lost to either AC or DC EMER buses, Battery will power these buses.
Automatically tested on ground with both engines shut down when switch moved from OFF to ARM. Indications: ON light illuminates and EMER PWR TEST alert displays.
Must be OFF if crew leaves a/c with EXT PWR.
which buses are powered on EMER PWR and how long the battery can provide
power
approximately 60 minutes: Battery direct bus DC transfer bus Emergency AC bus (through emergency inverter) Emergency DC bus
Explain the function of the L/R BUS TIE Switches
Open – Respective generator cannot power the
tie bus. Can also be used to reset a bus tie
lockout on the ground
AUTO – Generator bus to tie bus connection is
controlled automatically to meet aircraft power
requirements
Recall the function of the DC BUS TIE Switch
OPEN - Opens all three DC bus tie relays
AUTO - DC bus tie relays are automatically controlled to
ensure all DC buses are powered
Recall the function of the L/R GEN Switches
RESET – Resets the generator
OFF – Disconnects the generator from the respective bus
ON – Allows an operating generator to supply power to its respective bus
Recall the function of the APU Power Switch
RESET – Resets the generator
OFF – Disconnects the APU generator from the tie bus
ON – Allows an operating APU generator to supply power to the tie bus
Recall the function of the EXT Power Switch
OFF – Disconnects EXT PWR from the tie bus
ON – Connects EXT PWR to the tie bus
Recall the function of the GND SERVICE ELEC PWR Switch
OFF - Neutral position for ground service power
ON - Connects external power to the AC ground service bus and powers the
DC ground service bus. EXT power switch is OFF
Recall features of the No Break Power Transfer (NBPT)
Normally, all electrical power source transfers will occur without power interruption
Momentary breaks in power supply, however, may occur during the transfer of power
from the APU to an external source OR if a supplying generator experiences an
unexpected power loss (due to a flameout or unexpected shutdown, etc)
Rated thrust of BR715 engine
21,000 lbs
Engine starter duty cycle limits
Three start attempts, with a maximum of 3 minutes duration each
15 seconds is required between start attempts
Allow 15 minutes of starter cooling before further start attempts are made
Recall the requirements for a ground, engine AUTO START
IGNITION Switch – AUTO
ENG START Switch—Pulled
FUEL Switch – ON
During an auto-start, the EEC controls all fuel metering and ignition to the respective
engine once the ENG START Switch is pulled and the FUEL Switch selected ON. The
auto-start includes an automatic 30 second engine motoring delay before fuel is
introduced
Auto-Start also includes a TGT protection threshold and will not allow fuel introduction
unless the respective TGT is below 150ºC
Recall reasons for an Auto Abort during a ground engine Auto Start
- Hung Start
- Starter duty timer is exceeded (3 minutes)
- Hot Start (or impending hot start) - 700ºC
- Fuel On condition not satisfied (TGT is above 150ºC)
- Loss of valid N2 input
- Certain failures of both channels of EEC
Are inflight starts AUTO or MANUAL?
Manual only.
AUTO ABORT start protections provided by the EEC are not available
during in-flight starts – ALL in-flight starts are MANUAL starts
Recall the required engine warm up and cool down times
WARM UP
- following engine shut down of 2 hrs or less = NONE
- following engine shut down > 2 hrs = 3 min
COOL DOWN
- 3 minutes and verify “ENGINE COOL” alert message on EAD
approximate STD day engine indications after a stabilized start
EPR -- 1.0 N1 – 20% TGT -- 400 N2 -- 60% FF -- 600 - 700 Oil Press -- 45
FADEC components?
Throttle
Throttle module
EEC
When will EEC provide Automatic Ignition?
auto-relight
DUAL ignition: Combustor instability Significant water ingestion Significant ice ingestion Flameout
SINGLE ignition:
-after either ENG ANTI ICE selected on (for 60 seconds)