Tech exam Flashcards
MTOW and MLW for A and B model
12700/12340 & 13605/12930
How do you test the Auto Ignition in the A model?
PL above FI with both engines shut down
How do you test Auto Ignition in the B model?
Before engine shut down when CL at Fuel shutoff, as the Ng decreases, the FSP IGN lights must illuminate until Ng decelerates below 62%
What is the ITT Limitation for the B model with No APR 2mins and 5 mins?
927 and 917- FCOM Chpt 2
What is the ITT Limitation for the B model with APR - 2mins and 5 mins?
950 and 940 - FCOM chpt 2
What causes the HP HIGH light to illuminate on the OVRHD panel?
HP valve fails to close after close command is received- FD Panels and lights
What causes the BAT HOT light to illuminate ?
Battery temp over 71 degrees
When does EMERG POWER illuminate on the overhead panel?
Emerg bus not powered,
Emerg battery less than 24v, or
Emerg battery not being charged
When does the INVERTER light illuminate on the Overhead panel ?
If inverter fails or the switch is in the OFF position - FD Lights and panels
“Pitch trim” on the CWP indicates what?
Pitch trim sync is deactivated- Bonus what causes this? 1 unit of disagreement
What is touchdown protection?
It prevents from landing with brakes on
In order to function we need-
Anti skid ON,
Gear level DOWN and
WoW for over 3 seconds, or
PL below FI for over 3 seconds or
Average wheel speed 50KIAS
How do you energise the MAIN START BUS?
Gen bus or GPU online
Bus tie must be closed
What are the functions of the Hydraulic AUTO pump?
Pressurise system in normal operations and shuts off when there is no demand
What does GPU relay do to other relays?
Opens Start/Gen/Battery relays
When is the EMERG Battery charged?
When the L Batt bus is powered by at least one battery switch on
Where does the ignition system get its power from?
1 of the 3 windings in the Alternator
What does DE ICE OVERTMP light indicate?
Either temperature sensor is reading over 150 degrees
When does the Hydraulic system operate in AUTO?
Turns on at 2100psi and off at 2900psi
Also during gear extension and retraction
Extension until left main is down and locked
Retraction until both main are up and locked
If we start the BATT in override, what are we doing?
Overriding the 71 degree battery protection
If the px controller is functioning normally in AUTO, what px will it limit the system to?
7.1psi
When does CABIN PRESS altitude warning illuminate?
10000ft Cabin alt
What does the emergency accumulator do?
Release emergency up-locks and pressurise the main reservoir
What is the accumulator nitrogen precharge pressure?
1650psi
How do we pressurise the brakes if the main accumulator pressure is lost?
Hand pump
What is the first memory item for the HYDR light?
Hydraulic pump off
If the cabin is over pressurising and electro pneumatic valve (primary) is stuck, how can you de-pressurise?
Can do so manually by moving switch to manual and using secondary outflow valve
What is the ancillary system for the Hydraulics system?
The hand pump - FO side
How is the fuel heater operated?
Operated thermostatically- thermostat switch
How is the fuel heated?
Heat exchanger uses PGB oil to heat the fuel before it is transferred to the HMU
To operate the hydraulic pump in override do we need battery on?
L Batt bus and AUTO is preferred
Initial pressure for the main reservoir is supplied by ?
Internal spring pressure and emergency accumulator
What controls propeller blade on ground and in sky?
Power lever below FI (Beta) and Condition levers above FI
What is the SHP on the B model (APR on)
1870
Max prop RPM for take off?
1396 rpm
Engine starter duty limitations
Max start 2 with 3 minutes then 25 between start cycles
Max motoring 3 x 30 second ventilations then 1 hour for subsequent start/motoring cycles
Max start time is 20 seconds
If the Ng is going through 40% and stays there, what do you do?
Abort start- CL off and Ign Off
Max start ITT for a B Model?
965 degrees
What does the ANTI ICE light on the FSP indicate?
Anti Ice switch position is ON
Max starter engaged time?
70 seconds including 30 seconds of motoring
Fuel Conundrum- Left to Right
Battery ON
Power Fuel Panel
Fuel Mid/High
Open de fuel valve
XFEED ON
LH STBY pump OVRD
Pneumatic jet pump connected to WoW switch does what?
Assists the airflow around the precooler on the ground
When is the bottoming governor enabled in the A model?
581 RPM
Normal ground ops = 1040 rpm
Reverse thrust ops = 1200rpm
What is the voltage required for a battery start?
24 Volts
What powers the engine electrical intake mats?
AC Wild generator
If you lose an AC generator airborne, what do we lose?
Ice protection for that side. Cannot fly in icing conditions anymore as it cannot be crossfed
Gas generator overspeed is prevented by what?
Overspeed shut off valve in the HMU, when the Ng reaches 110% the overspeed shut off valve induces flame out by shutting off fuel. There is no auto relight function– overspeed governer in the HMU (exam)
What is the CTOT T/O function in the B model? How do you switch it on?
CTOT T/O provides constant power at take off to counteract torque bloom caused by RAM air at take off.
Require CTOT and Autocoarsen ON
If the Left aileron system is jammed what trim do we use?
Use the standby trim on the right aileron.
How do we reset torque motor?
By shutting engine down, CL to Fuel SHUT OFF
What is the purpose of the CTOT?
Is to increase engine speed beyond the power lever position
What happens when you pull the fire handle?
Engine fuel shut off
Bleed air OFF
Start/Gen relay open
Silence fire bells
Reset master warning
Squibs armed
How is the power turbine (Np) protected from overspeed?
When Np speed is 25000rpm (1573 prop rpm) is reached, the DECU shuts fuel, after a 5 second delay it initiates ignition for 7 seconds. If the rpm has dropped below overspeed value, the fuel is reintroduced
What is the purpose of the autocoarsen system?
Fast reduction of the windmilling drag experienced at engine failure
How do you feather the propeller?
Move condition lever to the Start detent
What does Duct OVER TEMP light indicate?
ACP compressor discharge temp is above 225 degrees, or
Distribution duct temp is above 82 degrees
Engine fire detection system incorporates what? How is fire detected?
Using a single continuous loop detection circuit
Where does the fire detection system get its power from?
Emergency battery bus
How does the extinguishing system work?
1301 Halon extinguisher in each engine nacelle able to cross-feed
Dual wall 1301 Halon in the cargo with 35 minutes run time, external immediately dispersed and internal slowly to prevent re-ignition
How does the extinguishing system work?
1301 Halon extinguisher in each engine nacelle able to cross-feed, discharged using switch in cockpit overhead
Dual wall 1301 Halon in the cargo with 35 minutes run time, external immediately dispersed and internal slowly to prevent re-ignition, no auto discharge, use switch in cockpit overhead
1211 Halon extinguisher in the lavatory bin, extinguishes automatically when 75 degrees or above is sensed.
Where does the extinguishing system get its power from?
HOT Battery bus
How do you stop the stick pusher from pushing?
Push 1 of 2 “Pusher Disarm” buttons in the cockpit
At what temp will the “Tail Pipe Hot” light illuminate?
235 degrees
What do you do when there is an elevator trim runaway in the nose down position?
Use the standby trim to disconnect or pull circuit breaker (Right is standby)
If you have used the fire extinguisher in the right engine and the fire is still on, what do you do?
AAHHHHH Fuaarkkk!!
Cross feed the left extinguisher into the right nacelle
What is the indication the fire is out?
Fire handle and CWP are not illuminated anymore.
What is the extinguishing agent for the cargo compartment?
1301 Halon
What type of extinguisher in the cargo compartment?
Dual wall with 35 minutes run time
(2 bottles in WT - 60 minute run time)
What is the usable fuel capacity?
2542 kg @ 0.79kg/l
When do the standby fuel pumps operate?
At start up when CL out of fuel shutdown the standby pumps operate until main pumps are fully operative, 10psi differential.
Also on when main pump pressure decreases
At what differential pressure will the “FUEL FILTER” light illuminate?
9 psi
What causes the bleed valve to close?
Fire handle pulled,
bleed air temp at 288 degrees,
regulated pressure 43.5psi,
ACP discharge temp 225 degrees,
Distribution duct at 82 degrees
Bleed closed by pilot
When does the inverter light illuminate in the A model?
Inverter is offline
or
switch is off
When does the oxygen light on the CWP illuminate?
When the pressure is below 800 +/- 35 psi
What does the BLUE FUELLING light onthe overhead panel indicate?
Fuel panel switched ON, or
De-fuel valve OPEN
Fuel indicators calibrated to?
Usable fuel