Tech Notes Flashcards
How long does the Emergancy battery power to th AH and flood lights
1.5 hours
How long can the starter be engaged for?
10 seconds max
Stal Ht Fail on the ground
No dramas on the ground
Indicates over heating
If both alternators fail how long does the main battery provide power for?
30 mins
When does the check gear caution message display?
When either ldg flap selected or One lever less than 25%power and the gear is not down and locked
Have to switch off with OEI
Flap Positions and Lights
Up 0 deg green
App 20 Deg white
Ldg 42 deg white
What prevents inadvertent gear retraction on the ground?
Electrical Squat Switch
Prevents hydraulic valve from switching
What is the min RPM for feathering?
When the master switch is turned off. The accumulator valve closes and the electric governor valve opens. Allowing oil to escape. If the RPM is above 1300 the prop will feather. If below the start lock will prevent the prop from feathering
Advantages of wood propellers
Light
Less prone to vibration
Quicker to respond to rpm changes
ECU test operation
Power idle rpm below 900 press test
- ecu A to b back to A
Power above idle and above 900 rpm
-ECU caution message displayed
Oil systems and grades
Engine and turbo charger
- Shell Helix ultra 5w40 synth API SJ/CF
- Aero Shell 10W40 Diesell oil
Gearbox and prop gov unit
Why is there an inter cooler just after the compressor on the turbo charger system
To increase engine efficiency by cooling the air after it has been heated by the compressor
What do the magenta line on the altimeter and ASI indicate?
Trends predicting 6 seconds
Correct tyre pressure
Nose - 6bar
Main - 4.7 bar
De Icing
30 litres
2 pumps
Windshield separate system
Low level 10 litres
-45 mins in norm mode
Min 22 lites in known icing
- 1.5 hours in norm
Norm
- 30 seconds on 90 off (both pump )
- 2.5 hours
High
- continuous (1 active pump) selected by selection
- 1 hour
Max - switches both pumps on for 2 mins -switch’s on the other pump that is not selected for 2 mins in Addition to high mode - max 30 mins -
Press De ice Annun Test
Alternate
Windshield
De Ice lo level illuminates
120 seconds pres lo illuminates
Connects pump 2 directly to RH bus bar
5 seconds continue independent of system
How long and wide is the DA42?
Span 13.42m
Length 8.56m
What is a marker signal?
Light and sound signals giving distance from the runway
Outer marker(faf)
Middle marker
Inner Marker
Being replaced by DME with Localiser
Audio panel
Hi Sens
Pa spkr
Com 1/2
Select to increase the sinsivity of marker beacon
Pa - headsets
Spkr - cabin speaker
Split com
Com mic - active tranciver
Com receiver only
Pages available on the MFD?
Map
Waypoint
Auxiliary
Nearest
Flight plan (accesses by button)
What does pressing in the FMS on the MFD do?
Allows you to use the cursor
How do you quickly get to the Nav map page?
Hold down CLR button
What’s dangerous about using the landing gear operation with OEI?
High electrical demands
What happens if the the altimeters are not within 50ft on decent.
Use the lowest
Why are you unlikely to get DME results on testing?
DME is electronically altered to read zero at the rwy threshold
Recommended derive frequencie
112-118 VOR only
113.40 SAM detained by 5hz
NG power plant
Austrian Engine AE300
Max power 123.5kw at 2300rpm
Max continuous power 113.6kw at 2300rpm
Rpm after start
Must remain at idle for 2 minutes then max 1400rpm until oil temp is in the green
Thielert 125 unfeathering speed and height
2 litres 99kw
8000ft max
110-120 kts
When does the variable stop engage?
Both engines more than 20% and flap to land and
Nominated aircraft grounding point
Metal section of the steps
For the Austro E4-c what is the maximum powers restriction?
No more than 90% for longer than 5 minutes
What’s the purpose of a check relief valve?
To allow air to enter the tank
How is the bypass of the exhaust gases controlled
A sensor located on the outlet of the compressor sent to the FADEC
How many air sources feed the turbocharger
Two
1 filtered ram air
2 unfiltered warm air from engine cowling
What are the approved anti ice fluids?
Al-5
Aero shell compound 7
Glycol based
Oil grades
Engine
- shell heliex ultra 5w40
- aero shell 10w40
Gearbox
-shell EP 75w90
Tructure
Semi monocoque
Skin takes some of the load
CFRP
GFRP bulkheads and stiffners
If selecting alt static what other measure must you take?
Cabin ventilation must be closed
What are we locking for when checking the ailerons?
Roll pins which secure the hinges
Locking varnish in nuts show there hasn’t been excessive movement
What do the glow plugs do?
Pre heat the cylinder as disel requires no spark
What controls the route of the coolant?
Thermostatic valve assess the temperature
Propeller pitch’s
Fine
Centrifugal twisting moments
Oil from CSU
Coarse
Counter weight producing CTM
Spring in propellor hub
How is oil pressure regulated?
Electrically operated governor valve in the csu controlled by FADEC
What prevents back flow of oil in negative g flight and maintains oil pressure to csu .
Capillary tube
Feathered position
Start lock
Pitch’s
Approx 81
Approx 15
If the ECU malfunctions what could happen to the prop?
Could remain stuck at the start lock position .
Affected prop will produce negative thrust
Will over speed if power is applied
Engine Master on
Energises the associated engine start circuit which:
- powers the associated glow plug
- l or r engine glow advisory alert
- opens unfeathering accumulator shut off valve
- energises the engine and propellor control circuits
Fuel pump system
Lower pressure fuel pump draws fuel from tanks to high pressure fuel pump for the fuel injection system
What is a check and pressure relief valve?
Where are they located
Check valve alows air into the fuel tank
Pressure relief
Underside of the wing tips
Fuel for use in CTc ops
Jet A1
Fuel measuring
X2 capacitance fuel sensor each wing
Fuel drain locations
1 just outboard of the engines (inboard of the fuel tanks)
1 below engine in the sediment drain bowl attached to the LP fuel filter
What is the minimum radius of turn using brakes?
6m
30 degrees nose wheel steering
52 degree with brakes.
Alternators
Supply 28v dc
Pumps for anti ice
2 pumps for aero foil and prop
2 separate pumps for windshield
Located in the nose
Why might the de ice pressure warning remain?
If high mode is selected and ambient temp is above 10deg
