1VNE 16400ft and upper
200 kt
2VNE MID 13101 16400ft
214 kt
9Vertical LDG speed
<1000 ft/min
12Height (gear down)
2,57m
16Angle of incidence
0 deg
17Propeller diameter
1,98m
19Hor Empennage span
3,80m
20Hor Empennage Surface
3,04 m2
21Hor Empennage Dihedral
0 deg
22Vert Empennage Surface
1,632m2
24 Turbulent wind advised speed
172 kt
26 positive and negative school load factor limits
+5g/-3g
27 GROB 120 balance limits in utility
Avant 24,6% arrière 28,9%
28Why is a sudden and brutal handling of the throttle lever strictly prohibited ?
Because it induces vibrations and torque on the crankshaft which can lead to its
rupture.
29What is the maximum over speed RPM tolerated?
2970 tr/min max 3seconds
30What are the two particularities of the oil circuit ?
Lubrication is ensured during inverted phases, lubrication oil is also used for
propeller pitch regulation.
31 The CHRISTEN assembly is composed of … ?
A ball valve, an oil separator and a suction screen with a plug
32 What is the role of the thermostatic valve ?
When the engine oil reaches 85,4°C, it opens and the oil flows towards the oil
cooler.
33 Start-sequence limitation of the engine starter ?
3 attempts, 1’ , 1’, 15’ delay
34 propeller clearance
0,27m
35 P/S HEAT amber lighting ON mean?
Pitot heat is on failure
36How works the seat and harness ?
When the inertial reel control lever is in a forward position, your harness is
unlocked, it automatically locks in case of shock.
37How works the Air conditioning system?
The heating circuit is composed of : 1 Exchanger, 1 mixer, 1Distributor 2 control
levers (temperature, distribution) located on the left hand console.
38Deflection of Flight controls
Ailerons can travel 20° up and 21° down. The right and left aileron are fitted with a
manoeuvring tab.
39Fuel press red warning
The « fuel press » red warning light is ON when the fuel pressure down stream of
the fuel mechanical pump is less than 14,5 PSI.
40How works the gear motion ?
In normal functioning, gear motion is ensured by 3 dual actuating cylinders with
mechanical claws.
41Why is a sudden and brutal handling of the throttle lever strictly prohibited ?
Because it induces vibrations and torque on the crankshaft which can lead to its
rupture.
42What is the maximum over speed RPM tolerated?
2970 tr/min max 3seconds
43 What are the two particularities of the oil circuit ?
Lubrication is ensured during inverted phases, lubrication oil is also used for
propeller pitch regulation.
44The CHRISTEN assembly is composed of … ?
A ball valve, an oil separator and a suction screen with a plug
45What is the role of the thermostatic valve ?
When the engine oil reaches 85,4°C, it opens and the oil flows towards the oil
cooler.
46 Start-sequence limitation of the engine starter ?
3 attempts, 1’ , 1’, 15’ delay
47What are the 2 air pressures applied on the air membrane of the membrane
regulation system ?
Total pressure and static pressure.
48What kind of ignition system is fitted on the GROB 120 ?
2 single magnetos.
49What is the purpose of the magneto cut-off test ?
For safety reasons.
50What happens to the propeller pitch when oil is driven towards the propeller pitch
mechanism ?
It turns towards the high pitch
51What is the VHF frequency band ?
118 - 136,975 MHz
52 On the VHF, with a 25KHz step, how many possible channels can be displayed ?
760
53 On the VHF, with a 8,33 KHz step, how many possible channels can be displayed ?
2280
54How wide is the UHF frequency band ?
225 - 399,975 MHz
55How is powered and step between freq on COM 3 ?
The UHF is powered by avionic bus 2, step between frequencies is 25 KHz.
56What is the ADF frequency band ?
200KHz - 1799KHz
57What is the VOR frequency band ?
108 - 117,95MHz
58What kind of transponder is to be found on the Grob 120 A-F ?
S Mode, the transponder transmits the 4 digit code, pressure altitude, and aircraft
code
59Dealing with the audio control unit, which statement is correct ?
In reception, you may listen to all the radio sets.
60 On the UHF, to shift from the frequency mode to the channel mode, you must press
the …… key ?
Channel
61Which bus supplies the landing light ?
Battery Bus
62What are the positive and negative manufacturer load factor limits?
+6g -4g (aero) ; +4,4g -1,76g (utility)
63Which attitude and direction instrument are fitted in the GROB 120 ?
Magnetic compas, gyrocompas system, stall warning, Electronic Horizontal
Situation Indicator (X2), electric Attitude Indicator, pneumatic attitude indicator,
G meter, Turn and slip indicator(X2).
64 If : Battery : ON
Alternator : OFF
BUS TIE : MAN
AVIONIC MASTER : OFF Then, which elements are powered by the battery ?
Battery Bus + Main Bus
65 In flight, when « AVIONIC EMERGENCY » is ON, which elements power
AVIONIC 1 and 2 ?
The RCCB battery directly supplies Avionic 1 and RCCB alternator supplies
Avionic 2
66 On the apron, the ELT switch inside the cockpit must be on the …… position ?
ARMED
67Which BUS powers the flaps?
BATT BUS.
68Where is the alternate static port located ?
Next to the right exhaust pipe.
69 On the EDM 930, the green arc of the voltmeter corresponds to … ?
22 - 29.5 volts.
70When the « FIRE FAULT » warning light is ON, it means that … ?
The fire detection system is faulty.
71When the ELT is set to .« ON », which statement is correct ?
ELT transmits on 121.5 MHz and 243 MHz, 406 MHz after 50 sec and every 50
seconds during 24hours
72How is ensured the canopy closing ?
Canopy closing is ensured by an outside and an inside lever ; the canopy is equipped
with a safety lock and fitted with an emergency canopy jettison system.
73Elevators deflection
Elevators can travel 23° up and 26 down. The right elevator only is fitted with a
manoeuvring tab.
74Fuel press red warning
The « fuel press » red warning light is ON when the fuel pressure down stream of
the fuel mechanical pump is less than 14,5 PSI.
75Limitations for vertical flight (vertical climb or dive)?
10 seconds
76What is the role of the release valve in the oil system?
It regulates the engine oil pressure.
77What is the oil capacity?
minimum 8 US Ìt / recommended 10 US Qt
78Why would you use the alternate air ?
You pull alternate air when the air is subject to icing and if power loss
79if Throttle control, Pitch control (propeller)
and Mixer level break ?
Full power, low pitch, full rich
80What kind of ignition is supplying the GROB 120 during the starting phase ?
The left magneto with a retarded ignition.
81About COM 3, what happens when using main ? ( question bizarre)
MN annunciator, ON when using Main
82Transponder, press and hold the VFR button:
Reset the VFR code.
83Draw the different antennas
84What is the minimum voltage for a self-start up?
22 volts
85When the external power source is ON, what’s about the battery?
Battery is being charged
86Which gazes are in the pneumatic sensor of the engine fire extinguisher?
Helium and Hydrogen
87On the EDM 930, the green arc of the yvoltmeter corresponds to ...? (voltage values)
22-29,5 Volts
88In which condition the « FIRE » warning light appears?
Fire between 245°C and 500 °C around the engine (à verifier)
89When the ELT is set to. « ON», transmission and times values ?
ELT transmits on 121.5 MHz and 243 MHz, 406 MHz after 50 sec and every 50
seconds during 24hours
90In which condition the bus tie warning appears?
The bus tie warning appears when the swich is off.