DOJET GROUND SYSTEMS Flashcards
(155 cards)
1
Q
BAGGAGE COMPARTMENT
A
Forward 882 lbs
Aft 771 lbs
2
Q
Can you pressure refuel with airplane power off?
Why?
A
Yes, power supplied from RH Hot Battery Bus
3
Q
Boarding Lights Which Battery Bus, and considerations
A
Left hot battery bus.
On timer…3-5 minutes,
If “on” or “off” selected, regular airplane power, not battery
4
Q
Stair Lights
A
Always on hot battery bus, Left.
5
Q
Infant Considerations
A
3 allowed, in left row. Not consecutive rows, and not in first, last or exit rows. (It’s because of the drop down mask…2 on each side and there are two seats on the right side of the plane)
6
Q
Is galley essential power
A
Nope
7
Q
Which doors have 2 proxy sensors?
A
3…main, galley, & baggage
8
Q
Exit Doors are
And have how many proxy switches?
A
Type 3…you throw them out
1 proxy switch
9
Q
Air start, and cabin air doors. What type of switches?
A
Micro switches. They are monitored on the EICAS
10
Q
Turning radius and required pavement
A
97 (or 100) feet wing clearance…
50 feet of pavement
11
Q
Minimum Crew
A
- Pilot and copilot
12
Q
Max occupants
A
37
13
Q
Minimum TAT
A
-52 C
14
Q
Takeoff and Landing MSL
A
-1000 to 8000 ft
15
Q
If ambient temperature -30 or below what must you perform?
A
The Hydraulic Leakage Test
16
Q
What is Cold Soaked, and considerations?
A
-30 or below for 7 hrs or more.
Must perform precautions after prolonged exposure
17
Q
G limits
A
Flaps Up. -1 to +2.65 G
Flaps down. 0 to +2.0
18
Q
Max Ramp
A
34789
19
Q
Max T/O Weight
A
34524
20
Q
Max Landing Weight
A
31724
21
Q
Max Zero Fuel Weight
A
28814
22
Q
Max Altitude
A
31k, or 35k depending on mod
23
Q
Max Take off altitude
A
8k, or 9200
24
Q
Runway slope
A
2 degrees up or down
25
Max tailwind
10 knots
26
Maneuvering Speed Va
190
27
Rough Air Speed
200 or .50
28
VMO
< 8k - 270
8-10 - 300
>10k - .66
>34k - .64
29
Flights above 27k are limited to
Less than 3 hrs. (Ozone)
30
Flaps 12
205 mod 10
| 200 mod 0
31
Flaps 20
180
32
Flaps 32
160
33
Gear Speed
200, all ops
34
Tire speed
180 ground
35
Wiper speed
166
36
Emergency Light Power
4 six volt batteries
| 28 hrs to recharge!
37
Emergency lights last how long on battery?
10 minutes
38
Pax oxygen masks auto drop when?
Cabin altitude of 13,800
39
What engine, and thrust?
Pratt 306B.
| 6050 lbs
40
Vent cycle is how long?
60 seconds
41
Start Valve psi to start
Book...12
| SOP...21
42
You get a FADEC minor fault that doesn’t clear....
150 hr limit
43
What the hell is an HMU?
Hydro Mechanical Unit
Well, really a fuel controller
44
Fuel Nozzles
24 total
| 2 for start
45
Engine Fire bottles
2 per engine, Halon
46
High pressure bleed air station is
3.0
47
Low pressure bleed air station is
2.5
48
What’s on the Accessory Gear Box
A bunch of crap.
```
3 Electric (alternator, alternator, generator)
3 Oil (pressure, scavenge breather)
Starter
Fuel pump (not really, but driven by the same shaft)
```
49
Max CONTINUOUS ITT
920, no time limit
Takeoff with both turning is also 920 but 5 minute limit
50
Max transient ITT
930 for 20 seconds
51
Max ITT start
950
52
Do you have to open cross bleed for start
No, FADEC does it
53
Oil Temp Before Takeoff
26c
54
Flight idle
| Ground idle
65
| 57
55
Min oil temp
-40
56
Oil pressure normal
35-110 psi
57
Starter Limits
```
2 within 10 then
10 minute cool down.
However....
Motoring 2 minutes accumulated then
20 minute cool down
```
58
PSI to start
21, company
59
Ignition cuts off at
40% n2
60
APU master button does what?
Opens the APU fuel shutoff valve
| Powers the ECU
61
APU START SEQUENCE
Start until 50%
| Ready at 94.5% plus 3 to 5 seconds
62
APU use in flight requires
Monitoring of APU on MFD
63
APU On ground auto shutdown reasons:
Over over over, low high loss
```
Over speed
Over temp
Over current
Low OIL pressure
High OIL temp
Loss of data. RPM OR EGT
```
64
When can you restart APU
2 minutes after COMPLETE roll down, shutdown.
65
APU bleed air use after start limit
Wait one minute
66
APU Bleed Use
When engine running do not use APU bleed, except for takeoff if necessary
67
APU Altitudes
Operating...30k
| Start....20k
68
APU Start Attempts
3 attempts, 1.5 minute starter time total
2 minutes in between
1 restart with no CAS MESSAGE
No restarts with a cas message
69
What happens when you cross feed
From side turns on elec pump
Cross feed valve opens
Low side electric pump disabled
Low side motive flow valve closes
70
No crossfeed when?
Take off approach and landing
71
Max fuel imbalance
310
Blue warning at 260
72
Fuel max
7800 auto
7970 manual or over wing
73
Refuel de fuel max pressure
Auto. 50 psi
Manual 20 psi
Defuel -10 psi
74
Min SAT for fuel
-63 C
75
Main Batteries
24 volt, 40 amp, Nicad
76
Minimum Battery Acceptance voltage
22...must be removed at 18
77
Battery Overtemp
70c
78
Can batteries be charged with External Power
No, a generator must be online
79
Generator comes online when
55% n2
80
Generator rating...Engine, APU
28.5 400amp
With ground idle...320amp. Must turn off one pack and recirc fan
81
What is BPCU
Bus Power Control Unit
Runs all power
82
External Power
Has priority and is sole source of power if selected.
28v
Note...will NOT charge batteries
83
Where does essential bus get power
Either DC bus but only one at a time. Bus 1 is the default.
Will switch to bus 2 if power drops 3 volts below the other
OR, the TRU.
84
What are change over relays?
They allow switching from one bus to another
85
Engine Driven Alternators
400hz 90 amp. “Wild Power”
86
TRU amp limit
150amps
87
A/C Powers What?
H,H,H,H
Hydraulics and 3 heat (ice probe, windshield, and horn)
88
Inverter 1 powered from
Essential DC bus
89
Inverter 2 powered from
Non Essential Bus 1
90
Inverter powers what consumers?
Talks, Points, or Listens
```
EGPWS
TCAS
trim pointers
FDR
CVR
```
91
Battery Life in emergency
Battery only. 30 minutes
| With TRU, 60, with certain CB’s pulled
92
Hot Battery Bus Items
Lights...stair, dome, baggage
Fire...ignition, squibs for all bottles
Fuel..fuel shutoff valves
Brains...avionics memory and BPCU
Right has all above plus
Comms...comm 1 and ACARS
Fuel...Fueling panel
93
What are Jet Packs
Back up batteries...24volt. Lead acid
94
Backup Jet Pack
Powers the BPCU
95
Emergency Jet Pack
Powers Standby Instruments
96
GCU FUNCTIONS
```
VORLOG
Voltage regulator
Overvoltage protection
Reverse Current protection
Load Sharing
Over Current
Ground Fault...,or a short to the rest of us
```
97
Hydraulic normal pressure and flow
3000psi.
| 2. 5 gallons a minute
98
Hyd. system a items
AOL
Alt brakes
Outboard Spoilers
Landing Gear normal
99
Hyd system B items
```
BEERFIN
Brakes
Emergency Brake
Emergency Gear
Roll Spoilers
Flaps
Inboard Spoiler
Nose wheel steering
```
Brake Brake, Gear Steer, flaps spoiler spoiler
100
Accumulator Charge minimum
1740.
| Or 1800 if you like
101
Why two accumulators on Right?
One for Parking Brake
102
Parking Brake how many times with no hyd. Pumps?
6 Times
103
Hyd reservoir capacity...and what is low, for message
1.8 gallons
| Low is .6 gallons
104
How does landing gear handle operate gear
Electrically controlled, hydraulically actuated
105
What holds gear up
Mechanical over center locks. But unlocked with hydraulics
106
How do you select Alt Brake system
Manual, or it’s automatic if B system falls below 1900 psi
107
How do you activate alternate auto skid
Just select Alt brake. It’s in the system
108
Max Gear Operation Altitude, with exception
18k, except emergency descent from above 31k
109
Brake Temp high temp
225c
110
Emergency Gear operation, main handle consideration
Gear will come down with normal gear handle still up, but some systems will not function normally.
Gear down and locked still works, but...not anti skid, ground spoilers, etc
111
What happens when you push Engine Fire Button
```
BIGFMS
Bleed Air Shutoff
Ignition off
Generators offline
Fuel Shutoff Valve
Motive Flow Shutoff
Squibs Arm
```
112
What happens when you push APU Fire Button
BGFS
Bleeds off
Generator Offline
Fuel shutoff valve
Squibs Arm
113
Indications during Engine Fire Test
```
Master Warning
RWP LIGHT
ENGINE FIRE BUTTON LIGHT
SQUIB LIGHT
FIRE BELL
```
114
What indications during Fail/AGN test
AGN Light
| Loop Fail illuminates
115
Which Fault Warning Computer generates PFD and T/o config warning
FWC 1
116
Autopilot Altitudes...
100 ILS
200 NP
500 climb cruise descent
117
Deice cycle times
Fast, one cycle per minute
| Slow, one cycle per 3 minutes
118
Deice cycle selection fast or slow temps
Fast >-20c
| Slow
119
Ice detector probe power
AC BUS 2 (right side)
120
Can you run deice at ground idle with one engine running?
No
121
Bleed Air Pressure at Low and High Power settings
High pressure when low, (3.0)
| Low pressure when high (2.5)
122
Packs...when are ground cooling fans on
Below 120 knots.
Power from its side...right is right...nonessential 1
Left is left..nonessential 2
123
What is the difference between manual temp control and auto?
There are no protections in manual except overheat.
124
When must you use high flow mode (cabin air)
24 or more people onboard
125
What’s the difference between the front and aft outflow valves
Both are pneumatically actuated...but aft is electrically controlled whereas front is pneumatically controlled and actuated.
126
You press dump...cabin will drop to what max altitude.
14,500
127
Max differential pressure
6. 9. Mod 3.10
| 7. 6. Mod 3.50
128
Max negative pressure
-0.3
129
When do you get cabin Alt RWP
9500 cabin
130
Full 02
1825
131
When do pax masks deploy?
13,800
| 02 stops flow when cabin gets to 10k
132
When do you get o2 RWP
```
45 psi crew
OR
Less than 2.5 psi at pax AND
pax deployed
AND
cabin exceeds 14k
```
133
When do you get gear warning
Less than 400 AGL and less than 45 degree thrust lever angle
134
What causes gear unlock warning
Gear position disagrees with handle position
135
Gear Speed
200
136
What speed does rudder spring tab unlock
160
137
What speed do elevator trim motors switch between slow and fast
200
138
Stick pusher inhibited:
10 seconds after takeoff and
| Within 100 AGL
139
Max differential pressure
6. 9 mod 0
| 7. 6 mod 10
140
Max differential for landing
.40
141
Single Pack ops max Alt
25k
142
Max Alt APU only bleed source
17k
143
Max Attitude difference between PFD’s and standby attitude indicator
3 degrees. No takeoff if exceeds
144
FADEC Minor time limit
150 hrs
145
Takeoff inhibit logic for cautions and status
After 70 knots...
| Waits 20 seconds or 400 AGL, whichever is first
146
It’s hot, >35 c, you shut APU down...leave bleeds on how long before shutting down packs.
2 minutes...
147
Icing...avoid what temps
-2 to +2
148
EGPWS and wind shear inhibited above
1500 AGL
149
PBE’s provide how much time
15 minutes, depending
150
Pack overheat
220 c
151
1/2 bank limits to
17 degrees and only in heading mode
152
Stick pusher inhibited
ON GROUND, to 10 seconds after liftoff, also below 100 AGL
153
Takeoff config checks what
Flaps
Spoilers
Trim (elevator)
Brake
154
Landing warning when
Under 400 ft, thrust levers back, gear not down and locked
155
To work TCAS needs
```
One transponder
One ADC
One PFD
Radio Altimeter
One MFD
```
