Boeing 737 Systems Flashcards
(121 cards)
1
Q
What is the max takeoff weight for the 737?
A
174,200 lbs.
2
Q
Is it possible to always take off at the max weight?
A
No, it depends on multiple factors.
3
Q
What are some factors that affect takeoff performance? (RAFTCAME)
A
- R – Runway length and slope
- A – Airport elevation
- F – Flap setting
- T – Temperature
- C – Contaminated Runway
- A – Air conditioning packs off
- M – MEL/CDL items
- E – Engine anti-ice on
- (Wind)
4
Q
What is a runway analysis?
A
A document used to determine the maximum takeoff weight for a flight.
5
Q
What is the standard flap setting for takeoff in the 737?
A
15 degrees.
6
Q
What other flap settings are available on the 737?
A
- A degrees
- 25 degrees.
7
Q
What effect does snow, ice, or slush on a runway have on takeoff performance?
A
Decreases performance and increases takeoff distance.
8
Q
Are the AC packs normally on for takeoff?
A
Yes, but they can be turned off to achieve a higher max takeoff weight.
9
Q
If the air temperature increases, how does it affect takeoff?
A
Performance worsens and there is a penalty to the max takeoff weight.
10
Q
What is Center of Gravity?
A
The point at which all of the weight of an object is considered to be concentrated.
11
Q
What is MAC?
A
Mean Aerodynamic Chord, an imaginary chord from the nose to tail of the aircraft.
12
Q
Where can you find the CG of a 737?
A
Between the wings within the CG envelope.
13
Q
What is STAB Trim?
A
Adjusts the stabilizer for the best nose up setting for takeoff.
14
Q
Why do we need to calculate CG?
A
To ensure the aircraft is balanced for takeoff.
15
Q
How many emergency exits are on the 737?
A
10 total.
16
Q
How many crash axes are on the 737?
A
1 – in the cockpit.
17
Q
How many passengers can the 737 normally carry?
A
189 economy seats.
18
Q
How many cargo areas are there on the 737?
A
4 – 2 forward and 2 aft.
19
Q
How many oxygen systems are on the 737?
A
2 – one cockpit system and one passenger system.
20
Q
What are the primary flight controls on a 737?
A
- Elevators
- Ailerons
- Rudder.
21
Q
What do elevators control?
A
Pitch.
22
Q
What do the ailerons control?
A
Roll.
23
Q
What do the rudders control?
A
Yaw.
24
Q
What are the secondary flight controls on the 737?
A
- Flaps
- Leading Edge Devices (LEDs)
- Spoilers.
25
What do flaps and LEDs do?
Create lift during takeoff or landing.
26
Are spoilers used during takeoff?
No, they destroy lift.
27
What do spoilers do in flight?
Destroy lift, enabling descent.
28
What are the functions of yaw dampers?
Prevent 'dutch roll' while in flight.
29
What is the Maximum Mach # of the 737?
.82 Mach.
30
What is the Maximum Operating Altitude of the 737?
41,000 ft.
31
What is the max tail wind component for takeoff and landing?
10 kts.
32
What is the max field elevation for takeoff and landing?
8,400 ft.
33
What are the minimum and maximum temperatures the 737 can operate in?
* Min temp: -54C
* Max temp: 54C.
34
What is the max crosswind component for the 737?
* With winglets: 33 kts
* Without winglets: 36 kts.
35
What is an APU?
Auxiliary Power Unit.
36
Can the APU be used during flight?
Yes.
37
What is the runway slope limitation for the 737?
+/- 2%.
38
What is the Basic Operating Weight for the 737?
96,100 lbs.
39
What is the max Zero Fuel Weight of the 737?
136,000 lbs.
40
What is the max Landing Weight of the 737?
144,000 lbs.
41
What is the max Taxi Weight of the 737?
174,700 lbs.
42
How many hydraulic systems are there on the 737?
3 total: A, B, and Standby.
43
Which engines have hydraulic pumps?
Engines 1 and 2.
44
How many and what type of pumps does the A hydraulic system use?
2 pumps: 1 engine and 1 electrical.
45
How many and what type of pumps does the B hydraulic system use?
2 pumps: 1 engine and 1 electrical.
46
How many and what type of pumps does the Standby hydraulic system use?
1 electric pump.
47
What equipment is on the A hydraulic system?
* Ailerons
* Landing Gear
* Elevators
* Alternate (Manual) Brakes
* Rudders
* Nose Wheel Steering
* Inboard Flight Spoilers
* Number 1 Thrust Reverser
* Ground Spoilers.
48
What equipment is on the B hydraulic system?
* Yaw Dampers
* Elevators
* Ailerons
* Rudder
* Outboard Spoilers
* Flaps
* Brakes
* Autoslats
* LEDs
* Landing Gear (retract only)
* Alternate Nose Wheel Steering
* Number 2 Thrust Reverser.
49
What equipment is on the Standby hydraulic system?
* Rudders
* LEDs
* Standby Yaw Damper
* Number 1 and 2 Thrust Reverser.
50
Is there a backup to nose-wheel steering?
Yes, the main is on system A and an alternate is on system B.
51
If the A hydraulic system is lost, how can the landing gear be lowered?
Crank until the locking mechanism releases.
52
If the A hydraulic system is lost, how can the landing gear be raised?
The B hydraulic system can retract the landing gear.
53
If both the A and B hydraulic systems are lost, is there a backup for the Ailerons and Rudders?
Yes, through manual reversion.
54
Is there a backup for the Rudder if the A hydraulic system fails?
Yes, the rudders can be operated by all three systems.
55
Which system supplies hydraulic power to the brakes?
The B system.
56
What is the normal operating pressure for the hydraulic systems?
3,000 psi.
57
What is the most common cause of a hydraulic system failure?
A leak in the reservoir or a ruptured hydraulic line.
58
How many electrical generators are there on the 737?
3 total.
59
How many power sources may be available to an aircraft parked at its gate?
6 total.
60
What kind of battery does the 737 have?
24-volt nickel cadmium battery.
61
What is an IDG?
Integrated Drive Generator.
62
If both generators are lost in flight, how long will the battery work for?
60 minutes total.
63
How many fuel tanks are on the 737?
3 tanks.
64
How much fuel does each tank hold?
* Wing tanks: 9,100 lbs each
* Center tank: 30,500 lbs.
65
What is the maximum planned imbalance between the wing tanks?
* None on the ground
* 1,000 lbs. in flight.
66
In what order are the tanks filled when fueling?
Wing tanks must be filled before the center tank.
67
How many electrical fuel boost pumps are on the 737?
6 total.
68
Can the 737 dump fuel?
No, there is no fuel dump system.
69
Can fuel be transferred from tank to tank while in flight?
No, but you can cross feed.
70
How is the 737 pressurized?
Using AC Packs that mix outside air with hot bleed air.
71
How many Air Conditioning Packs are on the 737?
2 – left and right.
72
How many outflow valves are on the 737?
5 total.
73
Which outflow valve can be manually closed on the 737?
The main outflow valve.
74
What is the maximum altitude the 737 may be dispatched to with both AC packs inop?
10,000 ft.
75
Which engines provide bleed air to the AC packs?
Both main engines.
76
What is the altitude at which the 737 can operate if both AC packs are inoperative?
14,000 ft
## Footnote
Check the AFM for confirmation.
77
Can a flight be dispatched with 1 or both AC packs inoperative?
Yes, but always check the MEL!!
78
Which engines provide bleed air to the AC packs on the 737?
Both main engines.
79
Where are the AC packs located on the 737?
Located in the belly (underside) of the aircraft, just forward of the main landing gear.
80
How many anti-ice systems does the 737 have?
2 – Bleed Air and Electrical.
81
What equipment is electrically anti-iced on the 737?
* Pitot Tubes
* Temperature Probes
* Alpha Vane
* Engine Intake
* Windows, Windshield, Doors
* Water and Toilet Drain
82
What is Hot Bleed Air?
Hot air that is siphoned off each engine.
83
What equipment is pneumatically anti-iced on the 737?
* Engine Cowlings
* Inlet Guide Vanes
* Wing Thermal Anti-Icing System
84
Which engines provide hot bleed air to the wing anti-ice system on the 737?
Both Engines.
85
Can the 737 be dispatched into known or forecasted icing conditions?
Yes, but only light or moderate.
86
When do icing conditions exist according to Boeing?
When the temperature is 10C and below and there is visible moisture.
87
Why are the antennas anti-iced?
To prevent ice build up and the possibility of the antennas breaking off and flying into the engines or fuselage during flight.
88
Where is the wing anti-iced on the 737?
Around the leading edge (LEDs).
89
What is a major function of windshield heat?
Protection from Bird Strikes.
90
Does the 737 have de-icing capabilities?
No.
91
How can you de-ice an aircraft?
De-icing is done on the ground by spraying chemicals on the aircraft.
92
How many engines are on the 737?
2 engines + 1 APU.
93
How much thrust does each engine produce?
26,400 lbs of thrust.
94
What model engines are on the 737?
General Electric – CFM56.
95
What is an APU?
APU – Auxiliary Power Unit; provides Bleed Air for the AC packs, electrical power, and engine start.
96
Which fuel tank normally fuels the APU on the 737?
Tank 1 (the Left Tank).
97
Where is the APU located?
In the tail section of the aircraft.
98
How can pilots monitor the amount of thrust produced by an engine?
Using the EPR (Engine Pressure Ratio) in the cockpit.
99
How is the APU started?
Via electrical power from the battery or an outside electrical source.
100
How do jet engines work?
Suck, Squeeze, Bang, Blow.
101
What areas on the 737 are equipped with fire detectors?
* Engines
* Lavatories
* Landing Gear Wheel-Wells
* APU
* Cargo Areas
102
What areas on the 737 have fire extinguishers?
* Both engines
* Cargo hold (shares 1 bottle)
* APU
* All 3 Lavatories
103
If a fire were to develop in the wheel-well, how could it be extinguished?
By lowering the landing gear to allow airflow to blow the fire out.
104
How many fire extinguisher bottles are there for the 2 engines?
2 total – one for each engine.
105
Does the APU have its own fire extinguisher?
Yes.
106
How many hand-held fire extinguishers are in the passenger cabin?
6.
107
How many passenger exits does the 737 have?
Two (2).
108
What is the function of the Tail Skid?
To protect the tail section of the aircraft during takeoff and landing.
109
What is the function of the Anti Skid system?
To prevent or minimize skidding during landing by adjusting brake pressure.
110
How many pitot-static systems are there on the 737?
Three.
111
What are the 3 pitot-static instruments on the 737?
* Airspeed Indicator
* Vertical Speed Indicator (VSI)
* Altimeter
112
What are the 2 gyroscopic instruments on the 737?
* Directional Gyro (DG)
* Attitude Indicator
113
What is a radar altimeter?
Provides the altitude of the aircraft above the ground (AGL).
114
What is a CDI?
CDI – Course Deviation Indicator.
115
What is a DG?
DG – Directional Gyro.
116
What is the HSI?
HSI – Horizontal Situation Indicator.
117
What is the RMI?
RMI – Radio Magnetic Indicator.
118
What is the HDI?
HDI – Horizontal Deviation Indicator.
119
What is an EFIS?
EFIS – Electronic Flight Instrument System.
120
What is the purpose of weather radar?
To show areas of precipitation, clouds, storms, and other weather phenomena.
121
What is the FMS?
FMS – Flight Management System.
