Systems

Question 1

Accessory Drive Gearbox Components

Answer 1

Components (3 pumps, 3 generators, 1 starter)
Fuel Pump and Metering Unit (FPMU) (pump)
Oil pump (pump)
Hydraulic pump (pump)
2 (engine driven) electrical generators (2 generators)
Permanent Magnet Alternator (PMA) (generator)
Air turbine starter (starter)

Question 2

How is the accessory gearbox connected?

Answer 2

mechanically linked to the N2 compressor via the tower shaft

Question 3

what is the Oil Tank Capacity and minimum quanities?

Answer 3

Capacity: 12 qts
Minimum oil quantities:
8 qts at Hub
7qts at Out-station
6 qts for Takeoff
Amber indications displayed on MFD at 5 qts

Question 4

What does the Permanent Magnetic Alternator (PMA) power?

Answer 4

Ignition >10% N2
No alternate power source for the ignition system
FADECs > 50% N2
< 50% N2 (or if the PMA fails): the FADECs are powered by Essential DC busses

Question 5

When do igniters start?

Answer 5

14% N2

Question 6

Select ignition ON for:

Answer 6

Engine shut down for more than 90 minutes; and

Temperature < 5°C

Question 7

Check engine parameters:

Answer 7

(2, 4, 6, half, Ts and Ps, Vibration)
2 N1 – approx. 20-29% N1
4 ITT – approx. 400°-499°
6 N2 – approx. 60-69% N2
Half of 6 = 3 FF – approx. 300-399pph
Oil Pressure
Oil Temperature
Vibration

Question 8

Abnormal Engine Start – abort engine start immediately when:

Answer 8

• No lightoff (ITT does not rise) within 10 seconds after first fuel flow indications (on ground only)
• ITT approaches start limit
• N2 decreases or remains steady for more than 30 seconds (hung start)
• N2 indicates no rotation up to 10 seconds after the start command
• Any unusual noise or vibration occurs
• Engine instruments indicate abnormal conditions
• Flames are visible from the exhaust pipe
• Oil pressure does not reach at least 34 psi after the engine reaches stabilized idle

Question 9

Pack valve(s) will automatically close if any of the following occur:

Answer 9

(IGOPEPEB):
I – Icing below 24,600 ft (PACK #1)
BLEED #1 powers wing heat, stab heat, and PACK #1, so PACK #1 will be shed to provide adequate anti-icing protection
G – Go Around Scenario (or non ALT T/O takeoff)(BOTH)
< 1700’ AGL
Engine bleeds on
TO-1 or higher
All available thrust goes out the tailpipe
EP/LR – you will have to manually reset PACKs
XR – PACKs will go back on automatically
O – One Engine Inoperative below 9700’ (BOTH)
Unless APU closed
Inoperative engine PACK is not on (not receiving air)
Other engine closes EBV so that all available thrust is being used out the tailpipe
P – Pack Overload
E – Engine Start
Any pack on the side being started, it will be shut off until start is complete
P – Pack Overheat
E – Essential Power
Not a part of automatic shut-down logic; however, the PACK will not operate without an electrical signal or pneumatic pressure
B – Bleed Source Lost
Not a part of automatic shut-down logic; however, the PACK will not operate without an electrical signal or pneumatic pressure

Question 10

Icing takeoffs:

Answer 10

Temp < 10°C and ANY of the following:
Ceiling ≤ 1700’
Visible Moisture
≤ 1 SM visibility
Contaminated Runway

Question 11

What does pulling the Fire Handle do?

Answer 11

Acronym: HALF
Hydraulic shutoff valve CLOSED – same one we have control over on hydraulics panel
Air (Bleed Air Valve) – same one we have control over on pneumatics panel
Does not illuminate light on switch
Lip (Engine Lip Anti-ice Valve) – same one we have control over on pneumatics panel
Does not illuminate light on switch
Fuel Shut Off Valve – in belly
Memory item complete should have closed valve at FPMU

Question 12

How many fire bottles are there for the baggage compartment? Where are they located?

Answer 12

Two fire extinguishing bottles installed in the rear electronic compartment:
The high rate discharge bottle (little bottle) is designed to instantaneously fill the baggage compartment
The metering rate discharge bottle (big bottle) provides extinguishing agent concentration for at least 50 minutes