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PC-12 Legacy > Engine, Fuel, Prop > Flashcards

Engine, Fuel, Prop Flashcards

1
Q

Mfg and Name of engine:
___ SHP but flat-rated at ___ SHP
___% of thrust from exhaust
Installed __ degrees L or R and __ degrees Up or Down

A

Pratt and WHitney, PT6A-67B
1600 SHP, flat 1200 SHP
6% of thrust by exhaust
2 degrees down and to the right

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2
Q

Compressor section:
__ stage axial
__ stage ___ impeller
__ stator vane assemblies

A

4 stage axial
1 stage centrifugal impeller
4 stator vanes

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3
Q

Turbine section has 2 types of turbines,
(A) ___ (which runs the __ and __) and
(B) ___ (which runs the __ and __)
The ___ reduces turbine speed (Nf) to a speed suitable for the prop

A 
Compressor 
- compressor rotor 
- accessory gearbox (all except prop governors)
Power turbines
- Exhaust duct
- Reduction gearbox (reduces Nf)
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4
Q 
Torque (Q) indicator:
_ to _ is green
_ to _ is yellow
*T/O and Transient (Red) >/= \_\_
*Red diamond at \_\_
*\_\_\_ second time limit
A 
Torque (Q) indicator:
0-37 is green
37.1 to 44.4 is yellow
*T/O and Transient (Red) >/= 44.4
*Red diamond at 61
* 20 second time limit
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5
Q

Engine Start:

  1. If no ITT rise w/in __ “ of cond lever to idle = __
  2. If ___at fuel intro, __
A

If no rise w/in 10”, shut down and see checklist

If rapid ITT rise at fuel intro, shut down and see checklist

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6
Q 
ITT Indications
Green from \_\_ to \_\_
Yellow from \_\_ to \_\_
Red from \_\_ to \_\_
Red diamond at \_\_\_\_
A

Green from 400-760
Yellow from 760-800
Red from 800-1000
Red diamond at 1000

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7
Q

Hung Start is when ___ stops increasing below ___.
Advance ___ to __ idle then back to __ once engine reaches min idle.
If not successful w/in ___ “ then shut down

A

Hung Start is when Nf stops increasing below Ground Idle (50.7%) or Flight Idle (64%).
Advance condition lever to flight idle then back to ground idle once engine reaches min idle.
If not successful w/in 10 “ then shut down

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8
Q

Ng (Gas Generator Speed) indications.
% of ____ RPM (max compressor section)
Green from __ to __
Red line at ___

A

% of 37,468 RPM
Green from 60-104%
Red line at 104%

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9
Q 
Oil temps (degrees C)
Green arc from \_\_ to \_\_
Yellow from \_\_ to \_\_ (transient)
Red limit at \_\_\_
Best oil service life from \_\_ to \_\_ range
A

Green arc from 10-105
Yellow from 105-110 (transient)
Red limit at 110
Best oil service life from 60-70 degree range

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10
Q

Oil Pressure (PSI)
Green from _ to _
Yellow from _ to _
Red at __ (upper limit of low pressure)
Red diamond at __ (min press + low transient limit) and __ (max pressure and transient)
Transient (__ to __) must not exceed __ “

A 
Green from 90-135
Yellow from 60-90
Red at 60 (upper limit of low pressure)
Red diamond at 40 (min press + low transient limit) and 200 (max pressure + transient)
Transient (135-200) must not exceed 20”
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11
Q

Oil Ops Limits:

  1. Ops < __ PSI is undesirable, may continue from __ to __ when TRQ is ___ PSI Max
  2. Ops < __ PSI is unsafe = land ASAP using min power
  3. Capacity is ____ US Quarts
A
  1. Ops < 90 PSI is undesirable, may continue from 60 to 90 PSI when TRQ is 23.9 PSI Max
  2. Ops < 60 PSI is unsafe = land ASAP using min power
  3. Capacity is 14.5 US Quarts
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12
Q

Red EIS (Engine Instrument System) = ?
Amber = ?
Self-Detected error displays as? Do What?

A

Red = NO GO
Amber = Go, but MX req’d
Self Detect = dashes. Shutdown, press test to get code.

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13
Q

Prohibited ground Np range is __ to __ RPM

A

Prohibited ground Np range is 350-950

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14
Q

Primary role of

  1. Condition Lever:
  2. PCL:
A
  1. CL: primary fuel flow, ground idle (64% Ng), Flight Idle (78-80% Ng), cut-off/feather
  2. PCL: sets power, sometimes prop pitch, ground, flight, reverse (beta)
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15
Q

Do not move the PCL aft of Idle when:
1.
2.
3.

A
  1. Engine not running
  2. In flight
  3. With MOR operation
    …else damage
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16
Q

MOR (Manual Over-Ride) Used to control engine power during __ failure of the _____ or ___ linkage failure.

  • PCL in ___
  • Move lever ___
  • = __ ITT
  • > /= __% Ng (>/+ __% Ng in descent)
  • Cond Lvr to __ at touchdown
A

Control pwr during pneumatic fail of Fuel Ctl Unit or PCL link fail

  • PCL must be in idle
  • Move lever slowly,
  • do not exceed 870 ITT
  • do not permit Ng to <65%,
  • In descent: set Ng >/= 75%;
  • Cond Lvr to Cutoff/Feather at touchdown
17
Q

Fuel Ctl Unit:

  1. Driven by ___ pump delivering at __ PSI
  2. Does:
A
  1. Hi-Press fuel pump at 800 PSI

2. Fuel schedule for desired power (PCL)

18
Q
  1. 3D Cam does ?
  2. Ng Governor does?
  3. Torque limiter?
  4. Np governor
A
  1. 3D Cam: pri for engine speed setting/control
  2. Ng Gov: controls Ng speed through 3D cam
  3. Q limiter works w/FCU to prevent exceeding 44.3 PSI
    4 Np governor works with FCU to prevent Prop/Pwr turbine over speed
19
Q

Pressure Relief Valve has 2 other valves:

  • ___ Valve, that …
  • ___ Valve, that …
A
  • Bypass valve, maintains constant pressure delta for more fuel than system can use. >1350 PSI
  • Min Flow Valve: stops at 90pph to prevent flameout
20
Q
  1. The fuel manifold has ___ manifold adapters to ___ the fuel for combustion
  2. Ignition: __ spark igniters use ___ VDC from the ___ Bus
    - Auto = on when ITT < __ and NG > __%
    - Auto = off ___ after ITT > ___
A
  1. The fuel manifold has 14 manifold adapters to atomize the fuel for combustion.
  2. Ignition: 2 spark igniters use 28 VDC from the Batt Bus
    - Auto = on when ITT < 500 and Ng > 10%
    - Auto = off 10” after ITT > 500
21
Q

When must I turn ignition on?
1.
2.
3.

A
  1. Heavy precipitation
  2. Turbulence
  3. Wind shear
22
Q

Oil:

  1. Max hot if w/in ___ min of shutdown
  2. Max cold >/= __ hours after shutdown and should not be used for Svc
  3. Scavenged oil goes through the ______
A
  1. Max hot w/in 10 minutes
  2. Max cold >/= 12 hours
  3. Scavenged oil goes through oil-to-fuel heat exchanger
23
Q

If dual battery, the starter Ng controller switches between Batt #1 and #2 when?
…and ____ tie held open to ______

A

Batt #1 start through 10% Ng or 10”
Batt #2 >10% or 10”
…and Gen 2 Bus tie held open to prevent overload

24
Q 
Prop:  Size
Pitch changes via \_\_\_\_\_\_\_ governor
Normal fwd thrust pitch at:  Idle, \_\_\_ “forward of Idle, then \_\_ to \_\_
Max Reverse
Feather
Ground Prop speed:
A 
Prop is 105”
Pitch changes via hydraulic oil governor
Idle:  6 degrees, 1/3” fwd = 12 degrees, then 12-19 degrees
Max Reverse: -17.5
Feather:  79.6
Ground Prop Speed:  ~1060
25
Q

Prop pitch angle defaults to ____ by springs. When placed in cutoff/feather, ___ is blocked = no __ for engine = restriction to put the anchors on the prop (to prevent free spinning)during ground ops

A

Prop pitch defaults to feathered (79.6 degrees) by springs. Placing to off/feather = OIL is blocked = no LUBE for engine

26
Q

Red Fire Detection via steel capillary tube filled with ____ and central ___ charged core that release above a certain temp (both localized and average). It is reversible.

Amber Fire Detection = detects ___ in the above system

A

Red Fire Detection via steel capillary tube filled with helium and central hydrogen charged core that release above a certain temp (both localized and average). It is reversible.

Amber Fire Detection = detects leak in the above system

27
Q

Fire:
Test is required before __ flight and ___ lights must illuminate.

1st step in fire = ___ shutoff to avoid ___ into the cabin

A

Test is required before every flight and all 4 lights must illuminate.

1st step in fire = ECS shutoff to avoid toxic gas ingestion into the cabin

28
Q

Fuel: 2 tanks per wing, __ and __
Total Capacity ___ gal
Usable ___ gal
Anti-Ice additive required for all flights in temps < __ degrees C

A

Fuel: 2 tanks per wing,main and collector
Total Capacity 406 gal
Usable 402 gal
A/I required <0 degrees C

29
Q
  1. Fuel goes from main to collector tanks via ___ with __ valves
  2. Vents maintain pressure between ___ to ___ PSI
  3. Transfer jet pump and delivery jet pump are operated by ____ (primarily by low-pressure ___)
A
  1. Fuel goes via gravity through flapper valves
  2. Vents maintain -0.2 to 2.0 PSI
  3. T’fer and delivery pumps operated by motive flow by low pressure Engine Driven Pump
30
Q

Boost Pumps:
__ VDC provide ___ GPH at __ PSI during engine __ and conditions of ___ fuel pressure (on at __ PSI, off at __ PSI)
- integral to ______

A

28 VDC provide 91.3 GPH at 31 PSI during engine start and conditions of low fuel pressure (on at 2.0 PSI, off at 3.48 PSI)
- Integral to auto balancing

31
Q
  1. MX S/O valve has a __ that protrudes, preventing ___ door from closing
  2. Fuel Filter has a bypass valve that opens at ___ PSI and will also extend to indicate to MX
  3. Air separator sends air from the FCU back to the ___
A
  1. MX S/O valve has a rod that prevents the fuel service bay door from closing
  2. Fuel filter bypass valve at 8 PSI
  3. Air separator returns air to the fuel tanks
32
Q

Low Pressure EDP provides ___ and fuel to the ___ EDP at ___ GPH and __ PSI.
- It is connected to the external ____ pump so if it fails, EDP fails

A

LP EDP provides motive flow and fuel to the High Pressure EDP at 207.9 GPH and 43.5 PSI
- Connected to external oil scavenge pump

33
Q

Oil-Fuel Heat exchanger:
Auto opens at:
Auto closes at:

A

Opens <21 degrees C

Closes >32 degrees C

34
Q

High Pressure EDP provides fuel at:
13% Ng = ___ PPH at ___ PSI
100% Ng = __ PPH at __ PSI

A

High Pressure EDP provides fuel at:
13% Ng = 210 PPH at 75 PSI
100% Ng = 1591 PPH at 800 PSI

35
Q

Low Fuel Warning illuminates when either main think indicates < ___ GAL

A

<20 Gal = low fuel warning

36
Q

Auto Fuel Balancing

  1. Condition lever must be ___
  2. __” delay to prevent rapid on/off cycling
  3. Auto on at __% of total Qty (~__ USG or __ LCD segments)
  4. The Heavy/Light Wing boost pump turns on
  5. Max imbalance is ___ LCD / __ USG / __ #
A
  1. CL must be forward of cutoff/feather
  2. 60” delay
  3. On at 5% (~10.5 USG or 2 LCD)
  4. Heavy wing boost pump on
  5. Max imbal: 3 LCD, 26.4 USG, 178#

PC-12 Legacy (4 decks)

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