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Flashcards in Board Prep Deck (103)
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1

APU in "arm" does what?

-Nosegear uplock bypassed to energize GOB
-APU load control valve disabled
-APU scissor switch relay bypassed to allow APU ops during emergencies

—IF switch in ARM—
-Ground AC and engine starting unavailable from APU

2

Generators produce: __v, ___phase, ___Hz

120, 3, 400

3

The brushless generator incorporates 3 sub generators, these are:

PMG, Exciter, Main Generator

4

Hyds pumps: Type, #, Output, Low Px, Temp High, Shutoff Temp

-Vickers variable displacement
-3
-8 gpm
-1800 PSI
-150*F
-380*F

5

Runaround Relays located where?
Purpose?
Power Source?

MLC - 7,4,3,6,2,5
Supply power to MEAC/FEAC
Do not require a power source, self rectifying.

6

GOB powered by ____ provides the GOB relay is deenergized. This relay can be deenergized 3 ways:

GOB has no backup power source

1. Place nosegear uplock switch in the “Not Up” position
2. Place APU arming switch to Arm
3. Pull GOB relay CB on FEDC

7

RAWS provides flashing red lights and an intermittent tone under the following conditions:

-3 sec warning @ 380 +/- 20
-Continuous warning @ 170 +/- 10
-Power interrupted to radalt @ any altitude
-Radalt becomes unreliable

8

Conditions for Autofx
Priority

1. System is armed
2. Less than 500# of thrust
3. Above 60* +/- 2 coordinator
4. No other engine has feathered

4,1,3,2

9

16% switch...

Opens the fuel SOV and energized the ignition relay
—IGN RELAY—
1. Energizes the igniters (cams 2 + 5)
2. Energizes paralleling valve solenoid
3. Energizes fuel manifold drain valve
4. If prime selected: energizes enrichment valve solenoid

10

Functions of the E-Handle

Shuts off Fuel @ FCU (E/M)
Closes Fuel tank emergency SOV (M)
Actuates FX system (E)
Moves Feather valve to FX (M)
Closes Bleed air SOV (E)
Closes Oil tank SOV (E)
Closes Gen cooling air SOV (M)
Dumps EDC & closes FWSOV (E)

11

Accessory Drive:

FCU
Engine driven pumps
Speed sense control
Speed sense valve
Main oil pump
Oil filter
Scavenge pump

12

RGB:

Starter
Tach gen
Oil pump/filter( 1 main, 2 scavenge)
Generator
EDC

13

Usable engine oil tank capacity:
Foaming Space:
Tank volume capacity:
Unusable oil:
Tank px to:
Drain down:

-8.65 gal
-5.7 gal
-15.75 gal
-1.4 gal
-4.5 psi above ambient
-Oil draining into RGB/Pwr section. Requires motor over to pump the oil back to the tank

14

Engine brief:

-T56-A-14, single spool axial flow has turbine engine connected to RGB @13,820 rpm nominally.
-14 stage axial flow compressor convergent in design, divergent in operation 9.64:1 ratio.
-5th & 10th Open to relieve px during starts
-25% of Air for combustion, 75% for cooling and flame control

15

LGWS actuation speeds, sound, cancellable?

-<153 +/- 3 AND PL < 48* coord
— cancellable
-<142 +/- 3 AND PL < 60* coord
—cannot be canceled
-Flaps Land
—cannot be cancelled

16

Prop protective devices

2BA2PLAND
Beta Follow Up
Prop Brake
Auto Feather
Pitch lock
Pitch lock reset
Low pitch stops
45° Air Start
NTS
Decoupler

17

Prop Brake

Friction Type Cone
Applied, locked, released
>21% rpm and >50psi in RGB
Prevents backwards spinning and windmilling
Made of Brass

NO FLUID REQUIRED
NO ELECTRICITY REQUIRED

18

Beta Follow up

Stops loss of pitch caused by gradual power loss and high power settings. It’s a secondary variable low pitch stop, designed to maintain a min. blade angle based on coordinator setting.
34-68° coord = 11° blade angle

Linear increase from 68°-88°
88°+ coord = 22.5° blade angle

Reverse SHP, Fuel Gov Checks also verify this is working by checking for a min of 1500 SHP as you bring back PLs

FLUID REQUIRED
NO ELECTRICITY REQUIRED

19

Auto Feather

*EMDC*
Used during T/O to autofx a malfunctioning engine.
-Power Lever > 60° coord
-No other engine feathered
-Autofx system armed
-<500# thrusts
Feathers based on P-factor effect, 4-1-3-2 low to high effect.

FLUID REQUIRED
ELECTRICITY REQUIRED

20

Pitchlock

Limits prop over speed by preventing a decrease blade angle following an over speed or loss of fluid px.
-Cammed out below 17° to allow reverse
-Cammed out above 57° coord to allow FX
Over speed of 103.5% unseats the valve allowing teeth to touch.

NO FLUID REQUIRED
NO ELECTRICITY REQUIRED

21

DVFR

Defense Visual Flight Rules

“Refers to the type of flight plan that will be operating VFR in and around ADIZ or restricted air space (such as an oil platform with ADIZ boundary)

On flight plan instead of “I/V” file as “D”

*Operating Due Regard w/in ADIZ wont be within tolerances.

22

Symptoms of a pitchlocked prop

1. RPM follows Power Lever movement.
2. RPM stabilized at fuel topping gov 104.2-106.7%
3. ASR (+-+)
4. T/O = Power loss, over speed
5. Landing = No Beta light, high SHP, Swerve.

23

Pitchlock Reset

*FEDC*

Used to reset pitchlock to 109% whenever blade angle is >10° and coord is <28° such as an aborted takeoff. De-energized when blade angle < 10°

FLUID REQUIRED
ELECTRICAL POWER REQUIRED

24

Horizontal Wx Depiction

Natops 7-2: “All overwater flights SHALL request HWD”

-Forecasted altimeter settings and min altimeter settings on station
-Ditch Headings
-Winds aloft
-Can request from FWB

25

Low Pitch Stops

Mechanically limits the blade angle to 13°.
It is released by full decrease px. Backup valve opens when power levers < 28° coord allowing the Main And Standby Regulating Valve to sense the demand for elevated px in the decrease pitch lines to break the Low Pitch Stops. Successful release of LPS indicated by a BETA light @ 10° blade angle.

NO FLUID REQUIRED

26

Runway Environment In Sight

-Approach Lighting System
-Threshold Lights
-Threshold Markings
-Runway Lights
-Runway Markings
-VASI
-Touch Down Zone Lighting
-Touch Down Zone Markings
-REIL

27

45° Airstart

Backs up NTS during an airstart by maintaining Blade Angle above 45°.

Conditions:
- Fx Button Unfeathered
- PCO not depressed
- Blade Angle < 45°

System operation energizes Airstart control relay, illuminates NTS INOP, and energizes FX valve solenoid causing FX valve to go to FX.

FLUID REQUIRED
ELECTRICAL POWER REQUIRED

28

Decision Speed

Minimum engine failure speed from which a safe takeoff can still be completed within runway length remaining.

29

Refusal Speed

The maximum airspeed from which the air craft can abort a takeoff and stop within runway length remaining.

30

Rotate Speed

Airspeed at which the transition from ground run attitude to climb out attitude has begun.