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Key lime Ops > Systems > Flashcards

Systems Flashcards

1
Q

What engines are on the metro?

A

Garrett turboprop

  1. -10 engines 840hp
    227AC. -11 1000hp dry. 1100hp wet

227BC
227DC. -12 engines. 1100hp takeoff
1000hp max continuous

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2
Q

What is max fuel?

A

4342 lbs

648 gallons of Jet

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3
Q

What is the service ceiling differences between metros?

A
  1. FL250
    227ac,bc. FL310
    227DC. FL250
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4
Q

What are the wingspan differences?

A
  1. 47’

227’s. 57’

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5
Q

What is forward baggage weight capacity?

A

Placard on door will dictate the weight capacity.

Normally 800lbs -minus the installed equipment aft of bulkhead

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6
Q

What is CAWI and how much is used on each of the planes?

A

CAWI - continuous alcohol/water injection

Used to add temporary performance by increasing compression ratio of the engines when injected to help assist on takeoff during certain airport of aircraft conditions.

Metro 23 227DC. 16 gal capacity with 14 usable
Located in 2 inboard tanks

Other birds 16 gal capacity and usable same
Tank located in bladder inside nose

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7
Q

What is the limitation on how long CAWI can be used?

A

5’ takeoff limitation

Burns 2.4 gallons per minute per engine

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8
Q

What all is located in the tail section?

A
  • Avionics Rack
  • oxygen
  • pneumatic relay
  • outflow valve
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9
Q

Explain the main cabin door, operation and it’s limitations?

A

Main cabin doors is an integral part of the airframe.

  • Consists of 7 bayonets and 2 alignment pins
    (Rod pushes out and pushes latches)
  • gas struts (compressed air)
    (Operator must support door while opening)

(Older birds than 650 SN#, 7 click-clacks and 2 pins)

  • Never tow aircraft with door open as it can permanently damage airframe as well as door
  • make sure bayonets are retracted before shutting door or damage
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10
Q

What is the pressure diaphragm lock?

A

A pressure actuated diaphragm lock that uses:

  • an inflatable rubber seal below
    Moves mechanically to hold door locked when pressurized in flight
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11
Q

Cargo door consists of:

A
  • 8 click-clacks

- 2 alignment pins

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12
Q

How many emergency exits? Explain

A

2 on either side of cabin

Main cabin door is considered one of the 2 on left side

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13
Q

Cargo door test light switch… Explain how it works..

A

Unlock cargo door then perform test.

Rocket switch-

  • lamp test
  • switch tests micro switches
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14
Q

Emerg exit signs

A

Sign lights up with Hazmat Tritium material

2 signs on left and 2 on right

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15
Q

Windshields

Explain

A

5 windows upfront

  • 2 double pane electric heat
  • 3 stretched acrylic
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16
Q

Explain electrical battery system

A

2 AC batteries
(located onboard engine pylons)
24 v lead acid (must have at least 24v to start)

2 starter generators (DC 28v)
Started generates power when up to speed

2 static inverters convert DC to AC 115 26V

GPU plug
(Located on Wing root Metro 23, #1 engine nacelle others)

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17
Q

Explain 9 electrical essentials

A

IFPIG

Instrument pilots DC
Fuel Crossflow valve
Pressurization Dump
Ice Equipment
     - surface deice boots
     - left/right Engine Intake Heat
     - L windshield Heat 
Gear
    - landing gear control
    - landing position indicator

Significance:

9 essentials are on pilot side console and in the event of issue can be moved over to right side

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18
Q

Fuel system

A

Fuel Jet A stored in integral wing tanks

  • A crossflow valve connects each wing tank (Elect power by essential bus)
  • 2 Aux Boost pumps
    (powered by opposite essential bus)
    Magnasticks - backup fuel quantity indicator system
    From 200-1000 lbs
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19
Q

Prop

A
  • Controlled with counter-weight spring force
  • Oil feathers blades

High and Low positions not condition levers

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20
Q

Engine gauges

A
  • EGT max 650 normal operations
  • Torque. 0-100%
  • RPM
  • Fuel Flow
  • Oil Temp
21
Q

Fire suppression system

A

Metro 2 - detection only

All other Metros- Detection and Suppression Extinguishers

22
Q

Pneumatic system

A

Runs off of engines

Operates: AC
pressurization system
18/21 pneumatic system

-uses regulated and un-regulated bleed air and vacuum.

Either engine is sufficient to meet all requirements, but both are normally used.

Regulated bleed air is used for:

  • pressurization
  • air-conditioning
  • deice boot inflation
  • window defogging
  • hydraulic reservoir pressure
  • door seal inflation
  • vacuum generation.

Unregulated bleed air is used for engine and nacelle inlet anti-icing.

23
Q

De-Ice System

A

Boots
Wing and Horizontal Stab
18psi to open
Closed by vacuum

Engine Inlets - Bleed Air
Props- Electric heated strips

24
Q

Pressurization system

A

7 psi Normal Pressure
Holds sea level pressure to 16,800’

2 safety relief valves - limit cabin pressure to 7.25 if pressurization controller fail

outflow valve controlled by PIC - back of plane bulkhead
At 7.31 backup outflow valve opens

Gauges

Press controller - asks system what to do
Cabin press selector-
Cabin rate - vsi

25
Q

Hydraulic system

A

2000psi normally
Pump on each engine -
-rate of 5 gallons per minute

Connected by common manifold
Fail of 1 pump other pump can keep things running

Operates:

  • steering nose wheel
  • flaps
  • gear

Hydraulic hand pump draws reserve fluid from tank reservoir

1 quart reserved by standpipes

26
Q

Landing Gear

A

Electrically controlled
Hydraulically driven

  • emergency extension handle
27
Q

Geardoors

A

Metro 226. - main gear doors stay open after extension

All others- Gear doors shut after extension

28
Q

Brakes

A

Shuttle valve transfer braking function to either PIC or SIC

Manual brakes without anti skid
Activated by toe brake pedals

Hydraulic fluid contained in brake system hydraulic reservoir independently

Parking brake - Do not use!
If on slope can set temporarily to chock plane then set off

29
Q

Flight controls

A

All cables mechanically cable driven on all except Stabilizer trim

30
Q

What’s in the J box?

A
  • battery bus
  • current limiter
  • 150 amp nonessential
  • 1 amp bus voltmeter circuit breaker
  • 1 amp GPU voltmeter circuit breaker
31
Q

Backup AC bus lights

A

trimeter (115 ac bus)

  • Prop Deice
  • AC bus
  • pitot heat
32
Q

26 AC bus

A

Nav 1
RMI
ADF

If flag on it failed.

*THERE IS NO WAY TO MONITOR THE HEALTH OF 26 VAC busses

33
Q

Starter limitations

A

1st attempt. Start 30seconds.
Wait. 60 off

2nd attempt. Start 30 seconds
Wait 60 off

3rd attempt start 30 seconds
WAIT 15 MINUTES OFF

34
Q

Starter generator limitations

A

Maximum cont. load 300 amps

  • 1 is specific To SN#
35
Q

Lighting

A

All lighting powered from Non-Essential Bus

Exception - entrance light - no timer! off L Batt
Cargo baggage light - 5 min timer

                  *reset timer in left baggage in nose
                  Or recycle R Battery switch
36
Q

What is procedure for turning off taxi light

A

Landing gear up - taxi light on

37
Q

Landing /Recog light

A

Landing - 250 watts *Avoid prolonged use

Recog - 100 watt

38
Q

Fuel Annunciator

R/L XFER

A

Comes on when hopper tank has less than 75 pounds

39
Q

Fuel pressure

A
  • will Yelp you if Jet XFER pumps are working

Boost pumps - put out 15-20 psi
Engines running - 50 psi

40
Q

Boost pumps In-Op

A

XFER Pump caution light illuminates
- around 600-700 lbs l

  • something wrong with Jet pumps or boost pumps
  • takeoff with TXFER PUMP annunciator PROHIBITED!
41
Q

Disagreement Lights

A

If valves do not agree with switch

- this light will Illuminate

42
Q

Fuel pressure test switch

A

Initially indication go 12 o’clock

Then settle to actual value

43
Q

Magnastick

A

Magnet on Float and on stick which slows fuel indicated

  • max fuel that can be read 1000lbs per wing
44
Q

Fuel Pressure gauge

A

How you determine system working

45
Q

Fuel flow

A

Measures calibrated flow pound per hour

Impeller in a tube measures flow

46
Q

Fuel consumer

A

Shows total amount of fuel consumed since counter zeroed

47
Q

Explain the engine power section

A

Power sections Consists of

  • 2 stage Centrifugal Compressor
  • angular reverse flow combustion chamber
  • 3 stage axial- flow turbine
48
Q

SRL 5 failures

A

Below 80 % SLR off normally
(Not working) light should be illuminated

Above 80% SLR on normally Light distinguished

20 degree EGT dropped

Erratic EGT

Stupid - we turned it off

Key lime Ops (16 decks)

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