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Aircrew > Ground Phase > Flashcards

Ground Phase Flashcards

1
Q

Engine oil, substitute, and capacity

A
  • Mobil Jet 254
  • MIL-L-23699
  • 7.3 quart capacity
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2
Q

APU (Auxiliary Power Unit) oil, substitute, and capacity

A
  • Mobil Jet 254

- 3 quart capacity

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3
Q

Engine starter oil and substitute

A
  • Mobil Jet 254

- MIL-L-23699

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4
Q

MGB, IGB, TGB fluid and capacity

A
  • Fluid DOD-L-85734
  • MGB 7.5 Gallons
  • IGB 2.75 Pints
  • TGB 2.75 Pints
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5
Q

Hydraulic Fluid

A

MIL-H-83282

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6
Q

Viscous Damper Fluid

A

VV-D-1078

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7
Q

Checking APU

A
  • Check one hour after shutdown
  • Oil level between add line and a point 1/8” above add line
  • Accumulator pressure 2700-3000 PSI
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8
Q

Checking Engines

A
  • Check 20 minutes after shutdown

- If oil less than 1/2 way between full and add line, service to approximately 1 inch below full line (top set of bolts)

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9
Q

Checking Engine Starter

A
  • No time requirement after shutdown

- Oil level should be to flat machined surface inside fill port at 6 o’clock position

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10
Q

Checking MGB

A
  • If possible, let sit at least 6 hours or overnight without turning rotor
  • Hot side 1/2 to 2 hours after shutdown
  • Cold side more than 2 hours after shutdown
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11
Q

Checking IGB

A
  • Do not check with pylon folded
  • Is properly serviced when oil level is within inner circle when pylon is spread
  • If needs more than 300ml to bring Oil level to top of inner circle, gearbox should be replaced
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12
Q

Checking TGB

A
  • Do not check with pylon folded
  • Is properly serviced when oil level is within inner circle when pylon is spread
  • If needs more than 400ml to bring oil level to top of inner circle, gearbox shall be changed
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13
Q

Checking Viscous Dampers

A

-100 Centistokes dampening Fluid (VV-D-1078)

Air Bubbles:

  • 0 to 1 inch damper may continue in service
  • 1 to 2 inches should be serviced
  • More than 2 inches damper should be replaced
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14
Q

Checking Rescue Hoist

A
  • Check oil level is within sight glass

- View sight glass through rear screen fan

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15
Q

Checking ECS (Environmental Control System)

A

-Oil level should be visible in sight gauge

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16
Q

Hydraulic Pumps

A
  • Operate at 3000 PSI with 6GPM flow
  • Capacity 0.84 quarts, low light on at 0.52 quarts (60%)
  • Check reservoirs stay full (forward end of piston at forward end of green decal) with Fluid at outside air temperature 1 hour after flight
  • When beyond limits, bleed enough fluid to bring piston back to 3/8” above full level
17
Q

Hydraulic Hand Pump Reservoir

A
  • Capacity 1.3 quarts, 0.3 quarts when fluid is in sight line glass
  • When servicing, ensure hydraulic fluid can be seen in sight gauge to prevent air from being pumped into the system

Selector Valve:

  • 1: #1 pump module
  • 2: #2 pump module
  • 3: Backup pump and APU accumulator
  • 4: Rotor brake, valve is stowed in this position
18
Q

Primary and Secondary Fuels

A

Primary

  • JP4 (F40)
  • JP5 (F44)
  • Jet A (no NATO code)
  • JP8 (F34)
  • Jet A/M (F24)

Secondary

  • Jet A1 (F35)
  • Jet B
19
Q

Fueling Limitations

A
  • Max pressure from servicing unit 55PSI
  • Stop refueling if main tank pressure gauge reaches 2 PSI
  • Pre checks: check one at a time, fuel should slow significantly or stop in 5 to 10 seconds. If either fails, stop fueling immediately
  • Minimum of 50 ft from other aircraft or structures, 300 ft from any operating ground or aircraft radar set
20
Q

Fuel Additives

A
  • Fuel system icing inhibitor MIL-L-27686 (PRIST) (.07-.15% by volume)
  • Required fuel additive for all CG aircraft
  • Shall be added using accepted commercial mixing procedures
21
Q

Fuel Tank Capacities

A
  • Mains: 590 Gallons
  • Both Left Aux: 240 Gallons
  • Right Aux: 80 Gallons
  • Total 910 Gallons
22
Q

Tires (PSI/Limits)

A

Mains

  • 95 to 100 PSI
  • Tread cut limit IAW limit printed on tire wall
  • No bald spots that expose fabric ply or that exceed continuous length of 12”

Tail

  • 78 to 83 PSI
  • Tread cut limit IAW limit printed on tire wall
  • Check for tire slippage
23
Q

Rotor Brake

A
  • Minimum pressure 450 PSI

- Brake wear indicator pin: If 1/4” diameter portion of pin is less than 3/16” from housing, replace brake pads

24
Q

Rotor Blades

A
  • BIM indicator shows black when an unsafe condition exists
  • Minimum blade deflection is 12” from static position
  • Blade tie downs should be used when helicopter will be parked for period of time or when actual or projected wind conditions are 45 knots and above
25
Q

Towing

A
  • Max towing speed 5mph
  • Aircraft should not be towed within 5ft of obstacle
  • Wing walkers required if towing within 25ft of an obstacle
26
Q

Fueling Fill Sequence

A
  • Auto full sequence: Both main tanks, LO, LI, RI (Requires AC power)
  • All tanks fill equally without AC power

Aircrew (4 decks)

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