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H145 > Powerplant > Flashcards

Powerplant Flashcards

1
Q

Name the 5 Powerplant Modules

A

Accessory Gearbox/Transmission

Axial Compressor

Gas Generator High Pressure Section

Power Turbine

Reduction Gearbox

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2
Q

What does the Accessory Gearbox drive?

A

Starter/Generator Pump

Oil Pump

Fuel Management System (including 2 Fuel Pumps)

Alternator (to power the FADEC)

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3
Q

What is the power supply for the EECUs during engine start, below 61% N1 or in the event of an Alternator failure in flight?

A

Essential Bus 1/2 through FADEC 1/2 CBs

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4
Q

What is the normal supply for the EECUs? (above 61% N1)

A

Engine Alternators

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5
Q

What are the main Engine Control Parameters?

A

N1, N2 and T4,5 (TOT)

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6
Q

Above what temperature does the Engine shut down during start?

A

840 deg C

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7
Q

Is it possible to start both engines simultaneously?

A

No

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8
Q

Is it possible to start the engine with the rotor brake engaged?

A

No

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9
Q

What is the engine matching parameter at low power?

A

N1 (lowest matches to the other engine)

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10
Q

What is the engine matching parameter at intermediate power?

A

Tq

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11
Q

What is the engine matching parameter at high power?

A

Lowest FLI margin

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12
Q

How is an OEI detected

A

Difference of 6% N1 or more
Difference of 53% Tq or more

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13
Q

When and how does the EECU shut down an engine due to overspeed?

A

Both N2 speed sensors indicate N2 120%

By closing the Stop Electro Valve

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14
Q

Can you restart an engine after an overspeed protection shutdown?

A

No

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15
Q

Max operating engine time (flight or idle)

A

12 hours

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16
Q

AEO N1 Limits

A

98,5% Maximum Continuous
100,6% Take-Off power max 30min max Vy + 10kts
101,7% Maximum Transient max 20s

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17
Q

OEI N1 Limits

A

101,7 Maximum Continuous
104,3 2min limit
105,7 30min limit

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18
Q

N2 Limits

A

Min 94%
Max 108,3%

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19
Q

Rotor Brake Nr Limit

A

0-50% Nr (Power off)

20
Q

Warning Unit Rotor RPM

A

Less than Nr Min
More than 109%

21
Q

Power Off Nr Limits

A

Min 80% (less than 2200KG)
Min 85% (more than 2200KG)

Max 109-113 max 12s (mutable)
Max 113 (not mutable)

22
Q

Power On Nr Limits

A

Transient NRmin-85% max 20s
107,5%-109% max 12s

23
Q

TOT start limitations

A

760 deg Maximum Continuous
840 deg max 10s

24
Q

AEO TOT limitations

A

0-901 deg Normal Operating Range
918 deg Take Off Power max 30min, max Vy +10kts
945 deg Maximum Tranisent max 20s

25
Q

OEI TOT limitations

A

0-945 deg Normal Operating Range
987 deg 2min
1006 deg 30s

26
Q

AEO Tq limitation

A

74% Maximum Continuous
79% Transient above Vy+10 kts max 12s
95% Takeoff Power max 30 min, max Vy+10 kts
104,5% Transient max 12 s, max Vy+10 kts

27
Q

OEI Tq limitations

A

100% Maximum Continuous
143% 2 min
150% 30 s

28
Q

AEO FLI limitations

Red teardrop
Red line
Amber Rectangle
Blue Line
White Dashed

A

Red teardrop: unintended, max 12 (requires maintenance action)
Red line: Takeoff Power
Amber Rectangle: max 30 min, max Vy+10 kts, (white counter displayed 90 s prior to rating expiring)
Blue Line: OEI power limit
White Dashed: Below this Nr may increase

29
Q

OEI FLI limitations

Upper Red Line
Lower Red Line
Amber Line
Red Hatched Rectangle
Amber Hatched Rectangle

A

Upper Red Line: 30 s
Lower Red Line: 2 min
Amber Line: Max Continuous
Red Hatched Rectangle: If power more than 2 min lim
Amber Hatched Rectangle: If power more than Max Continuous lim

30
Q

What are the limiting parameters for FLI

A

Tq, TOT, N1

31
Q

Engine Oil limitations

A

0-115 deg Normal operation
117 deg max
0 deg before power application

32
Q

Dual Engine Failure HIGE procedure

A
  1. Right Pedal… …Apply as necessary to stop yaw
  2. Landing Attitude… …Establish
  3. Collective lever… …Raise to cushion landing
33
Q

Dual Engine Failure in flight procedure

A
  1. Autorotation… …Perform
34
Q

Single Engine Failure HIGE procedure

A
  1. Landing Attitude… …Establish
  2. Collective Lever… …Raise to cushion landing

After landing
3. Double Engine Emergency Shutdown… …Perform

35
Q

Single Engine Failure HOGE procedure more than 100’ AGL Procedure

A
  1. Attitude… …adjust to -15 - -25 deg nose down
  2. Collective Lever… …adjust to maintain Nr in normal range. Set to OEI 30s limit or as required
  3. Landing Attitude… …Establish
  4. Collective Lever… …Raise to cushion landing

After landing
5. Double Engine Emergency Shutdown… …Perform

36
Q

Single Engine Failure HOGE procedure less than 100’ AGL

A
  1. Attitude… …adjust to -5 deg nose down
  2. Collective Lever… …adjust to maintain Nr in normal range. Set to OEI 30s limit or as required
  3. Landing Attitude… …Establish
  4. Collective Lever… …Raise to cushion landing

After landing
5. Double Engine Emergency Shutdown… …Perform

37
Q

Single Engine Failure HOGE Transition to OEI Flight Procedure

A
  1. Attitude… …adjust to -15 - -25 deg nose down
  2. Collective Lever… …adjust to maintain Nr in normal range. Set to OEI 30s limit or as required
  3. Airspeed… …Accelerate to Vy, reduce power to EOI 2 min limit, latest when red OEI counter flashes

After reaching safe altitude:
4. Collective lever… …Reduce to OEI MCP or below
5. Affected engine… …Identify
6. Single engine emergency shutdown… …Perform
7. Land as soon as practicable

38
Q

Single Engine Failure During Take-Off (Rejected) Procedure

A
  1. Collective Lever… …Adjust to maintain NR in normal range
  2. Landing Attitude… …Establish
  3. Collective Lever… …Raise to cushion landing

After landing
4. Double Engine Emergency Shutdown… …Perform

39
Q

Engine Failure During Take-Off (Transition to OEI Flight) Procedure

A
  1. Collective Lever… …Adjust to maintain NR in normal range
  2. Collective Lever… …adjust to OEI 30s limit or below
  3. Airspeed… …Gain Vy, reduce power to EOI 2 min limit, latest when red OEI counter flashes

After reaching safe altitude:
4. Collective lever… …Reduce to OEI MCP or below
5. Affected engine… …Identify
6. Single engine emergency shutdown… …Perform
7. Land as soon as practicable

40
Q

Single Engine Failure in Flight Procedure

A
  1. OEI flight condition… …Establish
  2. Affected engine… …Identify
  3. Single engine emergency shutdown… …perform
  4. Land as soon as practicable
41
Q

Engine Fire on Ground Procedure

A
  1. Fire sw (affected engine)… …Raise guard, press
  2. Both fuel prime pump sw’s… …Check off
  3. BOT1/BOT2 bp… …Press bottle 1
  4. Clock stop watch… …Start after BOT1 and EXT light extinguish
  5. Both ENG main sw’s… …Off
  6. Passengers… …Alert/Evacuate

If situation permits and FIRE waring is still on after 1 min
7. BOT1/BOT2 pb… …press
8. BAT MSTR sw… …Off

42
Q

Engine Fire During Flight Procedure

A
  1. OEI flight condition… …Establish
  2. Fire sw (affected engine).. …Raise guard, press
  3. BOT1/BOT2 bp… …Press bottle 1
  4. Clock stop watch… …Start after BOT1 and EXT light extinguish
  5. VMS page… …Select
  6. Affected engine… …Identify
  7. Single engine emergency shutdown… …perform
  8. Passengers… …Alert

If FIRE warning disappears
9. Land as soon as possible

If FIRE warning is still on after 1 min

If situation permits and FIRE waring is still on after 1 min
9. BOT1/BOT2 pb… …press

If fire warning remains on
10. Land immediately

43
Q

Double Engine Emergency Shutdown (on ground)

A
  1. Both Eng Main Sw… …Off
  2. Fuel Prime Pumps… …Off

If there is an indication the engines are still running…
3. Both EMERG OFF sw… …Press
4. BATT masters sw… …Off

44
Q

Double Engine Emergency Shutdown (in flight)

A
  1. IAS… …set to Vy
  2. Autorotation… …establish
  3. Both Eng Main Sw… …Off

If there is an indication the engines are still running…
4. Both EMERG OFF sw… …Press

45
Q

Autorotation Speeds

Max Range
Min ROD

A

Max Range 90 kts
Min ROD 60 kts

46
Q

Autorotation Procedure

A
  1. Collective lever… …reduce to maintain Nr
  2. Airspeed… …Vy
  3. EMERG SHD BUS sw… …lift guard, ON
  4. Double Engine Emergency Shutdown… …Perform

At Approx 100ft
5. Flare attitude… …Establish approx 15-20 degrees

At Approx 8-12ft
6. Flare attitude… …Reduce to approx 10 degrees
7. Heading… …Maintain
8. Collective lever… …Raise to cushion landing
9. BAT MSTR sw… …OFF

H145 (7 decks)

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