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SYS105

  1. Hot start
    • High/rapidly rising ITT
    • Lower N1
    • Lower Np
  2. Hung start
    • Lower N1
    • Lower Np
  3. No start
    • No ITT
    • Lower N1
    • No Np 
    • No torque
  4. Given indications of abnormal start, what should you do?
    Begin abort start procedure
  5. What are the types of abnormal start?
    Hot; Hung; No start
  6. Indications of engine failure
    • Loss of power and airspeed
    • rapid decay of N1, torque and ITT
    • MASTER WARN
    • Prop moves to feather
  7. PMU failure
    • power step change
    • PMU FAIL/ PMU STATUS
    • MASTER WARN
    • aural tone
  8. Uncommanded power changes/loss of power
    • reduction in power/thrust
    • lower than expected fuel flow
    • uncommanded decrease it N1
    • High RITT on AEDD
  9. Uncommanded feather
    • Rapid loss of power
    • high torque
    • lower Np
    • possible PMU FAIL/STATUS
    • engine vibration
    • engine noise
  10. Prop sleeve touchdown
    • Np fluctuations
    • increasing torque
    • decreasing thrust
    • engine vibrations
    • possible CHIP light
  11. FEVER
    • F-fluctuating oil PX/temp, Hydraulic PX
    • E-excessive turbin temp
    • V-visual indications; smoke flames
    • E-erratic engine operations
    • R-roughtness or vibration
  12. What are the three engine sections?
    • Accessory compartment
    • Gas generating section
    • Power turbine section
  13. What functions are performed by the PMU?
    • Maintain operating limits
    • Process power request
    • Control engine and propeller
    • Provide near linear power resonse
  14. What is the purpose of the PIU?
    Regulate oil pressure to the pitch change mechanism
  15. What are some possible causes of engine failure in-flight?
    • Fuel starvation
    • Mechanical failure
    • Compressor stall
  16. what are some possible causes of uncommanded power loss?
    • Engine rollback due to PMU scheduling
    • oil/engine/fuel system contamination
  17. Three engine sections are ____
    • Accessory compartment
    • Gas generation section
    • power turbine section
  18. Ignition system components are____
    • Exciter box - receives low voltage, sends out high voltage signal
    • Igniter cables - 2 high voltage
    • Igniters - 4 & 9 positions
  19. Propeller pitch change mechanism components:
    • Fixed cylinder
    • sliding piston
    • feathering spring
    • fork assembly
    • cam follower
  20. The power turbine is driven by _____
    expanding gases
Author
Anonymous
ID
245247
Card Set
SYS105
Description
SYS105
Updated

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