RR TRENT 900 REVIEWER
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Questions and Answers

The P20/T20 probe is installed inside the air intake cowl. The probe measures both engine intake pressure and temperature. Where in the air intake cowl does the P20/T20 installed?

  • 6 o' clock
  • 1 o' clock (correct)
  • 3 o' clock
  • 12 o' clock

    • An electrical de-icing heater element is configured around the P20/T20 probe powered by Aircraft 115V supply. The EEC selects probe heat on and off dependent upon the following?

  • Probe Heat selected ON if: Aircraft is in flight and N1>10% Or Aircraft is on ground and engine is producing thrust with N3>45% and N1>10% Probe Heat is selected OFF if: Aircraft is in flight and engine is not producing thrust, with N1 < 10% Aircraft is on ground and engine is not producing thrust, with N3<45% or N1<10%. (correct)
  • Probe Heat selected OFF if: Aircraft is in flight and N1>10% Or Aircraft is on ground and engine is producing thrust with N3>45% and N1>10% Probe Heat is selected ON if: Aircraft is in flight and engine is not producing thrust, with N1 < 10% Aircraft is on ground and engine is not producing thrust, with N3<45% or N1<10%.
  • Probe Heat is selected ON whenever aircraft is powered ON and Probe Heat is selected OFF whenever aircraft is powered OFF
  • Probe Heat is selected ON whenever aircraft is powered ON and in flight and Probe Heat is selected OFF 60 secs whenever aircraft is on ground.

    • Fan cowls and fan exhaust cowls are electrically operated. When opened, they are held in position by hold open rods. How many Hold Open Rod are there per cowl?

  • 1 HOR
  • 4 HOR
  • 3 HOR
  • 2 HOR (correct)

    • The drained fluids exit via a drain mast that is mounted on the rear face of the external gearbox at the split line between the two fan cowl doors.
    How can we identify a leaking component is easily on the drain mast?

    <p>The name of the corresponding drained component is engraved beside its outlet.</p> Signup and view all the answers

    What happens to the fuel leaks and unburnt fuel from fuel manifold?

    <p>Fuels are drained from manifold via the HMU to the drain tank. The contents of the drain tank are drawn back into the main fuel system during subsequent engine running, an overflow pipe is provided to drain excess fuel overboard, once the drain tank is full.</p> Signup and view all the answers

    Compressor-Turbine Stages in a triple spool Trent 900 Engine

    <p>The LP rotor has a single stage LP compressor driven by a 5-stage LP turbine.</p> <p>The IP rotor has an 8-stage compressor driven by a single stage turbine.</p> <p>The IP rotor has a 6-stage compressor driven by a single stage turbine.</p> Signup and view all the answers

    What are the direction of rotation of the three spools when viewed from rear?

    <p>LP (N1) and IP (N2) turns in counterclockwise direction and HP (N3) turns in clockwise direction.</p> Signup and view all the answers

    Where is the oil tank servicing panel located?

    <p>RIGHT FAN COWL</p> Signup and view all the answers

    Which nacelle has a strakes for better air flow?

    <p>INBOARD FAN COWLS</p> Signup and view all the answers

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