iae selectone engine differences

V2500 SelectOneTM

• Identify and describe the differences of the A5 and SelectOneTM engines.

• Explain the servicing activities related to the SelectOneTM engine.

Section ObjectivesAt the end of this section, the operator will be able to:

SelectOneTM

The upgrade package aims to give:

Up to 1% Improvement in SFC.

Up to 20% Time on wing Increase.

How do you identify the SelectOneTM ?

MODEL: V2500-A5

SERIAL NO:V15001

IAN NO:Installation Arrangement

NumberSQ02(Goodrich FMU)

SQ03(Woodward FMU)

MODEL: V2500-A5

SERIAL NO:V15001

IAN NO:Installation Arrangement

NumberSQ02(Goodrich FMU)

SQ03(Woodward FMU)

How do you identify the SelectOneTM ?

SelectOneTM

New EEC software High Pressure Compressor-HPC

High Pressure Turbine-HPT

Low Pressure Turbine-LPT

New EEC software High Pressure Compressor-HPC

High Pressure Turbine-HPT

Low Pressure Turbine-LPT

SelectOneTM

Electronic Engine Controller

SelectOneTM EEC requires SCN20 as minimum standard.SCN20 & 20A intermixable with SCN19 and above.Data Entry Plug

wired for A5/ SelectOneTM

•HPC accommodation.

•Eliminates EPR Fluctuations.

•Improve transient detection logic.

•Improve Altitude Deceleration Stability.

•Improve Fuel Consumption at Cruise.

•Enhance quick relight.

Initial Engines operating with SCN20 software, thereafter SCN20A software.

EEC - SCN20

• HPC accommodation: Introduces a dedicated variable stator vane (VSV) schedule for SelectOneTM.

• Eliminates EPR Fluctuations: Avoids EPR fluctuations by hysterisis bandwidth revision of 7C bleed cycling.

• Improve transient detection logic: Enhance robustness of transient detection logic by the introduction of a new architecture.

• Improve Altitude Deceleration Stability: Increase compressor stability margin by raising the Engine 7C handling bleed valve trip speeds at altitude.

• Improve Fuel Consumption at Cruise: Reduce the Engine 7A bleed steady state trip speeds for high altitude.

• Enhanced quick relight: Provide the capability to derate the fuel scheduling during quick relight.

EEC - SCN20

• Software enhancement to modify the 7C bleed schedule only on the ground during Take-off role.

• Software clearance and subsequent upload scheduled for year end.

• Modifies Engine Acceleration schedule.

EEC - SCN20A

High Pressure Compressor

• Temperature reduction at HPC delivery - T3; improving emissions and turbine entry - T4.

• Giving better EGT Margin.

• Which will lead to increased time on wing.

HPCElliptical leading edge and improved surface finish-stators & rotors.

New Variable Stator Vane (VSV) system.

Damper wire deletion Rotors 6-8.

Locking blade redesign.

HPCElliptical leading edge and improved surface finish-stators & rotors. Locking

blade redesign.

New Variable Stator Vane (VSV) system.

Damper wire deletion Rotors 6-8.

HP Turbine

Improved efficiency and reduced fuel burn by:

• Reduced HPT cooling.

• Improved sealing.

• Better Coatings.

• Redistributed cooling flows.

High Pressure Turbine

Redistributed cooling.

Improved sealing.

Redesigned Stage 1 Outer Air Seal (OAS).

New casting, restagger to balance number 3 bearing spool load.

Modified internal cooling. Platform cooling

Added cooling, improved cooling. Improved coating

Addition of a Brush Seal to reduce leakage of air on NGV OD.

High Pressure Turbine

Redistributed cooling.

Improved sealing.

Redesigned Stage 1 Outer Air Seal (OAS).

New casting, restagger to balance number 3 bearing spool load.

Modified internal cooling. Platform cooling

Added cooling, improved cooling. Improved coating

Addition of a Brush Seal to reduce leakage of air on NGV OD.

Turbine - HPT1

V2500-A5

V2500 SelectOneTM

LP Turbine

Improved efficiency and reduced fuel burn by:

• Re-staggered LPT vane.

Low Pressure Turbine

Re-stagger of LP Turbine Stage 3 Vanes

LP Turbine Stage 3 Rotor

Servicing

• Borescope Inspection limits same as A5

• Rotor 3 clapper inspection is the same as latest Post SB72-487 standard

• Compressor wash is no different from A5

Servicing

• VSV lubrication: There is no routine task.

• SelectOneTM requires SCN20 as minimum standard.

• SCN20 & 20A intermixable with SCN19 and above, across wing.

• Current A5 and SelectOneTM engines intermixable across wing.

• Identify and describe the differences of the SelectOneTM and the SelectOneTM retrofit engines.

Any Questions

Elliptical Leading Edge

SelectOneTM

Super Polished Blades

Improved Surface Finish - Stator Stages.

V2500 SelectOneTM

R8 Locking BladeRedesign

Circular profile on rotor 8 only, provides greater stress relief

Variable Stator Vanes

New lever arms and unison rings with ball-end bearings

Variable Stator Vanes

Rotor Stages 6-8 damper Wire Deletion

iae selectone engine differences

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