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25 Cards in this Set
- Front
- Back
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Engine Type |
T700-GE-401C |
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5 sections |
Inlet, compressor, combustor, turbine and exhaust |
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Eng anti-ice |
Fifth stage bleed air to inlet |
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Compressor |
5 stage axial and single stage centifigal. |
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Combustor |
Annular combustion chamber, two ignitors and 12 fuel nozzels |
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Gas generator turbine |
Two stage, drives accessory gearbox and compressor |
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Power turbine |
Two stage, turns the power turbine drive shaft |
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Eng control system |
HMU, ODV, DECU, alternator, fuel flow control valves |
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Lockout disables |
TGT limiting, Np governing and load sharing. Np overspeed remains |
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Engine fuel system |
Engine driven boost pump, fuel filter, HMU, ODV |
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HMU components |
HP fuel pump, Ng governor, metering valve, LVDT, Q motor servo, variable geometry vane servo, vapor vent, shut off valve |
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PAS inputs to the HMU |
Fuel shut off, engine start fuel flow and acceleration to idle, max Ng, fuel priming, Lockout |
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When does Ng governor operate? |
Max Ng during cold ambient operation and max TGT during electrical failure |
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Ng overspeed valve trip speed? |
110 +-2 percent Ng |
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HMU higher PAS settings |
Fail safe to high power if loss of elec power to Q motor servo. Power available with OEI. |
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6 Functions of HMU |
Rapid engine transient response, auto fuel scheduling for start, Ng overspeed, Ng governing, acceleration limiting, flameout and compressor stall protection. |
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4 functions of ODV |
Fuel flow to 12 injectors, purge the main fuel manifold, trap fuel upstream to prevent fuel priming, returns fuel to HMU during Np overspeed or hot start |
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3 functions of alternator |
AC power to ingnitor, DECU and Ng signal to VIDS |
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15 functions of DECU |
Np governing, Np overspeed, TGT limiting, engine load sharing, engine trim speed, C-power, Np overspeed test, Lockout, cockpit signals, hot start prevention, fault dignaostic, 400hz airframe power, TDI, auto ignition, Ng decay relight. |
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TGT limiting (IRP) |
Reduce fuel flow at 839 +-10 to 851 degrees |
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TGT limiting (CRP) |
Limits fuel flow at 891+-10 to 903 degrees |
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Hot start prevention |
900 degrees below 60% Ng and 50 Np |
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Np overspeed |
120% Np |
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CEDECU Q codes |
35+-2.9 = Navy, 15+-2.9 = Army |
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EDECU funtions |
MRP limits TGT to 866+-10, Auto C-power when OEI (<50 Q) |
