飞机启动系统.ppt

1、Contents,General description The ducting system and SOV Starter Switching The start sequence Functional block Fault reasons Fault tree and isolation procedure,General Description,CFM56-5C Manufactured by CFM International Used on Airbus A340-200 and A340-300 Thrust rating: 3120034000 lb.f Features:

2、Lowest SFC of CFM56 family Lower noise High thrust-to-weight ratio Second-generation FADEC Long-duct, mixed-flow nacelle,5.Structural Data 1 stage fan and 4 stage booster 9 stage compressor 4 stage HP turbine 1 stage LP turbine,Ducting system,Air come from three source: APU Ground air cart Other eng

3、ine RH and LH connect through a cross bleed valve,Check valve to protect APU,Ducting system,Shut-off valve,Between the top and lower duct Used to control the air quantity Controlled by ECU,Starter,Switching,Each pushbutton serves for: manual start motoring,Enable start sequence,Choose work condition

4、,To start: 1:ENG START set to IGN/START 2:ENG MASTER to “ON”,Start sequence,Stage 1: Starter drive Engine (open SOV),Stage 2: Turbine start drive Engine (N222% ignition),Stage 3: starter stop working (N250 close SOV cut ignition),1,2,3,Functional diagram,Functional diagram,Fault Reasons,Top and lower starter duct ( duct and connections leak),Starter SOV ( cant open fully),Starter (tears and FOD or high