A320飞机维护手册 AMM 机载辅助动力 AIRBORNE AUXILIARY POWER3(85)

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 APU Power Plant Visual Inspection (APS 3200)
 WARNING : DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS
_______ WHEN YOU DO THE MAINTENANCE TASK(S).
 WARNING : DISCONNECT THE LOW TENSION ELECTRICAL SUPPLY 5 MINUTES BEFORE YOU
_______ START WORK ON THE IGNITION SYSTEM. ALSO, GROUND THE IGNITER LEAD WITH AN INSULATED DEVICE AS YOU DISCONNECT IT FROM THE IGNITER PLUG. HIGH CURRENT AND VOLTAGE, WHICH ARE USED IN THE IGNITION SYSTEM, CAN KILL YOU.
 WARNING : USE SOLVENTS/CLEANING AGENTS, SEALANTS AND OTHER SPECIAL MATERIALS
_______ ONLY WITH A GOOD SUPPLY OF AIR. OBEY THE MANUFACTURERS INSTRUCTIONS. PUT ON PROTECTIVE CLOTHING. DO NOT GET THEM IN YOUR MOUTH. DO NOT SMOKE. DO NOT BREATHE THE GAS. THESE MATERIALS ARE POISONOUS, FLAMMABLE AND SKIN IRRITANT. GET MEDICAL HELP IF YOUR SKIN OR EYES BECOME IRRITATED.
 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific circuit breaker(s) safety clip(s) No specific access platform 2.5 m (8 ft. 2 in.)

 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power 29-00-00-864-001 Put the Related Hydraulic System in the Depressurized
 Configuration before Maintenance Action 49-00-00-710-008 Operational Test of the APU (APS 3200) 52-41-00-010-001 Open the APU Doors for Access 52-41-00-410-001 Close the APU Doors after Access
 3. Job Set-up
__________
 Subtask 49-20-00-860-053
 A. Aircraft Maintenance Configuration.
 (1)
 Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).

 (2)
 On the panel 25VU, make sure that the APU MASTER SW pushbutton switch is off.

 (3)
 Put a warning notice in the cockpit to tell persons not to start the APU.

 (4)
 Make sure that the hydraulic systems are depressurized (Ref. TASK 29-00-00-864-001).

 Subtask 49-20-00-865-069
 B. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41

 Subtask 49-20-00-010-058
 C. Get Access
 (1)
 Put the access platform in position below the APU access doors 315AL and 316AR.

 (2)
 Open the access doors 315AL and 316AR (Ref. TASK 52-41-00-010-001).

 (3)
 Set the LIGHT control switch 11LJ to the on position.

 4. Procedure
_________
 Subtask 49-20-00-210-055
 A. Visual Inspection
 (1)
 Inspect the following APU power plant components for loose connectors, worn parts, cracks, distortion and corrosion:

 (a)
 The electrical connectors of the APU harness.

 (b)
 The connections, clamps and brackets of the APU harness.

 (c)
 The gearbox assembly.

 

 (2)
 Inspect the APU oil tubes and fuel tubes for leaks. No leaks are allowed.

 (3)
 Inspect the following systems for leaks and damage:

 (a)
 The APU fuel and control system.

 -
the fuel control,

 -
the fuel pump and housing,

 -
the solenoid valve,

 -
the servo valve,

 -
the fuel filter,

 -
the fuel flow divider,

 -
the main fuel manifold,

 -
the pilot fuel manifold,

 -
the combuster drain valve.

 

 (b)
 The APU ignition and starting system:

 -
the starter motor,

 -
the ignition exciter,

 -
the ignitor plugs,

 -
the ignitor cables.

 

 (c)
 The APU bleed and surge air subsystems:

 -
the inlet guide vane actuator,

 -
the air inlet pressure / temperature sensor,

 -
the bleed control valve,

 -
　
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