(7)
 Examine the exhaust muffler (Ref. TASK 49-81-00-200-009).

 (8)
 Examine the exhaust duct felt-metal and replace if necessary (Ref. TASK 49-81-41-000-003) and (Ref. TASK 49-81-41-400-003)

 (9)
 Examine the drain tank for leaks, dents, chafing and cracks. If necessary replace the drain tank (Ref. TASK 49-17-41-000-003) and (Ref. TASK 49-17-41-400-003).

 (10)
 Examine the drain tubes and hoses between the spring adapters and the drain mast. Replace porous hoses and/or bent, kinked, holed or leaking tubes.

 (11)
 Examine the support assembly of the oil-cooler outlet-duct attachment. If necessary remove (Ref. TASK 49-52-41-000-003) and install a new support assembly (Ref. TASK 49-52-41-400-003).

 (12)
 Make sure that the threads of the vent and drain valve (21) are clean and in a correct condition.

 (13)
 Make sure that the:

 -electrical cables of the APU starter motor
 -ring terminals of the starter motor cables
 are clean and in a correct condition.

 (14)
 Make sure that the:

 -phase leads of the APU generator
 -ring terminals of the APU generator phase leads are clean and in a correct condition.

 (15)
 Put the SUPPORT FRAME - APU (with the APU temporarily installed on it) in the correct position below the APU compartment.

 (16)
 Make sure that the HOIST - MINILIFT is installed correctly (Ref. TASK 49-00-00-480-003).

 (17)
 Remove the blanking covers from APU exhaust and hot-nozzle
 assy-flange.

 (18)
 Make sure that the hot-nozzle assy-flange is in the temporary position to which it was moved during APU removal.

 NOTE : There must be sufficient clearance between the hot-nozzle assy
____ and exhaust flange to prevent damage to the APU during installation.
 Subtask 49-11-11-420-060-A
 C. Installation of the APU
 (1) Removal of the APU from the SUPPORT FRAME - APU.
 WARNING : OBEY THE HOISTING SAFETY PROCEDURES.
_______ MAKE SURE THAT THE HOIST IS ASSEMBLED AND ATTACHED CORRECTLY BEFORE YOU PUT A LOAD ON IT. OBEY THE MANUFACTURER'S INSTRUCTIONS WHEN YOU USE THE HOIST. IF THE HOIST IS IN AN INCORRECT CONDITION THE LOAD CAN MOVE ACCIDENTALLY AND KILL PERSONS OR CAUSE INJURY.
 CAUTION : MAKE SURE THAT ALL PLUMBING IS FREE FROM OBSTRUCTION.
_______
 (a)
 Connect the HOIST - MINILIFT to the APU (Ref. TASK 49-00-00-480-003).

 (b)
 Operate the HOIST - MINILIFT carefully until the APU weight is removed from the SUPPORT FRAME - APU, then disconnect the APU from the SUPPORT FRAME - APU.

 NOTE : Turn the upper drum shaft of the HOIST - MINILIFT until
____ you have removed the slack from the hoist cable. Then disconnect the APU from the SUPPORT FRAME - APU. Make sure that you do not lift the SUPPORT FRAME - APU.
 NOTE : Do a check and make sure that the HOIST - MINILIFT is
____ assembled and installed correctly.
 (2) Installation of the APU on the APU mount vibration-isolators. (Ref. Fig. 404A/TASK 49-11-11-991-011-A)
 CAUTION : BE CAREFUL WHEN YOU ENGAGE THE TWO FORWARD MOUNT BRACKETS
_______ ON THE VIBRATION ISOLATORS. THE MACHINED FACES ON THE CONE BOLTS OF THE VIBRATION ISOLATORS MUST BE ALIGNED WITH THE SLOTS ON THE MOUNT BRACKETS. IF NOT YOU WILL CAUSE DAMAGE TO THE MATING FACES.
 CAUTION : DO NOT TURN THE HOIST HANDLE MORE THAN 90 DEGREES WHEN THE
_______ APU MOUNT BRACKETS ARE TIGHTLY ENGAGED ON THE VIBRATION ISOLATORS. IF YOU TURN THE HOIST HANDLE MORE THAN 90 DEGREES, YOU CAN CAUSE DAMAGE TO THE APU AND THE APU MOUNTS.
 CAUTION : DO NOT RELEASE THE LOAD FROM THE HOIST UNTIL THE MOUNT NUTS
_______ ARE TORQUED. IF THE MOUNT NUTS HOLD THE LOAD BEFORE THEY ARE TORQUED, YOU CANNOT APPLY THE CORRECT TORQUE VALUE.
 CAUTION : MAKE SURE THAT ALL PLUMBING IS FREE FROM OBSTRUCTION.
_______
 (a)
 Operate the HOIST - MINILIFT and carefully lift the APU into the correct position in the APU compartment.

 (b)
 Carefully engage the APU mount brackets (46) on the APU vibration isolators.

 (c)
 Remove the PROTECTOR - THREADS, APU MOUNTING BOLTS from the threads (41) of the rear APU mount and the vibration isolators.

 (d)
 Installation of the nuts (47), (48) and (50).

 1_ Install and turn the nuts (47), (48) and (50) a few turns on
 the threads (41) of the vibration isolators and aft mount
 bracket.
 2_ Use a torque wrench to turn the nuts and measure the breakaway
 torques of the nuts (47), (48) and (50). 
　
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：A320飛機維護手冊 AMM 機載輔助動力 AIRBORNE AUXILIARY POWER2(48)