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(b) Remove the nut (160), the bolt (190) and the clamp (180) which attach the PS3 tube (170) to the bracket (150), on flange P, at the 8 o'clock position (Detail F).
(c) Cut and remove the lockwires.
(d) Disconnect the PS3 tube (170) from the restrictor (200).
(e) Remove the restrictor from the engine.
(4) Cut and remove the lockwires.
(5) Disconnect the PS3 hose (20) from the ECU and from the PS3 tube (10).
(6) Check the hose for blockage blocked hose is not serviceable: Replace the hose (20).
(7) Blow clean dry air into the PS3 tube (10) end to remove any dirt or water accumulation in the PS3 line.
Subtask 72-00-00-020-052
C. Removal of the PS3 Line Connections
NOTE : Do the steps which follows only if you suspect leakage.
____
(1) Cut and remove the lockwire which safeties the PS3 tube (10) to the tube bundle.
(2) Disconnect the PS3 tube (10) from the tube bundle.
(3) Remove the parts which attach the PS3 tube (10) to the engine as follows:
------------------------------------------------------------------------| REMOVE FROM NOTE |
------------------------------------------------------------------------Nut (70) Bracket (40) and P25 At the 6:30 o'clock
Bolt (30) tube on flange G position (Detail C)
Outer spring clip (60)
Inner spring clip (50)
Plastic bushing (80)
Nut (130) Bracket (120) and P25 At the 5 o'clock
Bolt (90) on flange G position (Detail C)
Outer spring clip (100)
Inner spring clip (110)
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------------------------------------------------------------------------| REMOVE FROM NOTE | ------------------------------------------------------------------------Plastic bushing (140)
(4) Remove the PS3 tube (10) from the engine.
Subtask 72-00-00-210-069
D. Inspection of the PS3 Line Connection
(1) Inspect the connecting parts as follows:
-------------------------------------------------------------------------------INSPECT/CHECK MAXIMUM REMARKS SERVICEABLE LIMITS -------------------------------------------------------------------------------
1. Fitting nuts for:
- damaged corners Any amount, provided proper torque can be obtained
- damaged threads Any amount, provided effective threads are
not reduced by more than one after chasing
- safetywire hole deformation and wear Serviceable, providedmetal around hole is not
cracked or torn
Chase the threads
2. Fittings and restrictor (200) seating surfaces for:
- circumferential Any amount not
scratches detectable with a 0.04
in. (1 mm) radius ball
scribe
- axial scratches Not serviceable Replace the tube or the
part
- nicks, pits Not serviceable Replace the tube or the
part
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(2) If necessary, clean the parts with: stoddart solvent (Material No. CP2011) or ardrox 552 (Material No. CP2559) or turco ind 79 (Material No. CP2560) or mag-chem teksol (Material No. CP2566) or degreasol 99R (Material No. CP2584) or mag-chem skysol (Material No. CP2656) or acetone (Material No. CP1039) or isopropyl alcohol (Material No. CP1041).
(3) If necessary, remove the dirt from the ECU nipple with a plastic wire. Take care to not introduce dirt into the ECU.
(4) Check the tube bundle weep hole for clogging or dirt accumulation.
(5) If necessary, clean the tube bundle weep hole with stoddart solvent (Material No. CP2011) or acetone (Material No. CP1039) or isopropyl alcohol (Material No. CP1041) or ardrox 552 (Material No. CP2559) or turco ind 79 (Material No. CP2560) or mag-chem teksol (Material No. CP2566) or degreasol 99 R (Material No. CP2584) or mag-chem skysol (Material No. CP2656) and a plastic wire.
Subtask 72-00-00-420-056
E. Installation of the PS3 Line
(1) Install the reducer (200) on the core engine.
(2) TORQUE the reducer to between 270 and 300 lbf.in (3.05 and 3.39 m.daN).
(3) Safety with lockwire 0.032 in. (0.8 mm) dia. (Material No. CP8001) or lockwire 0.032 in. (0.8 mm) dia. (Material No. CP8002). 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320飞机维护手册 AMM ENGINE 发动机 1(64)
