W DOC AIRBUS | AMM A320F

Inspection of the PS3 Line Connections [CFMI]

TASK 72-00-00-220-001-A
Inspection of the PS3 Line Connections

1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
ACCESS PLATFORM 1M(3 FT)
No specific
AR
WARNING NOTICE(S)
No specific
AR
WIRE - PLASTIC
No specific
Torque wrench: range to between 55 and 50 lbf.in (0.62 and 0.57 m.daN ) T
No specific
Torque wrench: range to between 150 and 135 lbf.in (1.70 and 1.53 m.daN ) T
No specific
Torque wrench: range to between 300 and 270 lbf.in (3.39 and 3.05 m.daN ) T
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.CP1041)
isopropyl alcohol
(Material No.CP2101)
graphite grease
(Material No.CP8001)
lockwire 0.032 in. (0.8 mm) dia.
(Material No.CP8002)
lockwire 0.032 in. (0.8 mm) dia
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR
 D. Referenced Information
REFERENCE
DESIGNATION
TASK 71-13-00-010-040-A
Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A
Closing of the Fan Cowl Doors
TASK 78-30-00-081-041-A
Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-A
Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-A
Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-A
Closing of the Thrust Reverser Doors
F Inspection/Check of the PS3 Line
3. Job Set-up
Subtask 72-00-00-941-062-A ** ON A/C NOT FOR ALL
A. Safety Precautions
   (1) On the center pedestal, on the ENG panel 115VU:
     (a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
   (2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
   (3) On the overhead maintenance panel 50VU:
     (a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
     (b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
Subtask 72-00-00-010-069-A ** ON A/C NOT FOR ALL
B. Get Access
   (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
   (2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
   (3) FOR [1000EM2] (ENGINE-2)
447AL 448AR
   (4) Put the ACCESS PLATFORM 1M(3 FT) in position.
Subtask 72-00-00-040-058-A ** ON A/C NOT FOR ALL
C. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).
Subtask 72-00-00-010-070-A ** ON A/C NOT FOR ALL
D. Open the thrust reverser doors (Ref. AMM TASK 78-36-00-010-040):
   (1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
   (2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
4. Procedure
Subtask 72-00-00-220-050-A ** ON A/C NOT FOR ALL
A. Inspection 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 hose (30) to the PS3 tube (20).
   (2) Disconnect the PS3 tube (20) from the PS3 hose (30).
   (3) Cut and remove the lockwire which safeties the PS3 tube (20) to the PS3 air tube (10).
   (4) Disconnect the PS3 tube (20) from the PS3 air tube (10).
   (5) Remove the nut (40), the bolt (60), the outer spring clip (50), the inner spring clip (80) and the plastic bushing (90) which attach the PS3 tube (20) to the bracket (70), on flange H, at the 5 o'clock position (Detail D).
   (6) Remove the PS3 tube (20) from the engine.
   (7) Inspect the connecting parts as follows:
INSPECT/CHECK
MAXIMUM SERVICEABLE LIMITS
REMARKS
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.
Chase the threads.
  • Safetywire hole deformation and wear.
Serviceable, provided metal around hole is not cracked or torn.

2.Fittings and reducer (150) seating surfaces for:


  • Circumferential scratches
Any amount not 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.
   (8) If necessary, clean the parts with: isopropyl alcohol (Material No.CP1041) .
   (9) If necessary, remove the dirt from the ECU nipple with a WIRE - PLASTIC. Take care to not introduce dirt into the ECU.

PRE SB CFMI 72-064

   (10) Check weep hole of the PS3 air tube (10) for clogging or dirt accumulation.
   (11) If necessary, clean the weep hole of the PS3 air tube (10) with isopropyl alcohol (Material No.CP1041) and a WIRE - PLASTIC.

SB CFMI 72-064

   (12) Check weep hole and weep hole fitting (water trap) of the PS3 air tube (10) for clogging or dirt accumulation.
   (13) If necessary, clean the weep hole and weep hole fitting with isopropyl alcohol (Material No.CP1041) and a WIRE - PLASTIC.

END OF SB CFMI 72-064

Subtask 72-00-00-420-052-A ** ON A/C NOT FOR ALL
B. Installation of the PS3 Line
CAUTION: DURING INSTALLATION, MAKE SURE THAT THE PS3 LINE DOES NOT TOUCH THE LOWER STARTER DUCT OR OTHER PARTS IN THIS AREA. IF IT DOES, CHAFING OF THE PS3 HOSE CAN OCCUR.
   (1) Lubricate the threads of the PS3 air tube (10) nipple with engine fuel.
   (2) Connect the PS3 tube (20) to the PS3 air tube (10) nipple.
   (3) Lubricate the threads of the bolt (60) with graphite grease (Material No.CP2101) .
   (4) Install the plastic bushing (90), the bolt (60), the inner spring clip (80), the outer spring clip (50) and the nut (40) to attach the PS3 tube (20) to the bracket (70), on flange H at the 5 o'clock position (Detail D).
   (5) TORQUE the PS3 tube (20) connecting nut to the PS3 air tube (10) to between 150 and 135 lbf.in (1.70 and 1.53 m.daN ) T.
   (6) Safety with CP8001lockwire 0.032 in. (0.8 mm) dia. or CP8002lockwire 0.032 in. (0.8 mm) dia.
   (7) TORQUE the nuts (40) to between 55 and 50 lbf.in (0.62 and 0.57 m.daN ) T.
   (8) Lubricate the ECU and PS3 tube (20) nipples with engine fuel.
   (9) Connect the PS3 hose (30) to the ECU and to the PS3 tube (20).
   (10) TORQUE the PS3 hose connecting nuts to between 300 and 270 lbf.in (3.39 and 3.05 m.daN ) T.
   (11) Safety with CP8001lockwire 0.032 in. (0.8 mm) dia. or CP8002lockwire 0.032 in. (0.8 mm) dia.
5. Close-up
Subtask 72-00-00-410-069-A ** ON A/C NOT FOR ALL
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close the thrust reverser doors (Ref. AMM TASK 78-36-00-410-040):
     (a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
     (b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 72-00-00-440-058-A ** ON A/C NOT FOR ALL
B. Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041).
Subtask 72-00-00-410-070-A ** ON A/C NOT FOR ALL
C. Close Access
   (1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
     (a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
     (b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
   (2) Remove the access platform(s).
   (3) Remove the WARNING NOTICE(S).
[Rev.10 from 2021] 2026.04.02 06:33:37 UTC
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