W DOC AIRBUS | AMM A320F

Borescope Plug D Removal and Installation Procedure [CFML]

TASK 72-24-00-300-801-A
Borescope Plug D Removal and Installation Procedure

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
WARNING: USE GOGGLES WHEN YOU REMOVE OR INSTALL SAFETY CABLE. EACH TIME YOU CUT SAFETY CABLE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE SAFETY CABLE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.
ZONE: 210
ZONE: 400
1. Reason for the Job
This procedure provides instructions for the borescope plug D removal and installation for bore-blending repair purposes.
NOTE: You can use equivalent alternatives for standard tools, equipment and consumable materials.
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE
No specific
AR
WARNING NOTICE(S)
No specific
Torque wrench: range to between 0.64 and 0.60 m.daN (57 and 53 lbf.in ) T
No specific
Torque wrench: range to between 1.36 and 1.24 m.daN (120 and 110 lbf.in ) T
No specific
Torque wrench: range to between 2.14 and 1.82 m.daN (16 and 13 lbf.ft ) T
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.CP2442)
engine oil
(Material No.CP8006)
safety cable 0.032 in. (0.8 mm) US SPEC M50 TF 9 C1-A
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
210
CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
400
POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR, 461AL, 462AR
 D. Referenced Information
REFERENCE
DESIGNATION
TASK 70-24-00-910-815-A
Locking Procedures
TASK 71-13-00-010-803-A
Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A
Closing of the Fan Cowl Doors
TASK 72-00-00-290-812-A
Engine Borescope Examination Preparation
TASK 72-24-01-000-801-A
Removal of Segment Shrouds 1 thru 5
TASK 72-24-01-400-801-A
Installation of Segment Shrouds 1 thru 5
TASK 75-32-05-910-801-A
Manually Operate the Variable Stator Vane (VSV) Actuator
TASK 78-30-00-040-809-A
Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-809-A
Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-806-A
Opening of the Thrust Reverser Cowl Doors
TASK 78-36-00-410-806-A
Closing of the Thrust Reverser Cowl Doors
F Borescope Plug D
F Borescope Plug D
F Borescope Plug D
3. Job Set-up
Subtask 72-24-00-941-052-A
A. Safety Precautions
   (1) On the center pedestal, on ENG panel 115VU:
     (a) Make sure that the ENG/MODE selector switch is in the NORM position.
     (b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
     (c) Put a WARNING NOTICE(S) in position to tell persons not to operate:
  • The ENG/MODE selector switch
  • The ENG/MASTER 1(2) control switch.
   (2) On the ENG section of maintenance panel 50VU:
     (a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
     (b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
Subtask 72-24-00-010-053-A
B. Get Access
   (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR.
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR.
Subtask 72-24-00-040-051-A
C. Deactivation of the Thrust Reverser (T/R) System for Maintenance
WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.
   (1) Do the deactivation of the T/R system for ground maintenance (Ref. AMM TASK 78-30-00-040-809).
Subtask 72-24-00-010-052-A
D. Get Access
   (1) Open the T/R cowl doors (Ref. AMM TASK 78-36-00-010-806):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL, 452AR.
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL, 462AR.
   (2) Put an ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE in position.
4. Procedure
CAUTION: MAKE SURE THE TEMPERATURE OF THE ENGINE AND OF THE AREAS ADJACENT TO THE BORESCOPE INSPECTION PORTS IS LESS THAN 150 °F (65.6 °C). DO NOT DO A BORESCOPE INSPECTION IF THE ADJACENT AREAS ARE TOO HOT TO TOUCH. DO THE BORESCOPE INSPECTION WHEN THE ENGINE TEMPERATURE IS LESS THAN 150 F(65.6 C). THIS WILL PREVENT DAMAGE TO THE BORESCOPE EQUIPMENT.
Subtask 72-24-00-000-050-A
A. Removal of the Borescope Plug D
   (1) If not yet removed, remove the shroud segment 3 (Ref. AMM TASK 72-24-01-000-801).
   (2) If necessary for access purposes, remove the shroud segment 2 (Ref. AMM TASK 72-24-01-000-801).
   (3) Remove the borescope plug D as follows:
     (a) If necessary, operate manually the Variable Stator Vane (VSV) system (Ref. AMM TASK 75-32-05-910-801) to make sure that the borescope plug D is accessible. Make sure the clearance between the lower and upper Inlet Guide Vane (IGV) ring is aligned with borescope plug D.
NOTE: Borescope plug D access is possible without IGV connecting link removal when the VSV system is in the fully opened position.
     (b) If necessary, remove the connecting link that connect the upper and lower IGV rings.
       1 Remove the self-locking nut and the machine bolt that attach the turnbuckle/fixed links to the clevis of the connecting link.
       2 Remove and discard the safety cable from the bolts that attach the connecting link.
     (c) Manually hold the connecting link during the steps that follows:
       1 Remove the bolts from the connecting link.
       2 Remove the pins from the connecting link.
       3 Remove the connecting link from the lower IGV ring and the upper IGV ring.
       4 Remove the borescope plug D from the borescope port D.
Subtask 72-24-00-400-050-A
B. Installation of the Borescope Plug D
   (1) Install borescope plug D in the borescope port D as follows:
     (a) Do a visual inspection of the borescope plug D and the borescope port D (Ref. AMM TASK 72-00-00-290-812).
     (b) Put engine oil (Material No.CP2442) on the borescope plug D threads and the mating surfaces.
     (c) Install the borescope plug D in the borescope port D.
     (d) TORQUE the borescope plug D to between 2.14 and 1.82 m.daN (16 and 13 lbf.ft ) T.
   (2) If previously removed, reinstall the connecting link that connect the lower and upper IGV rings as follows:
     (a) Put and hold the connecting link at 4:30 o’clock onto the lower IGV ring and onto the upper IGV ring.
     (b) Align the holes of the connecting link with the holes of the lower IGV ring and the holes of the upper IGV ring.
     (c) Manually hold the connecting link during the steps that follow:
       1 Install the pins through the connecting link and the lower and upper IGV rings.
NOTE: The two flats of the pins must point each other.
     (d) Install the external bolts as follows:
       1 Lubricate the external bolts with engine oil (Material No.CP2442) .
       2 Install loosely the external bolt near the pin through the connecting link and the lower IGV ring.
       3 Install loosely the external bolt near the pin through the connecting link and the upper IGV ring.
     (e) Make sure that the head of the two bolts overlap the heads of the two pins.
     (f) Install the two internal bolts as follows:
       1 Lubricate the internal bolts with engine oil (Material No.CP2442) .
       2 Install loosely the internal bolt through the connecting link and the lower IGV ring.
       3 Install loosely the internal bolt through the connecting link and the upper IGV ring.
       4 Torque the bolts to between 0.64 and 0.60 m.daN (57 and 53 lbf.in ) T.
     (g) Protection:
       1 Attach the bolts with CP8006safety cable 0.032 in. (0.8 mm) US SPEC M50 TF 9 C1-A (Ref. AMM TASK 70-24-00-910-815).
     (h) Attach the turnbuckle/fixed links to the connecting link as follows:
       1 Apply a layer of engine oil (Material No.CP2442) to the threads of the nut.
       2 Move the turnbuckle/fixed links into the clevis of the connecting link.
       3 Attach the turnbuckle/fixed links into the connecting link with the bolt, bolt-head forward and nut.
       4 Torque the nut to between 1.36 and 1.24 m.daN (120 and 110 lbf.in ) T.
   (3) Reinstall the shroud segment 2 (Ref. AMM TASK 72-24-01-400-801).
   (4) If removed, install the shroud segment 3 (Ref. AMM TASK 72-24-01-400-801).
5. Close-up
Subtask 72-24-00-410-053-A
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close the T/R cowl doors (Ref. AMM TASK 78-36-00-410-806):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL, 452AR.
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL, 462AR.
Subtask 72-24-00-440-052-A
B. Reactivate the T/R system after ground maintenance (Ref. AMM TASK 78-30-00-440-809).
Subtask 72-24-00-410-056-A
C. Close Access
   (1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR.
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR.
   (2) Remove the WARNING NOTICE(S).
[Rev.10 from 2021] 2026.04.01 13:04:15 UTC
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