DOC AIRBUS | AMM A320FInstallation of the Forward Engine Mount Link Assemblies and Crossbeam Assembly without Engine Removal [CFMI]
TASK 71-21-11-400-043-A
Installation of the Forward Engine Mount Link Assemblies and Crossbeam Assembly without Engine Removal
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 71-21-11-860-053-A ** ON A/C NOT FOR ALL
Subtask 71-21-11-420-059-B ** ON A/C NOT FOR ALL
Subtask 71-21-11-080-051-A ** ON A/C NOT FOR ALL Subtask 71-21-11-410-061-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:22:46 UTC
Installation of the Forward Engine Mount Link Assemblies and Crossbeam Assembly without Engine Removal
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 | Torque wrench: range to between 0.282 and 0.226 m.daN (24.96 and 20.00 lbf.in )  | |
| No specific | Torque wrench: range to between 3.23 and 2.937 m.daN (23.82 and 21.66 lbf.ft ) | |
| 98D27803500001 | 1 | LOCKING TOOL ZERO POS |
| 98D71203003000 | 1 | RODS-FWD ENG MOUNT |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP1041) | isopropyl alcohol |
| (Material No.CP2215) | primer |
| (Material No.CP2541) | sealant RTV 88 |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| 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 |
Forward Engine Mount Links and CrossBeam InstallationSubtask 71-21-11-860-053-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
(4) Make sure that the slats are retracted and install the 98D27803500001 LOCKING TOOL ZERO POS on the flap and slat control lever.
(5) Make sure that the 98D71203003000 RODS-FWD ENG MOUNT are installed on the engine.
Subtask 71-21-11-010-063-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
(4) Make sure that the slats are retracted and install the 98D27803500001 LOCKING TOOL ZERO POS on the flap and slat control lever.
(5) Make sure that the 98D71203003000 RODS-FWD ENG MOUNT are installed on the engine.
B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(4) Make sure that the thrust reverser doors are open to the 45-degree position (Ref. AMM TASK 78-36-00-010-040):
(5) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(6) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
Subtask 71-21-11-040-055-A ** ON A/C NOT FOR ALL 4. Procedure(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(4) Make sure that the thrust reverser doors are open to the 45-degree position (Ref. AMM TASK 78-36-00-010-040):
(5) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(6) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
Subtask 71-21-11-420-059-B ** ON A/C NOT FOR ALL
A. Installation of the Crossbeam Assembly on the Beam Assembly
(1) Check the locking feature of the nuts (100).
(a) Install the nut (100) on the bolt (70) by hand until you can no longer turn the nut (100). Make sure the nut (100) is correctly installed on the bolt (70).
(b) With a torque wrench, tighten the nut (100) until at least three threads of the bolt (70) extend from the nut (100). If the force required to tighten the nut (100) is greater than 0.203 m.daN (17.96 lbf.in), you must replace the nut (100).
(c) With at least three threads of the bolt (70) extended from the nut (100), use a torque wrench to apply force to the nut (100) in the removal direction until the nut (100) begins to move. If the force required to start the nut is less than 0.023 m.daN (2.04 lbf.in), you must replace the nut (100).
(2) Install the crossbeam assembly (210) on the beam assembly with the attach pin (90), pin retainers (80), spacers (85), bolts (70), washers (75 and 95) and nuts (100).
(3) TORQUE the nuts (100) to between 0.282 and 0.226 m.daN (24.96 and 20.00 lbf.in ).
Subtask 71-21-11-420-060-B ** ON A/C NOT FOR ALL (1) Check the locking feature of the nuts (100).
(a) Install the nut (100) on the bolt (70) by hand until you can no longer turn the nut (100). Make sure the nut (100) is correctly installed on the bolt (70).
(b) With a torque wrench, tighten the nut (100) until at least three threads of the bolt (70) extend from the nut (100). If the force required to tighten the nut (100) is greater than 0.203 m.daN (17.96 lbf.in), you must replace the nut (100).
(c) With at least three threads of the bolt (70) extended from the nut (100), use a torque wrench to apply force to the nut (100) in the removal direction until the nut (100) begins to move. If the force required to start the nut is less than 0.023 m.daN (2.04 lbf.in), you must replace the nut (100).
(2) Install the crossbeam assembly (210) on the beam assembly with the attach pin (90), pin retainers (80), spacers (85), bolts (70), washers (75 and 95) and nuts (100).
(3) TORQUE the nuts (100) to between 0.282 and 0.226 m.daN (24.96 and 20.00 lbf.in )
. WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
(4) Apply a torque stripe to the nuts (100). Use F-925 torque seal. B. Installation of the Link Assemblies on the Crossbeam Assembly
(1) Check the locking feature of the nuts (110 and 145).
(a) Install the nuts (110 and 145) on the bolts (115 and 150) by hand until you can no longer turn the nuts (110 and 145). Make sure the nuts (110 and 145) are correctly installed on the bolts (115 and 150).
(b) With a torque wrench, tighten the nuts (110 and 145) until at least three threads of the bolts (115 and 150) extend from the nuts (110 and 145). If the force required to tighten the nuts (110 and 145) is greater than 0.203 m.daN (17.96 lbf.in), you must replace the nuts (110 and 145).
(c) With at least three threads of the bolts (115 and 150) extended from the nuts (110 and 145), use a torque wrench to apply force to the nuts (110 and 145) in the removal direction until the nuts (110 and 145) begin to move. If the force required to start the nuts (110 and 145) is less than 0.023 m.daN (2.04 lbf.in), you must replace the nuts (110 and 145).
(2) Install the link assemblies (25) on the crossbeam assembly (210) with the attach pins (125), pin retainers (130), bolts (115 and 150), washers (105, 120, 135 and 140) and nuts (110 and 145).
(3) Torque the nuts (110 and 145) to between 0.282 and 0.226 m.daN (24.96 and 20.00 lbf.in ).
Subtask 71-21-11-420-061-A ** ON A/C NOT FOR ALL (1) Check the locking feature of the nuts (110 and 145).
(a) Install the nuts (110 and 145) on the bolts (115 and 150) by hand until you can no longer turn the nuts (110 and 145). Make sure the nuts (110 and 145) are correctly installed on the bolts (115 and 150).
(b) With a torque wrench, tighten the nuts (110 and 145) until at least three threads of the bolts (115 and 150) extend from the nuts (110 and 145). If the force required to tighten the nuts (110 and 145) is greater than 0.203 m.daN (17.96 lbf.in), you must replace the nuts (110 and 145).
(c) With at least three threads of the bolts (115 and 150) extended from the nuts (110 and 145), use a torque wrench to apply force to the nuts (110 and 145) in the removal direction until the nuts (110 and 145) begin to move. If the force required to start the nuts (110 and 145) is less than 0.023 m.daN (2.04 lbf.in), you must replace the nuts (110 and 145).
(2) Install the link assemblies (25) on the crossbeam assembly (210) with the attach pins (125), pin retainers (130), bolts (115 and 150), washers (105, 120, 135 and 140) and nuts (110 and 145).
(3) Torque the nuts (110 and 145) to between 0.282 and 0.226 m.daN (24.96 and 20.00 lbf.in )
. WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
(4) Apply a torque stripe to the nuts (110 and 145). Use F-925 torque seal. C. Installation of the Link Assemblies on the Support Assemblies
(2) Check the locking feature of the nuts (35).
(a) Install the nut (35) on the bolt (60) by hand until you can no longer turn the nut (35). Make sure the nut (35) is correctly installed on the bolt (60).
(b) With a torque wrench, tighten the nut (35) until at least three threads of the bolt (60) extend from the nut (35). If the force required to tighten the nut (35) is greater than 0.904 m.daN (80.00 lbf.in), you must replace the nut (35).
(c) With at least three threads of the bolt (60) extended from the nut (35), use a torque wrench to apply force to the nut (35) in the removal direction until the nut (35) begins to move. If the force required to start the nut (35) is less than 0.107 m.daN (9.47 lbf.in), you must replace the nut (35).
(4) Allow the primer (Material No.CP2215) to fully cure. Refer to the manufacturer's instructions.
(a) Hold the nuts (30 or 35) while you TORQUE the bolts (60) to between 3.23 and 2.937 m.daN (23.82 and 21.66 lbf.ft ). Do not allow the wings of the retainers (45) or the wings of the nuts (30) to contact the sides of the link assemblies (25).
(b) Hold the nuts (30 or 35) and continue to torque the bolts (60) until the bolt holes in the retainers (65) align with the bolt holes in the retainers (45) when you put the retainers (65) over the heads of the bolts (60). Do not exceed the maximum torque of 3.616 m.daN (26.67 lbf.ft). Do not allow the wings of the retainers (45) or the wings of the nuts (30) to contact the sides of the link assemblies (25).
(8) Check the locking feature of the nuts (20).
(a) Install the nut (20) on the bolt (5) by hand until you can no longer turn the nut (20). Make sure the nut (20) is correctly installed on the bolt (5).
(b) With a torque wrench, tighten the nut (20) until at least three threads of the bolt (5) extend from the nut (20). If the force required to tighten the nut (20) is greater than 0.203 m.daN (17.96 lbf.in), you must replace the nut (20).
(c) With at least three threads of the bolt (5) extended from the nut (20), use a torque wrench to apply force to the nut (20) in the removal direction until the nut (20) begins to move. If the force required to start the nut (20) is less than 0.023 m.daN (2.04 lbf.in), you must replace the nut (20).
(9) Connect the retainers (65) to the retainers (45) with the washers (10 and 15), bolts (5) and nuts (20).
(10) Torque the nuts (20) to between 0.282 and 0.226 m.daN (24.96 and 20.00 lbf.in ).
(11) Apply sealant RTV 88 (Material No.CP2541) to the engine mount system.
(b) Remove any temporary shims and fill the space between the wings on the nuts (30) and the link assemblies (25) with sealant RTV 88 (Material No.CP2541) . Refer to the manufacturer's instructions.
(c) Apply a bead of sealant RTV 88 (Material No.CP2541) around the head of the bolts (60). Make sure the sealant RTV 88 (Material No.CP2541) fills any gaps between the retainers (65) and the heads of the bolts (60). Refer to the manufacturer's instructions.
(d) Allow the sealant RTV 88 (Material No.CP2541) to fully cure. Refer to the manufacturer's instructions.
5. Close-upWARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
(1) Clean the link assemblies (25), attaching hardware and support assemblies (40) with a cloth made moist with isopropyl alcohol (Material No.CP1041) . Then clean the surface with a clean, dry cotton cloth before the solvent dries. (2) Check the locking feature of the nuts (35).
(a) Install the nut (35) on the bolt (60) by hand until you can no longer turn the nut (35). Make sure the nut (35) is correctly installed on the bolt (60).
(b) With a torque wrench, tighten the nut (35) until at least three threads of the bolt (60) extend from the nut (35). If the force required to tighten the nut (35) is greater than 0.904 m.daN (80.00 lbf.in), you must replace the nut (35).
(c) With at least three threads of the bolt (60) extended from the nut (35), use a torque wrench to apply force to the nut (35) in the removal direction until the nut (35) begins to move. If the force required to start the nut (35) is less than 0.107 m.daN (9.47 lbf.in), you must replace the nut (35).
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
(3) Apply primer (Material No.CP2215) to the surfaces of the following components where you will apply sealant RTV 88 (Material No.CP2541) : the retainers (45 and 65), link assemblies (25), washers (55), nuts (30) and heads of the bolts (60). Refer to the manufacturer's instructions. Refer to Figure 1001 (sheet 2). (4) Allow the primer (Material No.CP2215) to fully cure. Refer to the manufacturer's instructions.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
(5) Apply sealant RTV 88 (Material No.CP2541) to the surfaces of the washers (55) and the retainers (45) that interface with the link assemblies (25). CAUTION:
THE WINGS OF THE RETAINERS (45) AND WINGS OF THE NUTS (30) CAN DAMAGE THE SIDES OF THE LINK ASSEMBLIES (25). DO NOT ALLOW THE WINGS OF THE RETAINERS (45) AND WINGS OF THE NUTS (30) TO CONTACT THE SIDES OF THE LINK ASSEMBLIES (25).
CAUTION:
MAKE SURE YOU INSTALL THE SLIP FIT BUSHINGS (50).
(6) Before the sealant RTV 88 (Material No.CP2541) hardens, connect the link assemblies (25) to the support assemblies (40) with the bushings (50), bolts (60), washers (55), nuts (30 or 35) and retainers (45). Do not allow the wings of the retainers (45) or the wings of the nuts (30) to contact the sides of the link assemblies (25). Do not torque the bolts (60) at this time. NOTE: You can put temporary wooden shims between the wings of the retainers (45) and wings of the nuts (30) and the sides of the link assemblies (25) to protect the link assemblies (25) while you torque the bolts (60).
NOTE: You can adjust the length of the rods of the 98D71203003000 RODS-FWD ENG MOUNT to make the link assemblies (25) align with the support assemblies (40).
(7) Torque the bolts (60). (a) Hold the nuts (30 or 35) while you TORQUE the bolts (60) to between 3.23 and 2.937 m.daN (23.82 and 21.66 lbf.ft )
. Do not allow the wings of the retainers (45) or the wings of the nuts (30) to contact the sides of the link assemblies (25). (b) Hold the nuts (30 or 35) and continue to torque the bolts (60) until the bolt holes in the retainers (65) align with the bolt holes in the retainers (45) when you put the retainers (65) over the heads of the bolts (60). Do not exceed the maximum torque of 3.616 m.daN (26.67 lbf.ft). Do not allow the wings of the retainers (45) or the wings of the nuts (30) to contact the sides of the link assemblies (25).
(8) Check the locking feature of the nuts (20).
(a) Install the nut (20) on the bolt (5) by hand until you can no longer turn the nut (20). Make sure the nut (20) is correctly installed on the bolt (5).
(b) With a torque wrench, tighten the nut (20) until at least three threads of the bolt (5) extend from the nut (20). If the force required to tighten the nut (20) is greater than 0.203 m.daN (17.96 lbf.in), you must replace the nut (20).
(c) With at least three threads of the bolt (5) extended from the nut (20), use a torque wrench to apply force to the nut (20) in the removal direction until the nut (20) begins to move. If the force required to start the nut (20) is less than 0.023 m.daN (2.04 lbf.in), you must replace the nut (20).
(9) Connect the retainers (65) to the retainers (45) with the washers (10 and 15), bolts (5) and nuts (20).
(10) Torque the nuts (20) to between 0.282 and 0.226 m.daN (24.96 and 20.00 lbf.in )
. (11) Apply sealant RTV 88 (Material No.CP2541) to the engine mount system.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
CAUTION:
THE WINGS OF THE RETAINERS (45) AND WINGS OF THE NUTS (30) CAN DAMAGE THE SIDES OF THE LINK ASSEMBLIES (25). THE RTV 88 MAKES A CUSHION BETWEEN THE COMPONENTS AND SECURES THE BOLTS (60).
(a) Remove any temporary shims and fill the space between the retainers (45 and 65) and the link assemblies (25) with sealant RTV 88 (Material No.CP2541) . Refer to the manufacturer's instructions. (b) Remove any temporary shims and fill the space between the wings on the nuts (30) and the link assemblies (25) with sealant RTV 88 (Material No.CP2541) . Refer to the manufacturer's instructions.
(c) Apply a bead of sealant RTV 88 (Material No.CP2541) around the head of the bolts (60). Make sure the sealant RTV 88 (Material No.CP2541) fills any gaps between the retainers (65) and the heads of the bolts (60). Refer to the manufacturer's instructions.
(d) Allow the sealant RTV 88 (Material No.CP2541) to fully cure. Refer to the manufacturer's instructions.
Subtask 71-21-11-080-051-A ** ON A/C NOT FOR ALL Subtask 71-21-11-410-061-A ** ON A/C NOT FOR ALL
B. Close the thrust reverser cowl doors (Ref. AMM TASK 78-36-00-410-040):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
Subtask 71-21-11-440-053-A ** ON A/C NOT FOR ALL Subtask 71-21-11-410-062-A ** ON A/C NOT FOR ALL (1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
D. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(3) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(4) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(5) Remove the WARNING NOTICE(S).
(6) On the panel 114VU, remove the locking tool from the flap and slat control lever.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(3) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(4) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(5) Remove the WARNING NOTICE(S).
(6) On the panel 114VU, remove the locking tool from the flap and slat control lever.