DOC AIRBUS | AMM A320FInstallation of the Common Nozzle Assembly (CNA) [IAE]
TASK 78-11-11-400-010-A
Installation of the Common Nozzle Assembly (CNA)
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Expendable Parts
E. Referenced Information
3. Job Set-up
Subtask 78-11-11-860-051-A ** ON A/C NOT FOR ALL
Subtask 78-11-11-420-051-B ** ON A/C NOT FOR ALL
Subtask 78-11-11-410-053-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:27:02 UTC
Installation of the Common Nozzle Assembly (CNA)
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
CAUTION:
THIS PART IS A REMOVABLE STRUCTURAL COMPONENT (RSC), WHICH CAN BE MOVED BETWEEN AIRCRAFT. THUS IT CAN HAVE DIFFERENT OPERATION CONDITIONS AND A DIFFERENT LIFE RECORD (FLIGHT HOURS/FLIGHT CYCLES/CALENDAR) FROM THE AIRCRAFT IT IS INSTALLED ON OR REMOVED FROM. THE OPERATOR IS RESPONSIBLE FOR THE SPECIFIC TRACKING AND CONTINUED AIRWORTHINESS OF REMOVABLE STRUCTURAL COMPONENTS. INCORRECT MAINTENANCE OF THESE COMPONENTS CAN CAUSE A RISK FOR THE FLIGHT SAFETY.
1. Reason for the JobNOTE: For interchangeability see IAE SIL-171.
2. Job Set-up InformationA. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE |
| No specific | 1 | MALLET - PLASTIC |
| No specific | AR | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 70 and 50 lbf.in (0.79 and 0.57 m.daN )  | |
| No specific | Torque wrench: range to between 160 and 150 lbf.in (1.81 and 1.70 m.daN ) | |
| IAE1N20001 | 1 | FIXTURE-COMMON NOZZLE ASSEMBLY |
| IAE1N20004 | 1 | DOLLY-COMMON NOZZLE ASSEMBLY |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.V10-094) | anti-seize compound |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 34 | SEAL | AIPC 75-22-41-80-030 |
| 16 | SHIM | AIPC 78-11-11-80-178 |
| 16 | SHIM | AIPC 78-11-11-80-180 |
| 16 | SHIM | AIPC 78-11-11-80-182 |
| 16 | SHIM | AIPC 78-11-11-80-184 |
| 16 | SHIM | AIPC 78-11-11-80-186 |
| 16 | SHIM | AIPC 78-11-11-80-190 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 26-12-17-400-010-A | Installation of the Core Fire Detectors |
| TASK 70-23-11-911-013-A | General Torque Tightening Techniques |
| TASK 70-23-13-911-010-A | Procedures for the Installation of Preformed Packings |
| TASK 71-13-00-010-010-A | Opening of the Fan Cowls 437AL(447AL),438AR(448AR) |
| TASK 71-13-00-410-010-A | Closing of the Fan Cowls 437AL(447AL),438AR(448AR) |
| TASK 78-30-00-040-012-A | Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance |
| TASK 78-30-00-440-012-A | Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance |
| TASK 78-30-00-820-010-A | Rigging of the Thrust Reverser System |
| TASK 78-32-00-010-010-A | Opening of the Thrust Reverser Halves |
| TASK 78-32-00-410-010-A | Closing of the Thrust Reverser Halves |
Common Nozzle Assembly (CNA)Subtask 78-11-11-860-051-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 2M (6 FT) - ADJUSTABLE is in position.
Subtask 78-11-11-010-062-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 2M (6 FT) - ADJUSTABLE is in position.
B. Get Access
(1) Make sure that the fan cowls are open: (Ref. AMM TASK 71-13-00-010-010)
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
(2) Make sure that the thrust reverser doors are open: (Ref. AMM TASK 78-32-00-010-010)
(a) FOR [1000EM1] (ENGINE-1)
451AL, 452AR.
(b) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.
Subtask 78-11-11-040-054-A ** ON A/C NOT FOR ALL (1) Make sure that the fan cowls are open: (Ref. AMM TASK 71-13-00-010-010)
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
(2) Make sure that the thrust reverser doors are open: (Ref. AMM TASK 78-32-00-010-010)
(a) FOR [1000EM1] (ENGINE-1)
451AL, 452AR.
(b) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.
C. Make sure that the thrust reverser Hydraulic Control Unit (HCU) is deactivated (Ref. AMM TASK 78-30-00-040-012).
4. ProcedureSubtask 78-11-11-420-051-B ** ON A/C NOT FOR ALL
A. Installation of the Common Nozzle Assembly (CNA)
(1) Lift the IAE1N20001 FIXTURE-COMMON NOZZLE ASSEMBLY (2), with the CNA (1), from the IAE1N20004 DOLLY-COMMON NOZZLE ASSEMBLY (3), with an applicable lifting device.
(3) Make sure that the CNA does not touch the engine exhaust cone (6).
(4) Align the upper strut recess of the CNA (1) with the engine pylon.
(5) Keep the distance between the pylon and the CNA (1) at 0.75 in. (19 mm).
(6) Apply anti-seize compound (Material No.V10-094) to the threads of the bolts (5).
(7) Attach the CNA (1) to the engine flange with the bolts (5) and the washers (4).
(8) Do not fully torque the bolts (5) until they are all installed.
Subtask 78-11-11-080-052-A ** ON A/C NOT FOR ALL (1) Lift the IAE1N20001 FIXTURE-COMMON NOZZLE ASSEMBLY (2), with the CNA (1), from the IAE1N20004 DOLLY-COMMON NOZZLE ASSEMBLY (3), with an applicable lifting device.
NOTE: You can use equivalent tools.
(2) Carefully move the IAE1N20001 FIXTURE-COMMON NOZZLE ASSEMBLY, with the CNA (1), to the rear of the engine. (3) Make sure that the CNA does not touch the engine exhaust cone (6).
(4) Align the upper strut recess of the CNA (1) with the engine pylon.
(5) Keep the distance between the pylon and the CNA (1) at 0.75 in. (19 mm).
(6) Apply anti-seize compound (Material No.V10-094) to the threads of the bolts (5).
(7) Attach the CNA (1) to the engine flange with the bolts (5) and the washers (4).
(8) Do not fully torque the bolts (5) until they are all installed.
B. Remove the support equipment
(1) Remove the common nozzle fixture (2), IAE1N20001 FIXTURE-COMMON NOZZLE ASSEMBLY, from the CNA (1).
(2) Lower the common nozzle fixture (2), IAE1N20001 FIXTURE-COMMON NOZZLE ASSEMBLY, on to the common nozzle dolly (3), IAE1N20004 DOLLY-COMMON NOZZLE ASSEMBLY.
Subtask 78-11-11-420-052-B ** ON A/C NOT FOR ALL (1) Remove the common nozzle fixture (2), IAE1N20001 FIXTURE-COMMON NOZZLE ASSEMBLY, from the CNA (1).
(2) Lower the common nozzle fixture (2), IAE1N20001 FIXTURE-COMMON NOZZLE ASSEMBLY, on to the common nozzle dolly (3), IAE1N20004 DOLLY-COMMON NOZZLE ASSEMBLY.
C. Torque the bolts
(1) Begin at the 3 o'clock and 9 o'clock positions and torque the bolts (5) in opposite pairs in a clockwise sequence.
(2) TORQUE the bolts (5) to between 160 and 150 lbf.in (1.81 and 1.70 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
Subtask 78-11-11-420-053-A ** ON A/C NOT FOR ALL (1) Begin at the 3 o'clock and 9 o'clock positions and torque the bolts (5) in opposite pairs in a clockwise sequence.
(2) TORQUE the bolts (5) to between 160 and 150 lbf.in (1.81 and 1.70 m.daN )
(Ref. AMM TASK 70-23-11-911-013). D. Install the lower segment of the Air Cooling Air Cooled (ACAC) exhaust duct
(1) Put the lower segment (32) into position on the CNA (1).
(2) Install the four bolts (30) that attach the housing (31) to the CNA (1). Do not fully torque the bolts at this step.
(3) Install the coupling (35) and the AIPC 75-22-41-80-030 SEAL (34) (Ref. AMM TASK 70-23-13-911-010) that attach the ACAC exhaust duct lower segment (32) to the upper segment (33).
(4) Make sure that the ACAC exhaust duct is correctly aligned and that there is no load on it.
(5) TORQUE the four bolts (30) to between 70 and 50 lbf.in (0.79 and 0.57 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
(6) TORQUE the coupling (35) .
(a) TORQUE the coupling (35) to the value shown on the coupling band (Ref. AMM TASK 70-23-11-911-013).
(b) Tap the coupling circumference with MALLET - PLASTIC as you TORQUE the coupling nut.
Subtask 78-11-11-420-054-A ** ON A/C NOT FOR ALL Subtask 78-11-11-820-050-A ** ON A/C NOT FOR ALL (1) Put the lower segment (32) into position on the CNA (1).
(2) Install the four bolts (30) that attach the housing (31) to the CNA (1). Do not fully torque the bolts at this step.
(3) Install the coupling (35) and the AIPC 75-22-41-80-030 SEAL (34) (Ref. AMM TASK 70-23-13-911-010) that attach the ACAC exhaust duct lower segment (32) to the upper segment (33).
(4) Make sure that the ACAC exhaust duct is correctly aligned and that there is no load on it.
(5) TORQUE the four bolts (30) to between 70 and 50 lbf.in (0.79 and 0.57 m.daN )
(Ref. AMM TASK 70-23-11-911-013). (6) TORQUE the coupling (35) .
(a) TORQUE the coupling (35) to the value shown on the coupling band (Ref. AMM TASK 70-23-11-911-013).
(b) Tap the coupling circumference with MALLET - PLASTIC as you TORQUE the coupling nut.
F. Do a check of the gaps between the Bottom Loadshare Fitting (17) of the Thrust Reverser Halves and the CNA loadshare fitting (15)
(1) Remove the nuts (18), screws (19) and shims (16) from the CNA loadshare fitting (15).
(2) Apply putty around the CNA loadshare fitting (15).
(3) Close the thrust reverser halves and make sure that the translating sleeves are fully stowed (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL, 452AR.
(b) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.
(4) Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL, 452AR.
(b) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.
(5) Measure the thickness of the compressed putty on the CNA loadshare fitting (15). The thickness of the putty shows the gaps.
(6) Remove the putty.
(7) Add shims (16) to the upper surfaces of the loadshare fitting (15) to get a gap of 0.00 in. (0.00 mm).
(8) Add shims (16) on the lower surfaces of the loadshare fitting (15) to get a gap of between 0.002 in. (0.05 mm) and 0.040 in. (1.02 mm).
PRE SB 78-0242
(9) Install the shims (16), screws (19) and nuts (18) on the loadshare fitting (15).
END OF PRE SB 78-0242
POST SB 78-0242
(10) Assemble a replacement shim pack:
1 Use the thickest AIPC 78-11-11-80-178 SHIM (16) or AIPC 78-11-11-80-180 SHIM (16) or AIPC 78-11-11-80-182 SHIM (16) or AIPC 78-11-11-80-184 SHIM (16) or AIPC 78-11-11-80-186 SHIM (16) available without exceeding the thickness measured in steps 7 and 8 and without exceeding 0.362 in. (9.19 mm).
2 It is permitted to use more than one solid AIPC 78-11-11-80-178 SHIM (16) or AIPC 78-11-11-80-180 SHIM (16) or AIPC 78-11-11-80-182 SHIM (16) or AIPC 78-11-11-80-184 SHIM (16) or AIPC 78-11-11-80-186 SHIM (16) in order to minimize the amount of laminated shim required.
3 Use laminated shims to make up the difference between the thickness of the solid shims and the thickness measured in steps F.(7) and F.(8) or 0.362 in. (9.19 mm), whichever is smaller.
END OF POST SB 78-0242
(11) Do a check of the steps and gaps between the thrust reverser inner duct halves and the CNA and between the translating sleeves and the CNA (Ref. AMM TASK 78-30-00-820-010).
5. Close-up(1) Remove the nuts (18), screws (19) and shims (16) from the CNA loadshare fitting (15).
(2) Apply putty around the CNA loadshare fitting (15).
(3) Close the thrust reverser halves and make sure that the translating sleeves are fully stowed (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL, 452AR.
(b) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.
(4) Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL, 452AR.
(b) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.
(5) Measure the thickness of the compressed putty on the CNA loadshare fitting (15). The thickness of the putty shows the gaps.
(6) Remove the putty.
(7) Add shims (16) to the upper surfaces of the loadshare fitting (15) to get a gap of 0.00 in. (0.00 mm).
(8) Add shims (16) on the lower surfaces of the loadshare fitting (15) to get a gap of between 0.002 in. (0.05 mm) and 0.040 in. (1.02 mm).
PRE SB 78-0242
(9) Install the shims (16), screws (19) and nuts (18) on the loadshare fitting (15).
END OF PRE SB 78-0242
POST SB 78-0242
(10) Assemble a replacement shim pack:
CAUTION:
THE MAXIMUM SHIM THICKNESS MAY NOT EXCEED 0.362 IN (9.19 MM) IN ANY LOCATION.
(a) Assemble a replacement shim pack of equal thickness using solid AIPC 78-11-11-80-178 SHIM (16) or AIPC 78-11-11-80-180 SHIM (16) or AIPC 78-11-11-80-182 SHIM (16) or AIPC 78-11-11-80-184 SHIM (16) or AIPC 78-11-11-80-186 SHIM (16) and make up to required thickness by using peelable AIPC 78-11-11-80-190 SHIM (16). Install the new shim pack (16), the screws (19) and the nuts (18) on the load share fitting (15): 1 Use the thickest AIPC 78-11-11-80-178 SHIM (16) or AIPC 78-11-11-80-180 SHIM (16) or AIPC 78-11-11-80-182 SHIM (16) or AIPC 78-11-11-80-184 SHIM (16) or AIPC 78-11-11-80-186 SHIM (16) available without exceeding the thickness measured in steps 7 and 8 and without exceeding 0.362 in. (9.19 mm).
2 It is permitted to use more than one solid AIPC 78-11-11-80-178 SHIM (16) or AIPC 78-11-11-80-180 SHIM (16) or AIPC 78-11-11-80-182 SHIM (16) or AIPC 78-11-11-80-184 SHIM (16) or AIPC 78-11-11-80-186 SHIM (16) in order to minimize the amount of laminated shim required.
3 Use laminated shims to make up the difference between the thickness of the solid shims and the thickness measured in steps F.(7) and F.(8) or 0.362 in. (9.19 mm), whichever is smaller.
END OF POST SB 78-0242
(11) Do a check of the steps and gaps between the thrust reverser inner duct halves and the CNA and between the translating sleeves and the CNA (Ref. AMM TASK 78-30-00-820-010).
Subtask 78-11-11-410-053-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 halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL, 452AR.
(b) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.
Subtask 78-11-11-440-052-A ** ON A/C NOT FOR ALL Subtask 78-11-11-410-056-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL, 452AR.
(b) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.