DOC AIRBUS | AMM A320FSpecial Detailed Inspection (HFEC) of Pylon, Forward Lateral Spars, Lower Radius Forward of RIB 1
TASK 54-51-00-250-806-A
Special Detailed Inspection (HFEC) of Pylon, Forward Lateral Spars, Lower Radius Forward of RIB 1
Refer to the MPD TASK: 545305-01
SPECIAL DETAILED INSPECTION (HFEC) OF PYLON, FORWARD LATERAL SPARS, LOWER RADIUS FORWARD OF RIB 1.
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 54-51-00-941-118-A
Subtask 54-51-00-250-059-A
Subtask 54-51-00-390-057-A
[Rev.10 from 2021]
2026.04.01 02:00:20 UTC
Special Detailed Inspection (HFEC) of Pylon, Forward Lateral Spars, Lower Radius Forward of RIB 1
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.
WARNING:
PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:
- THE FLIGHT CONTROLS
- THE FLIGHT CONTROL SURFACES
- THE LANDING GEAR AND THE RELATED DOORS
- COMPONENTS THAT MOVE.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
CAUTION:
DO NOT APPLY TEMPORARY PROTECTION SYSTEM (TPS) ON THE INSPECTION AREA. IF YOU APPLY TPS ON THE INSPECTION AREA, YOU CAN CAUSE DAMAGE TO THE AIRCRAFT.
1. Reason for the JobRefer to the MPD TASK: 545305-01
SPECIAL DETAILED INSPECTION (HFEC) OF PYLON, FORWARD LATERAL SPARS, LOWER RADIUS FORWARD OF RIB 1.
NOTE: The effectivity of this task is "ALL". To know if this task is applicable to your aircraft, refer to the MPD task applicability.
The information on weight variant groups is given in the MPD and SRM introductions.
2. Job Set-up InformationThe information on weight variant groups is given in the MPD and SRM introductions.
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE |
| No specific | AR | FLASHLIGHT |
| No specific | AR | MIRROR - INSPECTION |
| No specific | AR | PLUG - BLANKING |
| No specific | AR | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.08BAA9) | Non Aqueous Cleaner-General - - |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 415 | LOWER PYLON |
| 425 | LOWER PYLON |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 36-11-49-000-830-A | Removal of the Pylon Bleed Duct Assembly |
| TASK 36-11-49-400-830-A | Installation of the Pylon Bleed Duct Assembly |
| TASK 51-78-00-916-001-A | Application of Temporary Protection System (TPS) |
| 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 78-30-00-040-807-A | Deactivation of the Thrust Reverser System for Nacelle Maintenance (ICU) |
| TASK 78-30-00-440-807-A | Reactivation of the Thrust Reverser System after Nacelle Maintenance (ICU) |
| 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 |
| SRM 512300 | |
| SRM 512400 | |
| NTM 545305 | |
| SRM 511100 | (for corrective action) |
| SRM 512200 | (for corrective action) |
Engine Fire-Extinguishing PipeSubtask 54-51-00-941-118-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 and 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 54-51-00-040-115-A (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 and 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).
B. Deactivation of the Thrust Reverser
Subtask 54-51-00-010-125-A WARNING:
MAKE SURE THAT THE THRUST REVERSER IS LOCKED. IF NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE INJURY TO PERSONNEL AND/OR DAMAGE TO THE REVERSER.
(1) Make the thrust reverser unserviceable for maintenance (Ref. AMM TASK 78-30-00-040-807). C. 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.
(2) Open the thrust reverser 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.
(3) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position:
(a) For the left pylon, in zone 415
(b) For the right pylon, in zone 425.
Subtask 54-51-00-020-095-A (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.
(2) Open the thrust reverser 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.
(3) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position:
(a) For the left pylon, in zone 415
(b) For the right pylon, in zone 425.
D. Removal of the Components
(1) Remove the pylon bleed-duct assembly (Ref. AMM TASK 36-11-49-000-830).
(2) Remove the engine fire-extinguishing pipe (4) between RIB1 and RIB4 from its connection. To do this:
(a) Loosen the nut (3).
(b) Disconnect the engine fire-extinguishing pipe (4) from its connection.
(c) Remove the bolts (6) and the washers (5).
(d) Remove the engine fire-extinguishing pipe (4) with its clamps (7).
(e) Put the PLUG - BLANKING on the disconnected pipe end.
(3) Remove the bracket (8) that is installed on the pylon box. To do this:
(a) Hold the bracket (8) that is installed on the pylon box.
(b) Remove the bolts (1) and the washers (2).
(c) Remove the bracket (8) from the pylon box.
Subtask 54-51-00-110-116-A (1) Remove the pylon bleed-duct assembly (Ref. AMM TASK 36-11-49-000-830).
(2) Remove the engine fire-extinguishing pipe (4) between RIB1 and RIB4 from its connection. To do this:
(a) Loosen the nut (3).
(b) Disconnect the engine fire-extinguishing pipe (4) from its connection.
(c) Remove the bolts (6) and the washers (5).
(d) Remove the engine fire-extinguishing pipe (4) with its clamps (7).
(e) Put the PLUG - BLANKING on the disconnected pipe end.
(3) Remove the bracket (8) that is installed on the pylon box. To do this:
(a) Hold the bracket (8) that is installed on the pylon box.
(b) Remove the bolts (1) and the washers (2).
(c) Remove the bracket (8) from the pylon box.
E. Preparation of the Inspection Area
(1) Remove the sealant and/or paint from the inspection area if this is necessary for the Non-destructive Testing Manual (NTM) task.
(2) Make sure that the inspection area is sufficiently clean to do a satisfactory inspection of the area.
(3) If it is not sufficiently clean, clean the inspection area with Non Aqueous Cleaner-General - - (Material No.08BAA9) and Textile-Lint free Cotton - (Material No.14SBA1) .
(4) Make sure that there is no (TPS) layer and if there is a TPS layer, remove it (Ref. AMM TASK 51-78-00-916-001).
(5) Use a FLASHLIGHT and a MIRROR - INSPECTION for the inspection, if necessary.
4. Procedure(1) Remove the sealant and/or paint from the inspection area if this is necessary for the Non-destructive Testing Manual (NTM) task.
(2) Make sure that the inspection area is sufficiently clean to do a satisfactory inspection of the area.
(3) If it is not sufficiently clean, clean the inspection area with Non Aqueous Cleaner-General - - (Material No.08BAA9) and Textile-Lint free Cotton - (Material No.14SBA1) .
(4) Make sure that there is no (TPS) layer and if there is a TPS layer, remove it (Ref. AMM TASK 51-78-00-916-001).
(5) Use a FLASHLIGHT and a MIRROR - INSPECTION for the inspection, if necessary.
Subtask 54-51-00-250-059-A
A. Inspection
(1) Do a special detailed inspection (HFEC) of the lower radius of the forward lateral spar of the pylon forward of RIB1 for damage or discontinuities. Refer to the Non-destructive Testing Manual ( NTM 545305) task.
(2) Make a report of the damage after the NTM inspection:
(a) Corrosion damage:
5. Close-up(1) Do a special detailed inspection (HFEC) of the lower radius of the forward lateral spar of the pylon forward of RIB1 for damage or discontinuities. Refer to the Non-destructive Testing Manual ( NTM 545305) task.
(2) Make a report of the damage after the NTM inspection:
(a) Corrosion damage:
- If you find corrosion damage, refer to the Structural Repair Manual ( SRM 512200) for the corrosion types, inspection, removal and subsequent corrosion protection.
- If you find this type of damage, refer to the Structural Repair Manual ( SRM 511100) for the damage types, classification and corrective action.
Subtask 54-51-00-390-057-A
A. Sealant or Paint Application
(1) If the NTM procedure asked to remove the sealant and/or paint from the inspection area, apply sealant (refer to SRM 512400) or paint (refer to SRM 512300) on the inspection area.
Subtask 54-51-00-420-094-A (1) If the NTM procedure asked to remove the sealant and/or paint from the inspection area, apply sealant (refer to SRM 512400) or paint (refer to SRM 512300) on the inspection area.
B. Installation of the Components
(1) Install the bracket (8) on the pylon box. To do this:
(a) Put and hold the bracket (8) in position on the pylon box.
(b) Install the washers (2) and the bolts (1).
(c) Tighten the bolts (1).
(2) Install the engine fire-extinguishing pipe (4) between RIB1 and RIB4 on its connection. To do this:
(a) Remove the PLUG - BLANKING from the disconnected pipe end.
(b) Make sure that the pipe is clean and in the correct condition.
(c) Put and hold the engine fire-extinguishing pipe (4) in the correct position.
(d) Make sure that the clamps (7) are in position.
(e) Install the washers (5) and the bolts (6).
(f) Tighten the bolts (6).
(g) Connect the engine fire-extinguishing pipe (4) to the applicable location.
(h) Tighten the nut (3).
(3) Install the pylon bleed-duct assembly (Ref. AMM TASK 36-11-49-400-830).
Subtask 54-51-00-410-134-A (1) Install the bracket (8) on the pylon box. To do this:
(a) Put and hold the bracket (8) in position on the pylon box.
(b) Install the washers (2) and the bolts (1).
(c) Tighten the bolts (1).
(2) Install the engine fire-extinguishing pipe (4) between RIB1 and RIB4 on its connection. To do this:
(a) Remove the PLUG - BLANKING from the disconnected pipe end.
(b) Make sure that the pipe is clean and in the correct condition.
(c) Put and hold the engine fire-extinguishing pipe (4) in the correct position.
(d) Make sure that the clamps (7) are in position.
(e) Install the washers (5) and the bolts (6).
(f) Tighten the bolts (6).
(g) Connect the engine fire-extinguishing pipe (4) to the applicable location.
(h) Tighten the nut (3).
(3) Install the pylon bleed-duct assembly (Ref. AMM TASK 36-11-49-400-830).
C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Close the thrust reverser 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.
(4) 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.
Subtask 54-51-00-440-114-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Close the thrust reverser 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.
(4) 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.
D. Reactivation of the Thrust Reverser
(1) Make the thrust reverser serviceable after maintenance (Ref. AMM TASK 78-30-00-440-807).
Subtask 54-51-00-942-093-A (1) Make the thrust reverser serviceable after maintenance (Ref. AMM TASK 78-30-00-440-807).
E. Aircraft Maintenance Configuration
(1) Remove the WARNING NOTICE(S).
(1) Remove the WARNING NOTICE(S).