DOC AIRBUS | AMM A320FDetailed Inspection and Relubrication of the Fan Blade Dovetails, Midspan Shrouds, Spacers, Platforms and Fan Disk Dovetail Slots [CFMB]
TASK 72-21-00-210-804-A
Detailed Inspection and Relubrication of the Fan Blade Dovetails, Midspan Shrouds, Spacers, Platforms and Fan Disk Dovetail Slots
Refer to the MPD TASK: 722000-C3
DETAILED INSPECTION AND RELUBRICATION OF FAN BLADE DOVETAILS, MIDSPAN SHROUDS, SPACERS, PLATFORMS AND FAN DISK DOVETAIL SLOTS.
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 72-21-00-941-097-A ** ON A/C NOT FOR ALL
Subtask 72-21-00-210-071-A ** ON A/C NOT FOR ALL
Subtask 72-21-00-640-054-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 12:59:40 UTC
Detailed Inspection and Relubrication of the Fan Blade Dovetails, Midspan Shrouds, Spacers, Platforms and Fan Disk Dovetail Slots
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
ZONE: 400
1. Reason for the JobRefer to the MPD TASK: 722000-C3
DETAILED INSPECTION AND RELUBRICATION OF FAN BLADE DOVETAILS, MIDSPAN SHROUDS, SPACERS, PLATFORMS AND FAN DISK DOVETAIL SLOTS.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | BRUSH - BRISTLED, SOFT |
| No specific | AR | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP1039) | acetone |
| (Material No.CP1041) | isopropyl alcohol |
| (Material No.CP2011) | stoddard solvent |
| (Material No.CP2171) | Molykote U-n |
| (Material No.CP2470) | TURCO 5948 DPM |
| (Material No.CP2559) | ardrox 552 |
| (Material No.CP2560) | turco ind 79 |
| (Material No.CP2566) | mag-chem teksol |
| (Material No.CP2584) | degreasol 99 R |
| (Material No.CP2656) | mag-chem skysol |
| (Material No.CP5062) | MoS_2 dry film lubricant |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 72-21-00-000-007-A | Removal of the Fan Rotor Blades |
| TASK 72-21-00-210-006-A | Inspection of the Fan Rotor Blades Removed from the Fan Disk |
| TASK 72-21-00-210-007-A | Inspection/Check of the Stage 1 Booster Vane, Fan Disk, Fan Blades Spacers and Booster Spool |
| TASK 72-21-00-400-007-A | Installation of the Fan Rotor Blades |
| TASK 72-23-00-280-006-A | Inspection of Mid Acoustical Panels |
Fan Blade, Blade Spacer and Disk Areas to Be Inspected after Cleaning for Removal of Lubricant from Pressure FacesSubtask 72-21-00-941-097-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Put a WARNING NOTICE(S) in position to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than five minutes before you do this procedure.
(3) On 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) in position to tell persons not to energize FADEC 1(2).
Subtask 72-21-00-020-081-A ** ON A/C NOT FOR ALL Subtask 72-21-00-110-058-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on ENG panel 115VU:
(a) Put a WARNING NOTICE(S) in position to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than five minutes before you do this procedure.
(3) On 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) in position to tell persons not to energize FADEC 1(2).
C. Clean the fan blade dovetails.
(1) Clean the fan blade dovetails and midspan shrouds, the fan blade spacers and the fan disk dovetail slots with the isopropyl alcohol (Material No.CP1041) or acetone (Material No.CP1039) or stoddard solvent (Material No.CP2011) or TURCO 5948 DPM (Material No.CP2470) or ardrox 552 (Material No.CP2559) or turco ind 79 (Material No.CP2560) or mag-chem teksol (Material No.CP2566) or degreasol 99 R (Material No.CP2584) or mag-chem skysol (Material No.CP2656) . Use a BRUSH - BRISTLED, SOFT if necessary, to remove the dirt build-ups.
4. Procedure(1) Clean the fan blade dovetails and midspan shrouds, the fan blade spacers and the fan disk dovetail slots with the isopropyl alcohol (Material No.CP1041) or acetone (Material No.CP1039) or stoddard solvent (Material No.CP2011) or TURCO 5948 DPM (Material No.CP2470) or ardrox 552 (Material No.CP2559) or turco ind 79 (Material No.CP2560) or mag-chem teksol (Material No.CP2566) or degreasol 99 R (Material No.CP2584) or mag-chem skysol (Material No.CP2656) . Use a BRUSH - BRISTLED, SOFT if necessary, to remove the dirt build-ups.
Subtask 72-21-00-210-071-A ** ON A/C NOT FOR ALL
A. Do an inspection/check of the items that follow:
(1) The fan blade airfoils, the midspan shrouds and the dovetails (Ref. AMM TASK 72-21-00-210-006).
(2) The fan blade spacers and the fan dovetail slots (Ref. AMM TASK 72-21-00-210-007).
Subtask 72-21-00-210-072-A ** ON A/C NOT FOR ALL (1) The fan blade airfoils, the midspan shrouds and the dovetails (Ref. AMM TASK 72-21-00-210-006).
(2) The fan blade spacers and the fan dovetail slots (Ref. AMM TASK 72-21-00-210-007).
B. Do a tap test inspection for the mid acoustical panel delamination (Ref. AMM TASK 72-23-00-280-006).
5. Close-upSubtask 72-21-00-640-054-A ** ON A/C NOT FOR ALL
A. Apply the MoS_2 dry film lubricant (Material No.CP5062) or the Molykote U-n (Material No.CP2171) to:
Subtask 72-21-00-420-092-A ** ON A/C NOT FOR ALL Subtask 72-21-00-942-083-A ** ON A/C NOT FOR ALL - The fan disk dovetail slots
- The blade spacers
- The blade dovetails
- The blade platforms and the lateral, rear and forward surfaces of these platforms
- The blade midspan shrouds.
NOTE: Before the re-installation of the blades, you must apply a large quantity of lubricant to all the dovetail and the slot pressure faces. Brush application is preferred. If you use spray application, a minimum of four to six passes is necessary to supply all the pressure faces with sufficient lubrication. Let the lubricant become dry to a dull opaque finish before you install the blades in the disk slots.
C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the WARNING NOTICE(S).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the WARNING NOTICE(S).