DOC AIRBUS | AMM A320FInstallation of the Fan Rotor Blades [CFMB]
TASK 72-21-00-400-007-A
Installation of the Fan Rotor Blades
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 72-21-00-860-056-A ** ON A/C NOT FOR ALL
Subtask 72-21-00-420-068-A ** ON A/C NOT FOR ALL
Subtask 72-21-00-869-064-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 12:59:41 UTC
Installation of the Fan Rotor Blades
CAUTION:
ALL FAN ROTOR BLADES SHALL BE MATCHMARKED OR NUMBERED FOR ASSEMBLY IN ORIGINAL ALIGNMENT AND POSITION USING ONLY APPROVED MARKING MATERIAL.
CAUTION:
DO NOT DISSOCIATE FAN BLADE PAIRS MATCHED DURING ORIGINAL ASSEMBLY. BLADES FROM A SAME PAIR MUST ALWAYS BE LOCATED 180 DEGREES APART.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 1M(3 FT) |
| No specific | 1 | MAT - PROTECTIVE |
| No specific | AR | WARNING NOTICE(S) |
| 856A2631 | 1 | STAND,STORAGE-FAN BLADES |
| 856A3770 | 1 | CFMI SOFTWARE FOR BLADE MAPPING |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| REFERENCE | DESIGNATION |
|---|---|
| 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 |
| TASK 72-21-00-400-005-A | Installation of the Spinner Front Cone |
| TASK 72-21-00-400-006-A | Installation of the Spinner Rear Cone |
Installation of the First Fan Blade at 6 O'clockSubtask 72-21-00-860-056-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
(2) 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.
(3) 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).
(4) Make sure that MAT - PROTECTIVE is in position.
4. Procedure(1) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
(2) 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.
(3) 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).
(4) Make sure that MAT - PROTECTIVE is in position.
Subtask 72-21-00-420-068-A ** ON A/C NOT FOR ALL
A. Preparation and Installation of the Fan Rotor Blades:
(2) Installation of the Fan Rotor Blades.
(a) Position the fan blade No. 1 correctly (leading edge forward) and engage it (dovetail lug first) in the fan disk slot No. 1 immediately below the offset hole in the fan disk bolt flange.
(b) Push the blade fully in position.
(c) Pull down the fan blade to engage the lug into the booster spool recess.
(d) Install the spacer (70) between the fan blade No. 1 and the disk. Push the spacer fully in position against the front flange of the booster spool.
(e) Continue counterclockwise, forward looking aft and use the same procedure as for fan blade No. 1 to install blades No. 2 through No. 34 in their related slots.
1 Fully engage blade No. 36 in its dovetail recess. Let its dovetail root touch the bottom of the recess. Do not install its spacer.
2 Carefully engage blade No. 35 in its dovetail recess and install its spacer (70).
3 Install the spacer (70) of blade No. 36.
(g) Make sure that all the blades and spacers are correctly installed.
(h) Install the spinner rear cone. (Ref. AMM TASK 72-21-00-400-006)
(i) Install the spinner front cone. (Ref. AMM TASK 72-21-00-400-005)
(j) Remove the rubber pad or foam material flooring from the inlet cowl.
5. Close-upNOTE: In case of complete blade set replacement, do a blade mapping with 856A3770 CFMI SOFTWARE FOR BLADE MAPPING. Refer to GSEM 18.
CAUTION:
THE FAN BLADES ARE KEPT IN NUMERICAL ORDER ON THE STORAGE STAND AND MUST BE INSTALLED ACCORDINGLY ON THE FAN DISK. BLADE No.1 IS INSTALLED IN FRONT OF THE OFFSET BOLT OF THE FAN DISK. NUMBERS ARE GIVEN COUNTERCLOCKWISE, FORWARD LOOKING AFT.
CAUTION:
AFTER A BLADE MAPPING USING CFMI SOFTWARE (856A3770P03), IF THE BLADE PAIR MOMENT WEIGHT DIFFERENCE IS ABOVE THE PAIR CRITERIA, ON CONDITION THAT THE FINAL BLADE SET IS WITHIN TOLERANCES, THE BLADE SET IS SERVICEABLE. FOR FUTURE REPLACEMENT OF BLADES, DO A CHECK OF THE PAIR CRITERIA AND, IF NECESSARY, DO A STATIC CORRECTION PROCEDURE.
(1) Preparation for Installation of Fan Rotor Blades. NOTE: Installation will be easier if the fan disk blade recess into which the blade is to be installed is placed at the 6 O'clock position.
(a) Get the fan blades (80) from 856A2631 STAND,STORAGE-FAN BLADES (856A2631G01). NOTE: Put the fan disk dovetail slot, where you want to install blade No. 1 at the 6 O'clock position. This will help with the installation of the blades on the fan disk.
(b) Do the relubrication of the fan blade spacers, dovetails, platforms, midspan shrouds and fan disk dovetail slots (Ref. AMM TASK 72-21-00-210-804). (2) Installation of the Fan Rotor Blades.
(a) Position the fan blade No. 1 correctly (leading edge forward) and engage it (dovetail lug first) in the fan disk slot No. 1 immediately below the offset hole in the fan disk bolt flange.
(b) Push the blade fully in position.
(c) Pull down the fan blade to engage the lug into the booster spool recess.
(d) Install the spacer (70) between the fan blade No. 1 and the disk. Push the spacer fully in position against the front flange of the booster spool.
(e) Continue counterclockwise, forward looking aft and use the same procedure as for fan blade No. 1 to install blades No. 2 through No. 34 in their related slots.
NOTE: The midspan shroud section of each blade will engage and mate with the related midspan shroud sections of the adjacent blades.
(f) Install the last two fan blades No. 35 and 36 at the 12 O'clock position, as follows: 1 Fully engage blade No. 36 in its dovetail recess. Let its dovetail root touch the bottom of the recess. Do not install its spacer.
2 Carefully engage blade No. 35 in its dovetail recess and install its spacer (70).
3 Install the spacer (70) of blade No. 36.
(g) Make sure that all the blades and spacers are correctly installed.
(h) Install the spinner rear cone. (Ref. AMM TASK 72-21-00-400-006)
(i) Install the spinner front cone. (Ref. AMM TASK 72-21-00-400-005)
(j) Remove the rubber pad or foam material flooring from the inlet cowl.
Subtask 72-21-00-869-064-A ** ON A/C NOT FOR ALL
A. Make sure that the work area is clean and clear of tools and other items.
Subtask 72-21-00-942-063-A ** ON A/C NOT FOR ALL B. Close Access
(1) Remove the WARNING NOTICE(S).
(2) Remove the MAT - PROTECTIVE from the inlet cowl.
(3) Remove the access platform(s).
(1) Remove the WARNING NOTICE(S).
(2) Remove the MAT - PROTECTIVE from the inlet cowl.
(3) Remove the access platform(s).