DOC AIRBUS | AMM A320FInspection/Check of the Stage 1 Booster Vane, Fan Disk, Fan Blades Spacers and Booster Spool [CFMB]
TASK 72-21-00-210-007-A
Inspection/Check of the Stage 1 Booster Vane, Fan Disk, Fan Blades Spacers and Booster Spool
1. Reason for the Job
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 72-21-00-941-081-A ** ON A/C NOT FOR ALL
Subtask 72-21-00-210-057-A ** ON A/C NOT FOR ALL
Subtask 72-21-00-210-063-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 12:59:35 UTC
Inspection/Check of the Stage 1 Booster Vane, Fan Disk, Fan Blades Spacers and Booster Spool
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 | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 72-00-00-200-025-A | Over-Serviceable-Limit Extensions |
| TASK 72-00-00-200-025-A-01 | Over-Serviceable-Limit Extensions |
| TASK 72-21-00-000-007-A | Removal of the Fan Rotor Blades |
| TASK 72-21-00-000-008-A | Removal of the Stage 1 Booster Vane Assembly |
| 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 72-21-00-320-004-A | Blending of the Stage 1 Booster Vane Assembly |
| TASK 72-21-00-400-007-A | Installation of the Fan Rotor Blades |
| TASK 72-21-00-400-008-A | Installation of the Stage 1 Booster Vane Assembly |
Inspection of Fan DiskSubtask 72-21-00-941-081-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the 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) to tell persons not to energize the FADEC 1(2).
Subtask 72-21-00-020-073-A ** ON A/C NOT FOR ALL 4. Procedure(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the 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) to tell persons not to energize the FADEC 1(2).
Subtask 72-21-00-210-057-A ** ON A/C NOT FOR ALL
A. Do this visual inspection:
5. Close-up| INSPECT/CHECK | MAXIMUM SERVICEABLE LIMITS | REMARKS |
|---|---|---|
| 1.Stage 1 booster vanes for: | | |
| A.Piece missing: | Maximum number 20 blades up to 0.25 in. (6.5 mm) axial, 0.73 in. (18.5 mm) radial on all airfoil surfaces, except top/bottom 0.4 in. (10 mm). | Refer to maximum serviceable limits (Ref. AMM TASK 72-00-00-200-025) |
| B.Broken vane: | Not serviceable | Replace stage 1 booster vane (Ref. AMM TASK 72-21-00-000-008) and (Ref. AMM TASK 72-21-00-400-008) |
| C.Disengagement from inner shroud: | Not serviceable | Replace stage 1 booster vane (Ref. AMM TASK 72-21-00-000-008) and (Ref. AMM TASK 72-21-00-400-008) |
| D.Cracks and tears: | In area C, any number, less than 0.25 in. (6.5 mm) radial, less than 0.08 in. (2 mm) axial. | Refer to maximum serviceable limits (Ref. AMM TASK 72-00-00-200-025) |
| E.Distortion of trailing edge and leading edge: | Any number, if the length L is not more than 0.709 in. (18 mm) and the maximum dimension X along the chord width is not more than 0.256 in. (6.5 mm) | Refer to maximum serviceable limits (Ref. AMM TASK 72-00-00-200-025) |
| F.Nicks, dents, scratches for areas A and B: | Any number, less than 0.09 in. (2.29 mm) in diameter protrusion. | Refer to maximum serviceable limits (Ref. AMM TASK 72-00-00-200-025) |
| G.Nicks, dents, scratches for area "C": | Any number, less than 0.197 in. (5 mm) in diameter protrusion acceptable, not through. | Refer to maximum serviceable limits (Ref. AMM TASK 72-00-00-200-025). |
| H.Nicks, dents, scratches on leading edge and trailing edge | Maximum axial length less than 0.08 in. (2 mm) in diameter protrusion acceptable, not through. | For L/E, repair the stage 1 booster vane (Ref. AMM TASK 72-21-00-320-004) Refer to maximum serviceable limits (Ref. AMM TASK 72-00-00-200-025) |
| J.Deposits and erosion: | Any amount. | Refer to maximum serviceable limits (Ref. AMM TASK 72-00-00-200-025) |
| K.Cracked inner shroud | Not serviceable. | Refer to maximum serviceable limits (Ref. AMM TASK 72-00-00-200-025). |
| L.Erosion of abradable lining on outer shroud | Any amount. | |
| M.Flaking of abradable lining on outer shroud | Any number, maximum surface affected less than 52.70 sq.in (340 cm2) for CFM56-5B/P & CFM56-5B/2P engines. Any number, maximum surface affected less than 15.50 sq.in (100 cm2) for CFM56-5B & CFM56-5B/3 engine. | |
| 2.Fan disk for: | | |
| A.Cracks | Not serviceable. | |
| B.Wear on dovetail slot pressure faces. | No limit, if less than 50 percent of area is damaged. If the maximum affected surface, even only on one side of one slot, is greater than or equal to 50%, any amount if less than 0.152 mm (0.0060 in.) deep. | See limit extensions (Ref. AMM TASK 72-00-00-200-025) |
| C.Nicks and scratches. | No limited quantity, if not deeper than 0.01 in. (0.25 mm) after removal of high metal. None permitted within 0.5 in. (12.7 mm) of dovetail slots disk bore and aft surface of web. | |
| D.Wear/ contact on aft post edge | Any amount | |
| 3.Fan blade spacer for: | | |
| A.Cracks | Not serviceable. | Replace blade spacer |
| B.Fretting | No limit, if the damage is not more than 0.005 in. (0.125 mm) deep. | Replace blade spacer |
| C.Corrosion, pitting | No limit for the damage less than 0.0098 in. (0.25 mm) deep, if the surface protection is not damaged. | Replace blade spacer |
| D.Damaged Surface protection | No limit for the damage less than 20 percent of total surface if parent material is found without corrosion pitting in the damaged area. | Replace blade spacer |
| E.Scratches | No limit for the damage 0.005 in. (0,125 mm) deep maximum after removal of high metal. | Replace blade spacer |
| 4.Booster spool for: | | |
| A.Wear on front flange | No limit if not deeper than 0.001 in. (0.0254 mm) for wear due to contact with the rear surface of the fan blade shank. | |
| B.Dents, nicks and scratches on front surface of seal tooth | Any amount if less than 0.003 in. (0.08 mm) deep. | |
| C.Plugs on surface A | A maximum of 8 plugs missing is permitted. | See limit extensions (Ref. AMM TASK 72-00-00-200-025) |
Subtask 72-21-00-210-063-A ** ON A/C NOT FOR ALL
A. Before fan blade installation, 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).
Subtask 72-21-00-420-077-A ** ON A/C NOT FOR ALL Subtask 72-21-00-869-075-A ** ON A/C NOT FOR ALL C. Make sure that the work area is clean and clear of tools and other items.
Subtask 72-21-00-942-073-A ** ON A/C NOT FOR ALL D. Remove the WARNING NOTICE(S).