DOC AIRBUS | AMM A320FVisual Inspection of the Fan Frame Strut 7 Oil Leakage [CFMB]
TASK 72-23-00-210-802-A
Visual Inspection of the Fan Frame Strut 7 Oil Leakage
1. Reason for the Job
Self explanatory
2. Job Set-up Information
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 72-23-00-941-109-A ** ON A/C NOT FOR ALL
Subtask 72-23-00-210-070-A ** ON A/C NOT FOR ALL
Subtask 72-23-00-410-133-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:41:57 UTC
Visual Inspection of the Fan Frame Strut 7 Oil Leakage
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP1039) | acetone |
| (Material No.CP1041) | isopropyl alcohol |
| (Material No.CP2011) | stoddard solvent |
| (Material No.CP2101) | graphite grease |
| (Material No.CP5070) | vaseline |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 120 | O-RING | AIPC 72-23-00-15-120 |
| 130 | O-RING | AIPC 72-23-00-15-130 |
| 170 | PACKING | AIPC 72-23-00-15-160 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-00-00-710-006-B | Minimum Idle Check |
| TASK 71-13-00-010-040-B | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-040-B | Closing of the Fan Cowl Doors |
| TASK 72-23-00-210-004-A | Visual Inspection of the Fan Frame Assembly |
| TASK 72-62-00-000-002-A | Removal of the Transfer Gearbox Module |
| TASK 72-62-00-400-002-A | Installation of the Transfer Gearbox Module |
| TASK 78-30-00-081-041-B | Make the Thrust Reverser Serviceable after Maintenance |
| TASK 78-30-00-481-041-B | Make the Thrust Reverser Unserviceable for Maintenance |
| TASK 78-36-00-010-040-B | Opening of the Thrust Reverser Doors |
| TASK 78-36-00-410-040-B | Closing of the Thrust Reverser Doors |
Fan Frame Strut 7Subtask 72-23-00-941-109-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 engine 1(2) shutdown occurred not less than five minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize the FADEC 1(2).
Subtask 72-23-00-010-140-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 engine 1(2) shutdown occurred not less than five minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize the FADEC 1(2).
B. Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Subtask 72-23-00-040-080-A ** ON A/C NOT FOR ALL Subtask 72-23-00-010-141-A ** ON A/C NOT FOR ALL (1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
D. Open the thrust reverser doors (Ref. AMM TASK 78-36-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
4. Procedure(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 72-23-00-210-070-A ** ON A/C NOT FOR ALL
A. Visual Inspection of the Fan Frame Strut 7 Oil Leakage
(1) Visually inspect for any oil traces:
(a) On the fan frame, aft acoustical panel and V-groove at 6 o'clock. See sheet 1 of the figure.
(b) On the Transfer Gearbox (TGB) area. See sheet 2 of the figure.
(2) Remove all the oil traces with isopropyl alcohol (Material No.CP1041) or stoddard solvent (Material No.CP2011) .
(3) Close the thrust reverser doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
(4) Do a minimum idle check (Ref. AMM TASK 71-00-00-710-006).
(5) Open the thrust reverser doors (Ref. AMM TASK 78-36-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
(6) Inspect for any oil traces on the cleaned areas.
(a) If no oil traces are found, operate 50 flight-cycles before doing a new visual inspection of the strut 7 (Ref. AMM TASK 72-23-00-210-004).
(b) If oil traces are found or suspected, do a special borescope inspection of the fan frame strut 7 vent hole using a BORESCOPE DIA 4 MM (0.16 IN)-FLEXIBLE, FRONT/SIDE VIEW.
1 Insert a BORESCOPE DIA 4 MM (0.16 IN)-FLEXIBLE, FRONT/SIDE VIEW in the fan frame strut 7 vent hole. See sheet 3 of the figure.
2 Route the BORESCOPE DIA 4 MM (0.16 IN)-FLEXIBLE, FRONT/SIDE VIEW upstream along the RDS outer housing to inspect for oil traces out of the RDS outer housing centering surface. See sheet 4 and sheet 5 of the figure.
(c) If no oil traces at diameter WA or along RDS outer housing are found during borescope inspection. See sheet 5 of the figure.
1 Remove the TGB (Ref. AMM TASK 72-62-00-000-002).
a Remove the bolts (110) and remove the oil scavenge tube (140).
b Remove and inspect the O-ring (120) and O-ring (130) from the oil scavenge tube.
d Engage the oil scavenge tube assembly in the forward bore at 6 o'clock position between flanges G and A2.
e Safety the tube with bolts (110), threads lightly coated with graphite grease (Material No.CP2101) .
f TORQUE the bolts (110) to between 120 and 110 lbf.in (1.36 and 1.24 m.daN )
.
a Remove the four bolts (160).
b Remove the RDS outer housing (180) from the fan frame.
d Inspect the RDS outer housing for traces of circular wear/fretting.
4 If no finding other than the outer housing O-rings (170) damage, install the RDS outer housing as follows:
a Degrease the RDS outer housing (180) with acetone (Material No.CP1039) .
b Lightly coat two new AIPC 72-23-00-15-160 PACKING (170) with vaseline (Material No.CP5070) .
c Install the two new AIPC 72-23-00-15-160 PACKING (170) in the external grooves of large diameter of RDS outer housing (180).
d Slide the RDS outer housing (180) onto the fan frame rabbet diameter.
f Secure RDC outer housing (180) with the four bolts (160).
g TORQUE the bolts (160) to between 120 and 110 lbf.in (1.36 and 1.24 m.daN ).
h Make sure that the RDS outer race is clean.
5 Install the TGB (Ref. AMM TASK 72-62-00-400-002).
(a) Clean the oil traces with isopropyl alcohol (Material No.CP1041) or stoddard solvent (Material No.CP2011) .
(b) Close the thrust reverser doors (Ref. AMM TASK 78-36-00-410-040).
1 FOR [1000EM1] (ENGINE-1)
451AL 452AR
2 FOR [1000EM2] (ENGINE-2)
461AL 462AR
(c) Do a minimum idle check (Ref. AMM TASK 71-00-00-710-006).
(d) Open the thrust reverser doors (Ref. AMM TASK 78-36-00-010-040).
1 FOR [1000EM1] (ENGINE-1)
451AL 452AR
2 FOR [1000EM2] (ENGINE-2)
461AL 462AR
(e) Inspect for traces of oil on the cleaned areas:
1 If no oil traces found, do a new visual inspection of strut 7 after 50 flight-cycles (Ref. AMM TASK 72-23-00-210-004).
2 If oil traces are found or suspected, remove the engine for investigation after 1 flight-cycle.
5. Close-up(1) Visually inspect for any oil traces:
(a) On the fan frame, aft acoustical panel and V-groove at 6 o'clock. See sheet 1 of the figure.
(b) On the Transfer Gearbox (TGB) area. See sheet 2 of the figure.
(2) Remove all the oil traces with isopropyl alcohol (Material No.CP1041) or stoddard solvent (Material No.CP2011) .
(3) Close the thrust reverser doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
(4) Do a minimum idle check (Ref. AMM TASK 71-00-00-710-006).
(5) Open the thrust reverser doors (Ref. AMM TASK 78-36-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
(6) Inspect for any oil traces on the cleaned areas.
(a) If no oil traces are found, operate 50 flight-cycles before doing a new visual inspection of the strut 7 (Ref. AMM TASK 72-23-00-210-004).
(b) If oil traces are found or suspected, do a special borescope inspection of the fan frame strut 7 vent hole using a BORESCOPE DIA 4 MM (0.16 IN)-FLEXIBLE, FRONT/SIDE VIEW.
1 Insert a BORESCOPE DIA 4 MM (0.16 IN)-FLEXIBLE, FRONT/SIDE VIEW in the fan frame strut 7 vent hole. See sheet 3 of the figure.
2 Route the BORESCOPE DIA 4 MM (0.16 IN)-FLEXIBLE, FRONT/SIDE VIEW upstream along the RDS outer housing to inspect for oil traces out of the RDS outer housing centering surface. See sheet 4 and sheet 5 of the figure.
NOTE: Some grease from production can remain at the bottom of the fan frame strut 7 inner cavity. This is not due to an oil leakage. If no oil traces are visible at diameter WA and along RDS outer housing, liquid at the bottom of the strut 7 inner cavity is acceptable.
a If oil traces are confirmed at diameter WA/along RDS outer housing, remove the engine for investigation after one flight-cycle. (c) If no oil traces at diameter WA or along RDS outer housing are found during borescope inspection. See sheet 5 of the figure.
1 Remove the TGB (Ref. AMM TASK 72-62-00-000-002).
NOTE: The removal of the TGB includes the RDS removal.
2 Remove and inspect the oil scavenge tube as follows. See sheet 6 of the figure. a Remove the bolts (110) and remove the oil scavenge tube (140).
b Remove and inspect the O-ring (120) and O-ring (130) from the oil scavenge tube.
- If O-rings are found damaged, continue directly to step 4.A.(7) after replacing the O-ring (120) and installing the oil scavenge tube (140) as follows.
d Engage the oil scavenge tube assembly in the forward bore at 6 o'clock position between flanges G and A2.
e Safety the tube with bolts (110), threads lightly coated with graphite grease (Material No.CP2101) .
f TORQUE the bolts (110) to between 120 and 110 lbf.in (1.36 and 1.24 m.daN )
. NOTE: The flange shape and bolt hole layout make the oil scavenge tube correctly aligns in relation to the fan frame.
3 Remove and inspect the RDS outer housing as follows: a Remove the four bolts (160).
b Remove the RDS outer housing (180) from the fan frame.
- If the RDS inner housing goes down during removal, remove the engine for investigation.
d Inspect the RDS outer housing for traces of circular wear/fretting.
- If circular wear is found, remove the engine for investigation.
- If circular wear is found, remove the engine for investigation.
4 If no finding other than the outer housing O-rings (170) damage, install the RDS outer housing as follows:
a Degrease the RDS outer housing (180) with acetone (Material No.CP1039) .
b Lightly coat two new AIPC 72-23-00-15-160 PACKING (170) with vaseline (Material No.CP5070) .
c Install the two new AIPC 72-23-00-15-160 PACKING (170) in the external grooves of large diameter of RDS outer housing (180).
d Slide the RDS outer housing (180) onto the fan frame rabbet diameter.
NOTE: The RDS outer housing flange must be seated against the fan frame boss.
e Lightly coat the threads of the four bolts (160) with graphite grease (Material No.CP2101) . f Secure RDC outer housing (180) with the four bolts (160).
g TORQUE the bolts (160) to between 120 and 110 lbf.in (1.36 and 1.24 m.daN )
. h Make sure that the RDS outer race is clean.
5 Install the TGB (Ref. AMM TASK 72-62-00-400-002).
NOTE: The installation of the TGB includes the RDS installation.
(7) If there are no findings since step 4.A.(6)(b)2, do the following procedure: (a) Clean the oil traces with isopropyl alcohol (Material No.CP1041) or stoddard solvent (Material No.CP2011) .
(b) Close the thrust reverser doors (Ref. AMM TASK 78-36-00-410-040).
1 FOR [1000EM1] (ENGINE-1)
451AL 452AR
2 FOR [1000EM2] (ENGINE-2)
461AL 462AR
(c) Do a minimum idle check (Ref. AMM TASK 71-00-00-710-006).
(d) Open the thrust reverser doors (Ref. AMM TASK 78-36-00-010-040).
1 FOR [1000EM1] (ENGINE-1)
451AL 452AR
2 FOR [1000EM2] (ENGINE-2)
461AL 462AR
(e) Inspect for traces of oil on the cleaned areas:
1 If no oil traces found, do a new visual inspection of strut 7 after 50 flight-cycles (Ref. AMM TASK 72-23-00-210-004).
2 If oil traces are found or suspected, remove the engine for investigation after 1 flight-cycle.
Subtask 72-23-00-410-133-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 doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 72-23-00-440-074-A ** ON A/C NOT FOR ALL Subtask 72-23-00-410-134-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 doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR