DOC AIRBUS | AMM A320FGeneral Visual Inspection of Piping of LPT Case Air Cooling [CFMB]
TASK 72-54-00-210-003-B-01
General Visual Inspection of Piping of LPT Case Air Cooling
1. Reason for the Job
This task is applicable for /P, /3 and /3 PIP engines.
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 72-54-00-941-065-A ** ON A/C NOT FOR ALL
Subtask 72-54-00-210-057-A ** ON A/C NOT FOR ALL
Subtask 72-54-00-410-093-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:43:14 UTC
General Visual Inspection of Piping of LPT Case Air Cooling
1. Reason for the Job
This task is applicable for /P, /3 and /3 PIP engines.
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 |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-51-00-230-002-A | Fluorescent-Penetrant Inspection-Portable-Water Washable |
| 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 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 |
Subtask 72-54-00-941-065-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 72-54-00-010-090-A ** ON A/C NOT FOR ALL (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).
B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Subtask 72-54-00-040-065-A ** ON A/C NOT FOR ALL Subtask 72-54-00-010-091-A ** ON A/C NOT FOR ALL (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) 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 72-54-00-210-057-A ** ON A/C NOT FOR ALL
A. Inspect cooling air tubes and manifolds as follows:
5. Close-up| INSPECT/CHECK | MAXIMUM SERVICEABLE LIMITS | REMARKS |
|---|---|---|
1.Cooling air manifold for:  Visual Inspection of the Mounting Lugs (Only Applicable /P, /3 and /3 PIP Engines) ** ON A/C NOT FOR ALL | | |
| A.Cracks in the forward mounting lug | One crack on one forward mounting lug is permitted. | |
| B.Broken forward mounting lug | One breakage on one forward mounting lug is permitted if there is not crack or breakage on the two adjacent cooling air tube supports. | |
| | One breakage on one forward mounting lug of a forward lug is permitted according the two adjacent cooling air tube supports: are not broken or crack is no longer than 0.59 in. (15 mm) on the mounting lugs. | A continue in-service limit of 10 hours or 10 cycles is permitted if one adjacent cooling air tube support is broken. If one or two adjacent supports have a crack that is more than 0.59 in. (15 mm), check the part for crack evolution after 10 hours or 10 cycles -If no crack evolution: Check after 50 hours or 50 cycles following the first check, then check every 100 hours or 100 cycles -If crack evolution : A continue in-service limit of 30 hours or 30 cycles is permitted. |
| C.Dents | Any number if smooth contour and not deeper than 0.03 in. (0.76 mm). | |
| D.Nick, scratch and chafing (wear) on tube external surface. | Maximum finish depth after you make the defect smooth is 0.008 in. (0.20 mm). | Make the defect smooth by hand blending per Do a local fluorescent-penetrant inspection (Ref. AMM TASK 70-51-00-230-002). No crack is permitted. |
| 2.Cooling air manifold for: | | |
| A.Dent on sleeve | Any number if smooth contour and no deeper than 0.03 in. (0.76 mm). | |
| B.Dent on box | Any number and not deeper than 0.118 in. (3.0 mm). | Serviceable after blending out high metal and sharp edges. |
| C.Scratches or chafing on box | Any number and not deeper than 0.004 in. (0.1 mm). | |
| 3.The rear pin of cooling air manifold: | | |
| A.Breakage | Not serviceable. | |
| B.Distortion | Any amount after re-shaping. | Serviceable if, during installation, the rear support mounting lug slides freely into its housing. |
| C.Fretting | 0.020 in. (0.5 mm) deep over 120 degrees or 0.0098 in. (0.25 mm) on the whole periphery. | Whatever the amount of fretting found, replace the wire-mesh bushing. |
| D.Wear groove | 0.05 in. (1.27 mm) deep and 0.12 in. (3 mm) wide over 120 degrees located at approx. 0.8 in. (20 mm) from the outer end of the bracket. | Whatever the size of the wear groove found, replace the wire-mesh bushing. |
| 4.Cooling air tubes for: | | |
| A.Cracks in tubes | Any numbers, if not longer than 2 in. (50.8 mm) and separated by at least one support member. | |
| B.Dents | Any number, if no more than 30 percent of tube outer diameter. | |
| C.Cracks in tube clamps | Any number if tubes are correctly attached. | |
| 5.Low Pressure Turbine Active Clearance Control (LPTACC) cooling air manifold for: | | |
| A.Cracks | Not serviceable. | |
| B.Dents, collapse or flat areas | Any amount if depth is not more than five percent of the outer diameter of the tube. | |
| 6.LPTACC cooling air duct for: | | |
| A.Cracks | Not serviceable. | |
| B.Dents, collapse or flat areas | Any amount if depth is not more than five percent of the outer diameter of the tube. | |
Subtask 72-54-00-410-093-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 cowl doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 72-54-00-440-065-A ** ON A/C NOT FOR ALL Subtask 72-54-00-410-094-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 cowl doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR