DOC AIRBUS | AMM A320FCheck of the IP Bleed Check Valve for Condition
TASK 36-11-41-200-001-A
Check of the IP Bleed Check Valve for Condition
Refer to the MPD TASK: 361141-03
CHECK OF IP BLEED CHECK VALVE FOR CONDITION
This task does the inspection/check of the two possible types of IP bleed check valve:
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 36-11-41-010-050-A ** ON A/C NOT FOR ALL Subtask 36-11-41-010-050-B ** ON A/C NOT FOR ALL 4. Procedure
Subtask 36-11-41-110-050-A ** ON A/C NOT FOR ALL
Subtask 36-11-41-410-050-A ** ON A/C NOT FOR ALL Subtask 36-11-41-410-050-B ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 01:09:12 UTC
Check of the IP Bleed Check Valve for Condition
WARNING:
MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobRefer to the MPD TASK: 361141-03
CHECK OF IP BLEED CHECK VALVE FOR CONDITION
This task does the inspection/check of the two possible types of IP bleed check valve:
- with return spring(s)
- with no return spring.
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | GAGE - 1,2 MM (0,047) - FEELER |
| No specific | AR | GAGE - SPRING |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.08BBB1) | Non Aqueous Cleaner-- Petroleum Based - |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 453 | HOT SECTION |
| 463 | HOT SECTION |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 36-11-41-000-040-A | Removal of the Intermediate Pressure (IP) Bleed Check Valve |
| TASK 36-11-41-000-040-B | Removal of the Intermediate Pressure (IP) Bleed Check-Valve |
| TASK 36-11-41-400-040-A | Installation of the Intermediate Pressure (IP) Bleed Check-Valve |
| TASK 36-11-41-400-041-A | Installation of the Intermediate Pressure (IP) Bleed Check Valve |
| TASK 80-11-10-210-002-A | Starter Inspection for a probably FOD (Foreign Object Damage) |
| TASK 80-11-10-210-003-A | Starter Inspection for a Probably FOD (Foreign Object Damage) |
IP Bleed Check Valve-Functional Check with Return Spring(s)Subtask 36-11-41-010-050-A ** ON A/C NOT FOR ALL Subtask 36-11-41-010-050-B ** ON A/C NOT FOR ALL 4. Procedure
Subtask 36-11-41-110-050-A ** ON A/C NOT FOR ALL
A. Clean the IP Bleed Check Valve
(1) Clean the check valve with a Textile-Lint free Cotton - (Material No.14SBA1) moist with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) .
Subtask 36-11-41-210-051-A ** ON A/C NOT FOR ALL (1) Clean the check valve with a Textile-Lint free Cotton - (Material No.14SBA1) moist with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) .
B. Inspection of the IP Bleed Check-Valve
(1) Do the inspection of the IP bleed check-valve that has the return spring(s) as follows:
(a) Make sure that the IP bleed check-valve is in the correct condition.
(b) Specially make sure that the flappers, their seats, hinge pin and return springs of the flappers are in the correct condition.
(c) Make sure that there are no cracks, bosses, dents, corrosion or frictional wear:
1 Make sure that there are no missing parts:
a If you find the missing parts:
1 Install the end of the GAGE - SPRING on the middle point of the rim of the flapper.
2 Apply a force of 0 lbf (0.00 daN) to 1.34 lbf (0.60 daN) through a displacement angle of 0 deg (0 deg) to 20 deg (20 deg) on the flappers.
3 Make sure that the flappers move to the closed position:
(a) Make sure that the IP bleed check-valve is in the correct condition.
(b) Specially make sure that the flappers, their seats and the hinge pin are in the correct condition.
(c) Make sure that there are no cracks, bosses, dents, corrosion or frictional wear.
(d) Make sure that the flappers move freely to the closed position.
(e) Make sure that the flappers close fully by their weight.
(f) Do a detailed inspection of the IP bleed check-valve:
1 If you find missing parts:
Subtask 36-11-41-210-051-B ** ON A/C NOT FOR ALL (1) Do the inspection of the IP bleed check-valve that has the return spring(s) as follows:
(a) Make sure that the IP bleed check-valve is in the correct condition.
(b) Specially make sure that the flappers, their seats, hinge pin and return springs of the flappers are in the correct condition.
(c) Make sure that there are no cracks, bosses, dents, corrosion or frictional wear:
1 Make sure that there are no missing parts:
a If you find the missing parts:
- Replace the IP bleed check-valve (Ref. AMM TASK 36-11-41-000-040) and (Ref. AMM TASK 36-11-41-400-041).
- Do an inspection at the hot-air inlet manifold of the engine bleed pre-cooler:
* Examine the hot-air inlet manifold for nicks, cracks, dents or foreign object damage. - Do a visual inspection of the starter for foreign object damage (Ref. AMM TASK 80-11-10-210-002).
1 Install the end of the GAGE - SPRING on the middle point of the rim of the flapper.
2 Apply a force of 0 lbf (0.00 daN) to 1.34 lbf (0.60 daN) through a displacement angle of 0 deg (0 deg) to 20 deg (20 deg) on the flappers.
3 Make sure that the flappers move to the closed position:
- If the flappers do not move to the closed position, reject the valve.
(a) Make sure that the IP bleed check-valve is in the correct condition.
(b) Specially make sure that the flappers, their seats and the hinge pin are in the correct condition.
(c) Make sure that there are no cracks, bosses, dents, corrosion or frictional wear.
(d) Make sure that the flappers move freely to the closed position.
(e) Make sure that the flappers close fully by their weight.
(f) Do a detailed inspection of the IP bleed check-valve:
1 If you find missing parts:
- Replace the IP bleed check-valve (Ref. AMM TASK 36-11-41-000-040) and (Ref. AMM TASK 36-11-41-400-041).
- Do an inspection at the hot-air inlet manifold of the engine bleed pre-cooler:
* Examine the hot-air inlet manifold for nicks, cracks, dents or foreign object damage. - Do a visual inspection of the starter for foreign object damage (Ref. AMM TASK 80-11-10-210-002).
- Use the GAGE - 1,2 MM (0,047) - FEELER and make sure that the clearance A between the bushings of the flap (1) and the bushing (2) is less than 1.2 mm (0.05 in.).
NOTE: On in-service aircraft, the bushings become worn because of cycles and vibration. A clearance of less than 1.2 mm (0.05 in.) prevents too much wear on the bushings before the next check.
- If the clearance A between the bushings of the flap (1) and the bushing (2) is out of the limits, replace the IP bleed check-valve.
B. Inspection of the IP Bleed Check-Valve
(1) Do the inspection of the IP bleed check-valve that has the return spring(s) as follows:
(a) Make sure that the IP bleed check-valve is in the correct condition.
(b) Specially make sure that the flappers, their seats, hinge pin and return springs of the flappers are in the correct condition.
(c) Make sure that there are no cracks, bosses, dents, corrosion or frictional wear:
1 Make sure that there are no missing parts:
a If you find the missing parts:
1 Install the end of the GAGE - SPRING on the middle point of the rim of the flapper.
2 Apply a force of 0 lbf (0.00 daN) to 1.34 lbf (0.60 daN) through a displacement angle of between 0 deg (0 deg) to 20 deg (20 deg) on the flappers.
3 Make sure that the flappers move to the closed position:
a If the flappers do not move to the closed position, reject the valve.
(2) Do the inspection of the IP bleed check-valve that has no return spring as follows:
(a) Make sure that the IP bleed check-valve is in the correct condition.
(b) Specially make sure that the flappers, their seats and the hinge pin are in the correct condition.
(c) Make sure that there are no cracks, missing parts, bosses, dents, corrosion or frictional wear.
(d) Make sure that the flappers move freely to the closed position.
(e) Make sure that the flappers close fully by their weight.
(f) Do a detailed inspection of the IP bleed check-valve:
1 If you find missing parts:
5. Close-up(1) Do the inspection of the IP bleed check-valve that has the return spring(s) as follows:
(a) Make sure that the IP bleed check-valve is in the correct condition.
(b) Specially make sure that the flappers, their seats, hinge pin and return springs of the flappers are in the correct condition.
(c) Make sure that there are no cracks, bosses, dents, corrosion or frictional wear:
1 Make sure that there are no missing parts:
a If you find the missing parts:
- Replace the IP bleed check-valve (Ref. AMM TASK 36-11-41-000-040) and (Ref. AMM TASK 36-11-41-400-040).
- Do an inspection at the hot-air inlet manifold of the engine bleed pre-cooler:
* Examine the hot-air inlet manifold for nicks, cracks, dents or foreign object damage. - Do a visual inspection of the starter for foreign object damage (Ref. AMM TASK 80-11-10-210-003).
1 Install the end of the GAGE - SPRING on the middle point of the rim of the flapper.
2 Apply a force of 0 lbf (0.00 daN) to 1.34 lbf (0.60 daN) through a displacement angle of between 0 deg (0 deg) to 20 deg (20 deg) on the flappers.
3 Make sure that the flappers move to the closed position:
a If the flappers do not move to the closed position, reject the valve.
(2) Do the inspection of the IP bleed check-valve that has no return spring as follows:
(a) Make sure that the IP bleed check-valve is in the correct condition.
(b) Specially make sure that the flappers, their seats and the hinge pin are in the correct condition.
(c) Make sure that there are no cracks, missing parts, bosses, dents, corrosion or frictional wear.
(d) Make sure that the flappers move freely to the closed position.
(e) Make sure that the flappers close fully by their weight.
(f) Do a detailed inspection of the IP bleed check-valve:
1 If you find missing parts:
- Replace the IP bleed check-valve (Ref. AMM TASK 36-11-41-000-040) and (Ref. AMM TASK 36-11-41-400-040).
- Do an inspection at the hot-air inlet manifold of the engine bleed pre-cooler:
* Examine the hot-air manifold for nicks, cracks, dents or foreign object damage. - Do a visual inspection of the starter for foreign object damage (Ref. AMM TASK 80-11-10-210-003).
- Use the GAGE - 1,2 MM (0,047) - FEELER and make sure that the clearance A between the bushings of the flap (1) and the bushing (2) is less than 1.2 mm (0.05 in.).
NOTE: On in-service aircraft, the bushings become worn because of cycles and vibration. A clearance of less than 1.2 mm (0.05 in.) prevents too much wear on the bushings before the next check.
- If the clearance A between the bushings of the flap (1) and the bushing (2) is out of the limits, replace the IP bleed check-valve.
Subtask 36-11-41-410-050-A ** ON A/C NOT FOR ALL Subtask 36-11-41-410-050-B ** ON A/C NOT FOR ALL