Check of the IP Bleed Check Valve for Condition

TASK 36-11-41-200-010-A
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.

ZONE: 450
ZONE: 460
FIN: 7110HM ** ON A/C NOT FOR ALL

1. Reason for the Job
Refer to the MPD TASK: 361141-04
CHECK OF IP BLEED CHECK VALVE FOR CONDITION
2. Job Set-up Information
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

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-002)	cleaning fluid
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
450	ENG 1 THRUST REVERSER & EXHAUST SECTION
460	ENG 2 THRUST REVERSER & EXHAUST SECTION

D. Referenced Information

REFERENCE	DESIGNATION
TASK 36-11-41-000-010-A	Removal of the Intermediate Pressure (IP) Bleed Check-Valve
TASK 36-11-41-400-010-A	Installation of the Intermediate Pressure (IP) Bleed Check Valve
IP Bleed Check Valve-Functional Check
Detailed Inspection of the IP Bleed Check Valve

3. Job Set-up
Subtask 36-11-41-010-055-A ** ON A/C NOT FOR ALL

A. Remove the IP bleed check valve (Ref. AMM TASK 36-11-41-000-010).

4. Procedure
Subtask 36-11-41-110-052-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 cleaning fluid (Material No.V01-002) .
(2) Dry the check valve with a clean lint-free cloth.

Subtask 36-11-41-210-055-A ** ON A/C NOT FOR ALL

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:

IP Bleed Check Valve-Functional Check ** ON A/C NOT FOR ALL

(a) Examine the valve for damage as follows:
1 If you find scratches or gouges with a depth of more than 0.25 mm (0.01 in.) on the valve seal faces, reject the seal.
2 If the valve has cracks, reject the valve.
(b) Put the flappers in the open position and do the steps that follows:
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 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 with their weight, reject the valve.

(2) Do the inspection of the IP bleed check-valve that has no return spring as follows:

Detailed Inspection of the IP Bleed Check Valve ** ON A/C NOT FOR ALL

(a) Examine the valve for damage as follows:
1 If you find scratches or gouges with a depth of more than 0.25 mm (0.01 in.) on the valve seal faces, reject the seal.
2 If you find cracks on the valve, reject the valve.
3 Make sure that the flappers move freely to the closed position.
4 Make sure that the flappers close fully by their weight.
(b) Do a detailed inspection of the IP bleed check-valve as follows:
1 If you find missing parts:

Replace the IP bleed check-valve and do an inspection of the hot-air inlet manifold of the engine bleed pre-cooler.

2 If you do not find missing parts:

Use the GAGE - 1,2 MM (0,047) - FEELER and make sure that 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 clearance A between the bushings of the flap (1) and the bushing (2) is not in the limit, replace the IP bleed check-valve.

5. Close-up
Subtask 36-11-41-410-054-A ** ON A/C NOT FOR ALL

A. Install the IP bleed check valve (Ref. AMM TASK 36-11-41-400-010).

[Rev.10 from 2021] 2026.04.01 01:09:13 UTC