Functional Test of the HPC Stage 10 Bleed Valve with Test Set IAE2R19437 [IAE]

TASK 75-32-54-700-011-A
Functional Test of the HPC Stage 10 Bleed Valve with Test Set IAE2R19437

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.

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
This procedure gives a functional test of the 10th stage bleed valve.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 1M(3 FT)
No specific	1	LIGHT SOURCE - TORCH
No specific	1	MIRROR - INSPECTION
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 177 and 159 lbf.in (2.00 and 1.80 m.daN )
IAE2R19437	1	TEST SET - BLEED VALVE

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V02-126)	lockwire

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
HPC Stage 10 Bleed Valves
Bleed Valve Test Set
Stage 7 Compressor Bleed Solenoid Valve Mounting Location

3. Job Set-up
Subtask 75-32-54-941-052-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 75-32-54-010-056-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010).
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Put the ACCESS PLATFORM 1M(3 FT) in position.

4. Procedure
Subtask 75-32-54-480-051-A ** ON A/C NOT FOR ALL

A. Install the IAE2R19437 TEST SET - BLEED VALVE.

HPC Stage 10 Bleed Valves ** ON A/C NOT FOR ALL

Bleed Valve Test Set ** ON A/C NOT FOR ALL

NOTE: The test set vacuum pipe can be difficult to connect to the bleed valve servo supply tube due to access limitations. An alternative, if time permits and the C-duct is open, is to use the green color-coded pipe, connected directly from the bleed valve connection to the test set BLEED VALVE VACUUM INPUT (5). If this option is chosen, this subtask is to be carried out at the bleed valve and the operator must be aware that the servo pipelines will not be leak checked.

(1) Cut and discard the lockwire and disconnect the bleed valve servo supply connector (1) at the solenoid. Ensure that sufficient access is afforded to connect the test set vacuum hose.
(2) Set TEST SELECT switch (2) to BLEED VALVE position.
(3) Set PRESSURE/VACUUM switch (3) to VACUUM.
(4) Set SELECT VENT switch (4) to OPEN, then CLOSE.
(5) Connect bleed valve servo tube connector (1) to test set blue vacuum hose. Connect vacuum hose to test set BLEED VALVE VACUUM INPUT quick release fiiting (5) colour coded blue.
(6) TORQUE bleed valve servo connector (1) to between 177 and 159 lbf.in (2.00 and 1.80 m.daN )

Subtask 75-32-54-720-052-A ** ON A/C NOT FOR ALL

WARNING: THE ELECTRONIC STETHOSCOPE CAN GENERATE LOUD NOISES. SWITCH ON THE STETHOSCOPE BEFORE WEARING THE HEADSET. USE A LOW VOLUME TO BEGIN WITH. INCREASE THE VOLUME SETTING SLOWLY IF NECESSARY.

B. Test the bleed valve

Bleed Valve Test Set ** ON A/C NOT FOR ALL

Stage 7 Compressor Bleed Solenoid Valve Mounting Location ** ON A/C NOT FOR ALL

NOTE: When you operate the hand pump, pause for three seconds after each stroke. This allows air to flow into pump valves and makes the task easier.

(1) Use the test set hand pump to attain a vacuum of 0.5 bar.

NOTE: When activating the test, listen carefully to the bleed valve being tested. Use the stethoscope supplied with the test set if necessary. If possible, use a LIGHT SOURCE - TORCH and MIRROR - INSPECTION to observe any movement of the bleed valve.

(2) Depress and hold TEST SWITCH pushbutton (6).
PASS: Click heard as bleed valve closes, or bleed valve seen to move.

NOTE: When the test switch is depressed continuously, air will leak through the bleed valve seals and the vacuum will be reduced. The bleed valve may open after a few seconds, this is a satisfactory condition.
If the test switch is released while the bleed valve is closed, the valve will spring open and a click will be heard this is a satisfactory condition.

FAIL: No movement of the bleed valve detected. If in doubt, remove the silencer and inspect for physical movement.
(3) Release the TEST SWITCH (6).
(4) Repeat steps this subtask twice to check for intermittent faults.

Subtask 75-32-54-080-051-A ** ON A/C NOT FOR ALL

C. Disconnection of the Test Set

Bleed Valve Test Set ** ON A/C NOT FOR ALL

(1) Disconnect the blue test set vacuum hose from the bleed valve servo tube connector (1).
(2) Disconnect the blue vacuum hose from the test set quick release fitting.

Subtask 75-32-54-480-052-A ** ON A/C NOT FOR ALL

D. Reconnection of the Engine Pneumatic Services

HPC Stage 10 Bleed Valves ** ON A/C NOT FOR ALL

(1) Reconnect the bleed valve servo tube connector (1) to the solenoid
(2) TORQUE bleed valve servo connector (1) to between 177 and 159 lbf.in (2.00 and 1.80 m.daN )

.
(3) Safety the connector (1) with lockwire (Material No.V02-126) .

5. Close-up
Subtask 75-32-54-410-055-A ** ON A/C NOT FOR ALL

A. Get Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010).
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 13:08:58 UTC