Functional Check of Overpressure Valve

TASK 36-11-53-720-803-A
Functional Check of Overpressure Valve

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: YOU MUST NOT TOUCH HOT PARTS WITHOUT APPLICABLE GLOVES. HOT PARTS CAN CAUSE AN INJURY.

WARNING: MAKE SURE THAT THE SAFETY DEVICES AND THE WARNING NOTICES ARE IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

WARNING: BEFORE YOU START WORK, YOU MUST PUT ON A SAFETY HARNESS AND ATTACH IT TO THE ACCESS PLATFORM. WITHOUT A SAFETY HARNESS, YOU CAN FALL. THIS CAN KILL YOU OR CAUSE YOU INJURY.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

ZONE: 413
ZONE: 414
ZONE: 423
ZONE: 424
FIN: 7115HM1
FIN: 7115HM2

1. Reason for the Job
Refer to the MPD TASK: 361100-03
FUNCTIONAL CHECK OF OVERPRESSURE VALVE.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE
No specific	1	AIR SOURCE - REGULATED, FILTERED, DRY
No specific	AR	WARNING NOTICE(S)
No specific	1	WRENCH - STANDARD
No specific	Torque wrench: range to between 0.5 and 0.4 m.daN (44.25 and 35.40 lbf.in )
98D36109001000	1	TEST SET-EBAS,BLEED

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
413	UPPER FWD PYLON
414	UPPER FWD PYLON
423	UPPER FWD PYLON
424	UPPER FWD PYLON
FOR [1000EM1] (ENGINE-1)
413CT
FOR [1000EM2] (ENGINE-2)
423CT

D. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
Functional Test of the Overpressure Valve with the Test Set P/N 98D36109001000

3. Job Set-up
Subtask 36-11-53-861-059-A

A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 36-11-53-941-060-A

B. Safety Precautions
(1) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(2) On AIR COND panel 30VU:

Make sure that the ENG 1(2) BLEED pushbutton switch is released (the OFF legend is on).
Make sure that the APU BLEED pushbutton switch is released (the ON legend is off).
Put a WARNING NOTICE(S) in position to tell persons not to operate the pneumatic system.

(3) On ENG panel 115VU:

Put a WARNING NOTICE(S) in position to tell persons not to start engine 1(2).

(4) On the HP ground connector:

Put a WARNING NOTICE(S) in position to tell persons not to pressurize the pneumatic system.

(5) On the ENG section of maintenance panel 50VU:

Make sure that the ON legend of the ENG/FADEC GND PWR 1(2) pushbutton switch is off.
Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 36-11-53-865-063-A

C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	AIR BLEED/APU BLEED VLV CTL/BMC1 OVRD	11HV	D14
49VU	AIR BLEED/X FEED/VALVE/BAT	2HV	D13
49VU	AIR BLEED/ENG 2/MONG	3HA2	D12
49VU	AIR BLEED/ENG 1/CTL	2HA1	D11
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22
122VU	AIR BLEED/X FEED VALVE/NORM	1HV	Z20
122VU	AIR BLEED/APU BLEED VLV CTL/BMC2 OVRD	12HV	Z19

Subtask 36-11-53-010-069-A

D. Get Access
(1) Put the ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE in position at the pylon access.
(2) Remove the access panels:
(a) FOR [1000EM1] (ENGINE-1)
413CT.
(b) FOR [1000EM2] (ENGINE-2)
423CT.

4. Procedure
Subtask 36-11-53-750-051-A

A. Manual Test of the Overpressure Valve
(1) On the OPV position indicator, record the position of the valve butterfly.
(2) Make sure that the valve butterfly moves freely.

On the position indicator, use a WRENCH - STANDARD to fully open and fully close the valve butterfly.
Put the valve butterfly in the initial position that you recorded.

Subtask 36-11-53-480-057-A

B. Preparation for the Functional Test

CAUTION: BE CAREFUL WHEN YOU CONNECT/DISCONNECT THE TEST SET TO/FROM THE EQUIPMENT. THE PRESSURE REGULATING VALVE AND THE PRESSURE GAGE ASSEMBLY OF THE TEST SET ARE HEAVY AND CAN CAUSE DAMAGE TO THE ENGINE.

(1) Removal of the lockwire.

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

(a) Cut and discard the lockwire from the blanking plug on the test port.
(2) Remove the blanking plug from the test port of the overpressure valve.
(3) Connect manually the adaptor assembly with the short hose to the test port.
(4) Close the shutoff valve, the purge valve and the pressure regulator valve on the 98D36109001000 TEST SET-EBAS,BLEED.

NOTE: If the air cylinder has a regulator valve, it is not necessary to install the primary regulator valve supplied with the test set.

(5) Connect manually the AIR SOURCE - REGULATED, FILTERED, DRY to the 98D36109001000 TEST SET-EBAS,BLEED.
(6) Set the digital pressure gage back to zero.

Subtask 36-11-53-720-080-A

C. Functional Test of the Overpressure Valve with the Engine Bleed System Test Set
(1) Do this test:

ACTION	RESULT
1.On the AIR SOURCE - REGULATED, FILTERED, DRY: Open the shutoff valve.	On the AIR SOURCE - REGULATED, FILTERED, DRY: The cylinder pressure gage shows the pressure.
2.On the AIR SOURCE - REGULATED, FILTERED, DRY: Use the primary regulator to pressurize to 100 psi (6.89 bar).	On the AIR SOURCE - REGULATED, FILTERED, DRY: The primary gage shows 100 psi (6.89 bar).
3.On the 98D36109001000 TEST SET-EBAS,BLEED: Use the pressure regulator valve to slowly pressurize the system to 95 psi (6.55 bar).	On the OPV: Make sure that the visual position indicator shows that the OPV is closed.
4.On the 98D36109001000 TEST SET-EBAS,BLEED: Slowly depressurize the system to open the overpressure valve.	On the 98D36109001000 TEST SET-EBAS,BLEED, read the pressure gage: When the pressure is less than 70 psi (4.8 bar), the visual position indicator shows that OPV is open.
5.On the 98D36109001000 TEST SET-EBAS,BLEED: Depressurize the system to 0 psi (0.0000 bar).	On the OPV, the visual position indicator shows OPEN.
6.Depressurize the AIR SOURCE - REGULATED, FILTERED, DRY, and close the shutoff valve.

5. Close-up
Subtask 36-11-53-080-055-A

A. Disconnection of the Test Set

WARNING: BEFORE YOU START TO REMOVE THE TOOLING, MAKE SURE THAT THERE IS NO PRESSURIZED GAS LEFT INSIDE THE DUCTS. IT CAN CAUSE AN INJURY TO PERSONNEL AND/OR DAMAGE TO EQUIPMENT.

(1) Close the shutoff valve of the air cylinder.
(2) Slowly open the purge valve to depressurize the AIR SOURCE - REGULATED, FILTERED, DRY.
(3) Disconnection of the AIR SOURCE - REGULATED, FILTERED, DRY:
(a) Disconnect the short hose from the adaptor assembly.
(4) Remove the adaptor assembly from the test port.
(5) Disconnect the air cylinder from the 98D36109001000 TEST SET-EBAS,BLEED.
(6) Installation of the blanking plug on the test port.
(a) Install the blanking plug on the test port of the OPV.
(b) TORQUE the blanking plug to between 0.5 and 0.4 m.daN (44.25 and 35.40 lbf.in )

.
(7) Installation of the lockwire:

(a) Safety the blanking plug with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.

Subtask 36-11-53-410-065-A

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the access panels:
(a) FOR [1000EM1] (ENGINE-1)
413CT
(b) FOR [1000EM2] (ENGINE-2)
423CT.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

Subtask 36-11-53-865-064-A

C. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	AIR BLEED/APU BLEED VLV CTL/BMC1 OVRD	11HV	D14
49VU	AIR BLEED/X FEED/VALVE/BAT	2HV	D13
49VU	AIR BLEED/ENG 2/MONG	3HA2	D12
49VU	AIR BLEED/ENG 1/CTL	2HA1	D11
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22
122VU	AIR BLEED/X FEED VALVE/NORM	1HV	Z20
122VU	AIR BLEED/APU BLEED VLV CTL/BMC2 OVRD	12HV	Z19

Subtask 36-11-53-862-057-A

D. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 01:13:29 UTC