Replacement of the Charging Valve and Percussion Mechanism Seals

TASK 52-22-00-860-005-A
Replacement of the Charging Valve and Percussion Mechanism Seals

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

ZONE: 833
ZONE: 834
ZONE: 835
ZONE: 843
ZONE: 844
ZONE: 845

1. Reason for the Job
Self explanatory
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	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	Torque wrench: range to between 3.15 and 2.85 m.daN (23.23 and 21.02 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.02BBB9)	Mineral Hydraulic Fluid-Damper - -
(Material No.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
833	EMERGENCY EXITS
834	EMERGENCY EXITS
835	MID PASSENGER/CREW DOOR
843	EMERGENCY EXITS
844	EMERGENCY EXITS
845	MID PASSENGER/CREW DOOR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
5	SHEAR PIN	AIPC 52-22-14-01-030
16	PACKINGS	AIPC 52-22-14-01-070
15	SEAL	AIPC 52-22-14-01-080
9	PACKING	AIPC 52-22-14-01-110
9	PACKING	AIPC 52-22-14-01-140

E. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
TASK 52-22-00-010-001-A	Opening of the Emergency Exit Doors from the Passenger Compartment
TASK 52-22-00-410-001-A	Closing of the Emergency Exit Doors from the Passenger Compartment
TASK 52-22-00-614-002-A	Charging of the Door Damper and Emergency Operation Cylinders at the Emergency Exit Doors
Charging Valve Seal ** ON A/C NOT FOR ALL
Charging Valve Seal ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 52-22-00-861-054-A ** ON A/C NOT FOR ALL

A. Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).

Subtask 52-22-00-865-066-A ** ON A/C NOT FOR ALL

B. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	EIS/SLIDES/ARM AND WARN/FLT	15WN	P11
121VU	EIS/SLIDES/ARM AND WARN/GND	13WN	P10
121VU	EIS/SDAC1 AND 2/DOOR/DET/PAX	48WV	P05

Subtask 52-22-00-010-076-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Open the applicable emergency exit door (referred to as the door) (Ref. AMM TASK 52-22-00-010-001).
(2) Make sure that the ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE is in position below the applicable door.

Subtask 52-22-00-860-087-A ** ON A/C NOT FOR ALL

D. Aircraft Maintenance Configuration

Charging Valve Seal ** ON A/C NOT FOR ALL

(1) Make sure that the rigging pin (4) is correctly installed in the percussion mechanism.
(2) Remove and discard the shear pin (5).
(3) Set the release lever (3) as follows:
(a) Remove and discard the lockwire from the knurled screw (2).
(b) Loosen the knurled screw (2) sufficiently until you can move the release lever (3).
(c) Move the release lever (3) rearward until it is free from the guide (6).
(d) Turn the release lever (3) through 90 degrees clockwise to get access to the striker assembly (17).
(e) Tighten the knurled screw (2) sufficiently to safety the release lever (3).
(4) Remove the dust cap (11) from the pressure charging valve (10).
(5) Operate the pressure charging valve (10) until the door damper and emergency operation cylinder (1) is fully depressurized.

4. Procedure
Subtask 52-22-00-020-052-A ** ON A/C NOT FOR ALL

A. Removal of the Percussion Mechanism Seal (15) and the Packings (16)

WARNING: MAKE SURE THAT THE DOOR-DAMPER AND EMERGENCY OPERATION CYLINDER IS FULLY DEPRESSURIZED BEFORE YOU REMOVE THE STRIKER ASSEMBLY. IF NOT, REMAINING PRESSURE CAN CAUSE INJURY.

(1) Remove the striker assembly (17) as follows:
(a) Remove the screws (18) from the striker assembly (17).
(b) Carefully remove the striker assembly (17) from the housing assembly (8).
(c) Remove the diaphragm (14), the spacer (12) and the spring (13) from the striker assembly (17).
(d) Remove and discard the packings (16) from the striker assembly (17).
(e) Remove and discard the seal (15) from the striker assembly (17).

Subtask 52-22-00-020-053-A ** ON A/C NOT FOR ALL

B. Removal of the Charging Valve Packing (9)
(1) Remove the charging valve (10) from the housing assembly (8).
(2) Remove and discard the packing (9) from the charging valve (10).

Subtask 52-22-00-860-088-A ** ON A/C NOT FOR ALL

C. Preparation for Installation
(1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Clean the component interfaces and the adjacent area.
(3) Do an inspection of the component interfaces and the adjacent area.

Subtask 52-22-00-420-052-A ** ON A/C NOT FOR ALL

D. Installation of the Percussion Mechanism Seal and the Packings

WARNING: MAKE SURE THAT YOU INSTALL THE CORRECT (ALUMINUM) SHEAR PIN ON THE DOOR-DAMPER PERCUSSION DEVICE. INSTALLATION OF AN INCORRECT SHEAR PIN WILL PREVENT OPERATION OF THE ACTUATOR IN THE EMERGENCY MODE.

(1) Apply the Mineral Hydraulic Fluid-Damper - - (Material No.02BBB9) on the new AIPC 52-22-14-01-080 SEAL (15) and the new AIPC 52-22-14-01-070 PACKINGS (16).
(2) Install the seal (15) and the packings (16) on the striker assembly (17).
(3) Install the spacer (12), the spring (13) and the diaphragm (14) in the striker assembly (17).
(4) Install the striker assembly (17) into the housing assembly (8) with the screws (18).
(5) Tighten the screws (18).

NOTE: When the screws (18) are tight, there is a clearance of between 0.3 mm (0.0118 in.) and 0.4 mm (0.0157 in.) between the striker assembly (17) and the housing assembly (8).

Subtask 52-22-00-420-053-A ** ON A/C NOT FOR ALL

E. Installation of the Charging Valve Packing
(1) Apply the Mineral Hydraulic Fluid-Damper - - (Material No.02BBB9) to the new AIPC 52-22-14-01-110 PACKING (9) or the new AIPC 52-22-14-01-140 PACKING (9).
(2) Install the packing (9) on the charging valve (10).
(3) Install the charging valve (10) into the housing assembly (8).
(4) TORQUE the charging valve (10) to between 3.15 and 2.85 m.daN (23.23 and 21.02 lbf.ft )

.
(5) Install the new AIPC 52-22-14-01-030 SHEAR PIN (5) in the guide (6).

5. Close-up
Subtask 52-22-00-860-089-A ** ON A/C NOT FOR ALL

A. Put the system back to the serviceable condition.
(1) Charge the pressure accumulator to the correct pressure (Ref. AMM TASK 52-22-00-614-002).
(2) Set the release lever (3) to its armed position as follows:
(a) Loosen the knurled screw (2) and turn the release lever (3) through 90 degrees (in a counterclockwise direction) until it engages with the guide (6).
(b) Push the release lever (3) forward through the guide (6).
(c) Make sure that the release lever (3) is fully engaged with the guide (6).
(d) Move the release lever (3) fully forward and tighten the knurled screw (2) to hold the release lever (3) in the armed position.
(e) Safety the knurled screw (2) with the lockwire 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(3) Remove the rigging pin (4) from the housing assembly (8).

Subtask 52-22-00-865-067-A ** ON A/C NOT FOR ALL

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	EIS/SLIDES/ARM AND WARN/FLT	15WN	P11
121VU	EIS/SLIDES/ARM AND WARN/GND	13WN	P10
121VU	EIS/SDAC1 AND 2/DOOR/DET/PAX	48WV	P05

Subtask 52-22-00-410-066-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the applicable emergency exit door (Ref. AMM TASK 52-22-00-410-001).
(3) De-energize the ground service network (Ref. AMM TASK 24-42-00-862-001).
(4) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.02 06:27:36 UTC