Pressure Leakage on the Door Damper and Emergency Operation Cylinder

TASK 52-22-00-810-815-A
Pressure Leakage on the Door Damper and Emergency Operation Cylinder

1. Possible Causes

seal of the pressure filling valve
pressure filling valve
door damper

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE
No specific	1	WATER - SOAPY SOLUTION
No specific	Torque wrench: range to between 1.1 and 0.9 m.daN (97.35 and 79.65 lbf.in )
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
No specific	OXYGEN LEAK DETECTION

C. Referenced Information

REFERENCE	DESIGNATION
AMM 52-22-00-010-001	Opening of the Emergency Exit Doors from the Passenger Compartment
AMM 52-22-00-410-001	Closing of the Emergency Exit Doors from the Passenger Compartment
AMM 52-22-00-614-002	Charging of the Door Damper and Emergency Operation Cylinders at the Emergency Exit Doors
AMM 52-22-00-860-003	Special Precaution before Maintenance on the Door Damper and Emergency Operation Cylinder
AMM 52-22-00-860-004	Special Precaution after Maintenance on the Door Damper and Emergency Operation Cylinder
AMM 52-22-00-860-005	Replacement of the Charging Valve and Percussion Mechanism Seals
AMM 52-22-14-000-001	Removal of the Door Damper and Emergency Operation Cylinder
AMM 52-22-14-400-001	Installation of the Door Damper and Emergency Operation Cylinder
Leak Check Points on the Door Damper and Emergency Operation Cylinder

3. Fault Confirmation
Subtask 52-22-00-860-063-A ** ON A/C NOT FOR ALL

A. Job Set-up
(1) Make sure that the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE is in position below the applicable emergency exit door.
(2) Open (but not fully) the applicable emergency exit door as necessary AMM 52-22-00-010-001.
(3) Do the special precautions before maintenance on the door damper and emergency operation cylinder (referred to as door damper) AMM 52-22-00-860-003.

Subtask 52-22-00-865-058-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	COM/CIDS/DEU B/ESS	153RH	G03

Subtask 52-22-00-860-065-A ** ON A/C NOT FOR ALL

C. Leak Test of the Door Damper

Leak Check Points on the Door Damper and Emergency Operation Cylinder ** ON A/C NOT FOR ALL

(1) Charge the pressure accumulator of the door damper with the correct pressure AMM 52-22-00-614-002.
(2) Apply a solution of OXYGEN LEAK DETECTION or a WATER - SOAPY SOLUTION to the subsequent components to find an air leak:

between the striker housing and the housing assy (leak point 1)
on the charging valve (leak point 2)
between the pressure gage and the bottle assembly (leak point 3)
on the vent hole of the bottle assembly (leak point 5)
between the charging valve and the bottle assembly (leak point 6)

4. Fault Isolation

WARNING: BEFORE YOU START WORK ON THE DOOR MAKE SURE THAT: - THE SLIDE CONTROL HANDLE IS IN THE DISARMED POSITION WITH THE SAFETY PIN INSTALLED. - THE PERCUSSION LEVER OF THE DOOR DAMPER CYLINDER IS IN THE DISARMED POSITION WITH THE SAFETY PIN INSTALLED.

Subtask 52-22-00-810-063-B ** ON A/C NOT FOR ALL

A. If you find a sign of nitrogen leaks (bubbles), continue as follows:
(1) If you find a leak on leak point 3:

TORQUE the pressure filling valve to between 3.15 and 2.85 m.daN (23.23 and 21.02 lbf.ft ) .

(a) If there are bubbles again:

replace the seal of the pressure filling valve AMM 52-22-00-860-005 and do the leak test again.

(2) If you find a leak on leak point 2:

TORQUE the charging valve nut to between 1.1 and 0.9 m.daN (97.35 and 79.65 lbf.in ) .

(a) If there are bubbles:

replace the pressure filling valve AMM 52-22-00-860-005 and do the leak test again.

(3) If you find a leak on leak point 4:

replace the door damper AMM 52-22-14-000-001 and AMM 52-22-14-400-001.

(4) If you find a leak on leak point 5:

replace the door damper AMM 52-22-14-000-001 and AMM 52-22-14-400-001.

(5) If you find a leak on leak point 6:

replace the door damper AMM 52-22-14-000-001 and AMM 52-22-14-400-001.

5. Close-up
Subtask 52-22-00-865-059-A ** ON A/C NOT FOR ALL

A. 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
49VU	COM/CIDS/DEU B/ESS	153RH	G03

Subtask 52-22-00-860-064-A ** ON A/C NOT FOR ALL

B. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Do the special precautions after maintenance on the door damper AMM 52-22-00-860-004.
(3) Close the applicable door AMM 52-22-00-410-001.

[Rev.8 from Aug 2018] 2026.04.04 04:40:41 UTC