Loss of Pressure in the Damper and Emergency Operation Cylinder for the L FWD Passenger/Crew Door

TASK 52-11-00-810-827-A
Loss of Pressure in the Damper and Emergency Operation Cylinder for the L FWD Passenger/Crew Door

1. Possible Causes

cylinder diaphragm
[360RH1]
DEU-B [300RH1]
wiring from the DEU B (300RH1) C/28 to the pressure sensor of the door-damper and emergency-operation cylinder (360RH1)

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 23-73-00-740-005	BITE-Test of the Cabin Intercommunication Data System (CIDS) through the CFDS
AMM 23-73-47-000-001	Removal of the Decoder/Encoder Unit B (300RH)
AMM 23-73-47-400-001	Installation of the Decoder/Encoder Unit B (300RH)
ASM 237351
AMM 52-10-00-210-004	Check Pressure of Emergency Cylinder/Accumulator of the Passenger/Crew Doors
AMM 52-10-00-610-001	Replacement of the Diaphragm in the Percussion Mechanism of the Door Damper and Emergency Operation Cylinder of the Passenger/Crew Doors
AMM 52-10-00-610-002	Replacement of the O-ring Seal of the Filling Valve
AMM 52-10-00-610-003	Replacement of the Filling Valve of the Door Damper and Emergency Operation Cylinder of the Passenger/Crew Doors
AMM 52-10-00-614-001	Discharging/Charging of the Door Damper and Emergency Operation Cylinder of the Passenger/Crew Doors
AMM 52-10-00-790-001	Leak Test of the Damper and Emergency Operation Cylinder of the Passenger/Crew Doors
AMM 52-11-14-000-001	Removal of the Door-Damper and Emergency-Operation Cylinder
AMM 52-11-14-220-001	Detailed Visual Inspection of the Mechanism of the Door-Damper and Emergency- Operation Cylinder
AMM 52-11-14-400-001	Installation of the Door-Damper and Emergency-Operation Cylinder

3. Fault Confirmation
Subtask 52-11-00-740-050-A

A. Test
(1) Do the BITE test of the CIDS through the CFDS AMM 23-73-00-740-005.

4. Fault Isolation
Subtask 52-11-00-810-076-A

A. If the test gives the maintenance message: DOOR BOTTLE FWD L.
(1) Do a check of the pressure indicator at the door damper and emergency operation cylinder for the FWD passenger/crew door, left side AMM 52-10-00-210-004.
(a) If the pressure indication is not correct:

Do a check of the cylinder diaphragm in the percussion mechanism.

1 If there are holes in the cylinder diaphragm:

Do a check of the telescopic rod AMM 52-11-14-220-001 and make sure that the bolt of the telescopic rod is not bent or has no distortion.
Replace the cylinder diaphragm AMM 52-10-00-610-001.

2 If there are no holes in the cylinder diaphragm:

Do a leak test of the door damper and emergency operation cylinder of the passenger/crew doors AMM 52-10-00-790-001.

3 If there is a leak at the filling valve:

Replace the o-ring seal of the filling valve AMM 52-10-00-610-002.

a If the fault continues:

Replace the filling valve AMM 52-10-00-610-003.

4 If there is a leak at the percussion mechanism:

Replace the diaphragm in the percussion mechanism AMM 52-10-00-610-001

5 If there is a leak at the cylinder body or the pressure gauge:

Replace the defective element AMM 52-11-14-000-001 and AMM 52-11-14-400-001.

6 If there is no leak:

Charge the [360RH1] AMM 52-10-00-614-001.
Make an entry in the applicable log book. If this is the third log book entry with the maintenance message DOOR BOTTLE FWD L, within a period of four weeks, replace the [360RH1] AMM 52-11-14-000-001 and AMM 52-11-14-400-001.

(b) If the pressure indication is correct:

Replace the [360RH1] AMM 52-11-14-000-001 and AMM 52-11-14-400-001.

(2) If the fault continues:

Replace the DEU-B [300RH1] AMM 23-73-47-000-001 and AMM 23-73-47-400-001.

(3) If the fault continues:
Do a check and repair the wiring from the DEU B (300RH1) C/28 to the pressure sensor of the door-damper and emergency-operation cylinder (360RH1) ASM 237351.

Subtask 52-11-00-740-051-A

B. Test
Do the test given in Para. 3.A.

[Rev.8 from Aug 2018] 2026.04.04 04:34:44 UTC