Fault in the Slide Bottle Pressure for the LH MID Door

TASK 25-62-00-810-807-A
Fault in the Slide Bottle Pressure for the LH MID Door

1. Possible Causes

PRESSURE BOTTLE DOOR 2LH [7774MM]
DEU-B [300RH4]
wiring

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 23-73-00-810-827-A	DEU-B - Fault in DEU-B 300RHx with connected systems/devices
AMM 23-73-00-740-005	BITE-Test of the Cabin Intercommunication Data System (CIDS) through the CFDS
ASM 237327
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)
AMM 25-62-49-000-001	Inflation Reservoir, Escape-Slide - Removal
AMM 25-62-49-400-001	Inflation Reservoir, Escape-Slide - Installation
ASM 256501

3. Fault Confirmation
Subtask 25-62-00-710-062-B ** ON A/C NOT FOR ALL

A. Test
(1) Do the Interface and Power-Up Test of the Cabin Intercommunication Data System (CIDS) via the CFDS AMM 23-73-00-740-005.

4. Fault Isolation
Subtask 25-62-00-810-062-A ** ON A/C NOT FOR ALL

A. If the test gives a different maintenance message:

Do the trouble shooting procedure related to the maintenance message.

Subtask 25-62-00-810-113-A ** ON A/C NOT FOR ALL

B. If the test gives multiple maintenance messages:

Do the trouble shooting procedure for the related DEU-B and connected systems/devices (Ref. TSM TASK 23-73-00-810-827).

Subtask 25-62-00-810-063-B ** ON A/C NOT FOR ALL

C. If the test gives the maintenance message SLIDE BOTTLE 2L/ DEU-B 300RH4:
(1) Get access to the inflation reservoir AMM 25-62-49-000-001,

NOTE: Only use the access procedure.

(2) Make sure that the pressure gage shows the correct pressure.

NOTE: There are two different types of pressure gage (MODEL A and MODEL B). MODEL A has a green cursor which is temperature sensitive. MODEL B has a needle with an internal mechanism, which is temperature sensitive. They can give temporary low pressure indications when there are sudden changes from a cold to a warm environment. This usually occurs after a longer flight and the aircraft door is opened in a warm environment. The cursor/needle moves to changes in temperature faster than the gas pressure can react in the inflation reservoir.

(a) The indications for MODEL A are as follows:

AREA A (green cursor width) shows a correct pressure level.
AREA B, which is half the range of AREA A, shows a pressure level that can be accepted if sudden temperature changes occurred in the last 60 minutes.

(b) The indications for MODEL B are as follows:

The GREEN BAND shows a correct pressure level.
AREA B, which has a range equal to AREA A, shows a pressure level that can be accepted if sudden temperature changes occurred in the last 60 minutes.

(3) If the pressure gage shows an indication in AREA B:
(a) Let temperature conditions become stable and then examine the pressure gage again.
(b) If the pressure gage continues to show an indication in AREA B:

Replace the PRESSURE BOTTLE DOOR 2LH [7774MM] , AMM 25-62-49-000-001 and AMM 25-62-49-400-001.

(4) If the pressure indication is correct:

Replace the DEU-B [300RH4] , AMM 23-73-47-000-001 and AMM 23-73-47-400-001.

(5) If the fault continues:

Do a check and repair the wiring between the:
DEU-B [300RH4] connector C/27 and the SLIDE BOTTLE PRESS SENSOR connector A/A ASM 256501 and ASM 237327.

(6) Close access to the inflation reservoir AMM 25-62-49-400-001.

NOTE: Only use the close-up procedure.

Subtask 25-62-00-710-063-A ** ON A/C NOT FOR ALL

D. Do the test as given in paragraph 3. A. to check the correct operation (no maintenance message is shown).

5. Close-up
Subtask 25-62-00-860-072-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.

[Rev.8 from Aug 2018] 2026.04.04 04:27:02 UTC