Fault in the Slide Bottle Pressure for the LH Emergency Exit

TASK 25-62-00-810-805-A
Fault in the Slide Bottle Pressure for the LH Emergency Exit

1. Possible Causes

RESERVOIR ASSY OWS L [7506MM]
DEU-B [300RH4]
wiring
DEU-B [300RH6]

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

REFERENCE	QTY	DESIGNATION
No specific	1	MIRROR - INSPECTION

B. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 23-73-00-810-827-A	DEU-B - Fault in DEU-B 300RHx with connected systems/devices
AMM 23-73-00-740-003	BITE-Test of the Cabin Intercommunication Data System (CIDS) through the PTP
AMM 23-73-00-740-005	BITE-Test of the Cabin Intercommunication Data System (CIDS) through the CFDS
ASM 237325
ASM 237326
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 25-62-46-000-001	Inflation Reservoir, Offwing Escape-Slide - Removal
AMM 25-62-46-400-001	Inflation Reservoir, Offwing Escape-Slide - Installation
ASM 256501

3. Fault Confirmation
Subtask 25-62-00-710-054-A ** ON A/C NOT FOR ALL

A. Test
(1) Do the BITE test of the CIDS through the programming and test panel (PTP) AMM 23-73-00-740-003, or through the centralized fault display system (DFDS) AMM 23-73-00-740-005.

Subtask 25-62-00-710-054-B ** ON A/C NOT FOR ALL

A. 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 25-62-00-810-060-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 25-62-00-810-111-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 25-62-00-810-054-A ** ON A/C NOT FOR ALL

C. If the test gives the maintenance message SLIDE BOTTLE EMER L or DEU-B 300RH4:
(1) Get access to the inflation reservoir assembly AMM 25-62-46-000-001.

NOTE: Only use the access procedure.

(2) Make sure that the pressure gage shows the correct pressure.
(a) Use a MIRROR - INSPECTION to let you see the pressure gage.

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.

(b) 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.

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 RESERVOIR ASSY OWS L [7506MM] AMM 25-62-46-000-001 and AMM 25-62-46-400-001.

(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:
DEU-B [300RH4] connector C/36 and the SLIDE BOTTLE PRESS SENSOR connector A/A ASM 256501 and ASM 237325.

(6) Close the access to the inflation reservoir AMM 25-62-46-400-001.

NOTE: Only use the close-up procedure.

Subtask 25-62-00-810-054-B ** ON A/C NOT FOR ALL

C. If the test gives the maintenance message
SLIDE BTL 3L/DEU B (300RH6) and/or
DEU-B 300RH6:
(1) Get access to the inflation reservoir assembly AMM 25-62-46-000-001.

NOTE: Only use the access procedure.

(2) Make sure that the pressure gage shows the correct pressure.
(a) Use a MIRROR - INSPECTION to let you see the pressure gage.

(b) 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.

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.

Replace the RESERVOIR ASSY OWS L [7506MM] AMM 25-62-46-000-001 and AMM 25-62-46-400-001.

(4) If the pressure indication is correct:

Replace the DEU-B [300RH6] AMM 23-73-47-000-001 and AMM 23-73-47-400-001.

(5) If the fault continues:
(a) Do a check and repair the wiring between:

The DEU-B [300RH6] connector C/27 and the SLIDE BOTTLE PRESS SENSOR connector A/A
The SLIDE BOTTLE PRESS SENSOR connector A/C and GND ASM 237326.

(6) Close the access to the inflation reservoir AMM 25-62-46-400-001.

NOTE: Only use the close-up procedure.

Subtask 25-62-00-710-060-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 25-62-00-860-070-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