Removal of the Quantity Transmitter

TASK 38-13-11-000-001-A
Removal of the Quantity Transmitter

ZONE: 138
ZONE: 170
FIN: 3MA

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 2M (6 FT) - ADJUSTABLE
No specific	AR	CAP - BLANKING
No specific	1	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
138	BAY BETW AFT PART. BULKHEAD OF FWD CARGO
170	AFT CAB U/FLOOR COMPT AFT BHD OF BULK
161DW, 162DW
242CF

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-24-38-680-001-A	Draining of the Potable Water System (with Electrical Power)
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 25-21-41-000-001-A	Removal of the Passenger Seats
TASK 25-28-41-000-001-A	Removal of the Textile Floor Covering
TASK 25-55-12-000-001-A	Removal of the Aft Cargo-Compartment Partition at FR65
TASK 38-11-41-000-001-A	Removal of the Potable Water Tank
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-30-00-860-003-A	Open the FWD or Aft Cargo-Compartment Door with the Hand Pump
TASK 52-30-00-860-006-A	Open the Bulk Cargo-Compartment Door
TASK 53-32-12-000-002-A	Removal of the Cabin Floor Panels
Removal/Installation of the Quantity Transmitter 3MA ** ON A/C NOT FOR ALL
Removal/Installation of the Quantity Transmitter 3MA ** ON A/C NOT FOR ALL
Removal/Installation of the Quantity Transmitter 3MA ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 38-13-11-861-050-A

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

Subtask 38-13-11-010-050-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the aft cargo-compartment door (Ref. AMM TASK 52-30-00-860-001) or (Ref. AMM TASK 52-30-00-860-003).
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position below the aft cargo-compartment door.
(3) Set CARGO COMPT LIGHT switch 8LU to ON.
(4) Remove partitions 161DW and 162DW (Ref. AMM TASK 25-55-12-000-001).

Subtask 38-13-11-010-050-B ** ON A/C NOT FOR ALL

B. Get Access
(1) Get access to the cabin.
(2) Remove the right passenger seats from frame 35 to frame 36 (Ref. AMM TASK 25-21-41-000-001).
(3) Remove the right textile-floor covering from frame 35 to frame 36 (Ref. AMM TASK 25-28-41-000-001).
(4) Remove floor panel 242CF (Ref. AMM TASK 53-32-12-000-002).

Subtask 38-13-11-010-050-D ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the bulk cargo-compartment door (Ref. AMM TASK 52-30-00-860-006).
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position below the bulk cargo-compartment door.
(3) Set CARGO COMPT LIGHT switch 18LU to ON.
(4) Remove partitions 161DW and 162DW (Ref. AMM TASK 25-55-12-000-001).

Subtask 38-13-11-680-050-A ** ON A/C NOT FOR ALL

C. Drain the potable water system (Ref. AMM TASK 12-24-38-680-001).
(1) Do not close the potable water-service panel-door 171AL.

Subtask 38-13-11-680-050-B ** ON A/C NOT FOR ALL

C. Drain the potable water system (Ref. AMM TASK 12-24-38-680-001).
(1) Do not close the potable water-service panel-door 171AL.
(2) Examine the drain valve 14MP and make sure it is open.

NOTE: If the the drain valve 14MP is not open, then you must open it manually.

Subtask 38-13-11-941-051-A

D. Safety Precautions
(1) Put WARNING NOTICE(S) in position:

in the cockpit on the Engine Control Panel 115VU to tell persons not to start the engine(s)
in the cockpit on the AIR COND Overhead Control Panel 30VU to tell persons not to push the ENG 1 BLEED, ENG 2 BLEED and APU BLEED pushbutton switches to the ON position
on the HP ground connection to tell persons not to pressurize the pneumatic system
on the Potable Water Service Panel 2023VU to tell persons not to pressurize the potable water system.

Subtask 38-13-11-865-052-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
2000VU	WATER SYSTEM-QANT-IND	1MA	B01
** ON A/C NOT FOR ALL
2001VU	WATER SYS-QUANT-IND	1MA	B06
** ON A/C NOT FOR ALL
2001VU	WATER SYS-AIR-COMPRESSOR	19MD	F01

4. Procedure
Subtask 38-13-11-020-050-B ** ON A/C NOT FOR ALL

A. Removal of the Quantity Transmitter 3MA

WARNING: MAKE SURE THAT THE POTABLE WATER SYSTEM IS DEPRESSURIZED. A PRESSURIZED SYSTEM CAN CAUSE INJURY TO PERSONS WHEN THEY DO WORK ON IT.

(1) Disconnect the electrical connector (5) from the quantity transmitter (1).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Remove all the connections and the attachment clamps (Ref. AMM TASK 38-11-41-000-001) but do not remove the tank.
(4) Turn the tank so that the transmitter is free for removal.
(5) Remove the nuts (4) and the washers (3).
(6) Remove the quantity transmitter (1).
(7) Put a PLUG - BLANKING into the hole in the potable water tank.
(8) Remove and discard the packing (2).

Subtask 38-13-11-020-050-C ** ON A/C NOT FOR ALL

A. Removal of the Quantity Transmitter 3MA

WARNING: MAKE SURE THAT THE POTABLE WATER SYSTEM IS DEPRESSURIZED. A PRESSURIZED SYSTEM CAN CAUSE INJURY TO PERSONS WHEN THEY DO WORK ON IT.

(1) Disconnect the electrical connector (5) from the quantity transmitter (1).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Remove the nuts (4) and the washers (3).
(4) Remove the quantity transmitter (1).
(5) Put a PLUG - BLANKING into the hole in the potable water tank.
(6) Remove and discard the packing (2).

Subtask 38-13-11-020-050-D ** ON A/C NOT FOR ALL

A. Removal of the Quantity Transmitter

WARNING: MAKE SURE THAT THE POTABLE WATER SYSTEM IS DEPRESSURIZED. A PRESSURIZED SYSTEM CAN CAUSE INJURY TO PERSONS WHEN THEY DO WORK ON IT.

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.

(1) Disconnect the electrical connector (1) from the quantity transmitter (4).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Remove the connections and the clamps that are attached to the potable water tank (6) to make sure that it turns freely (Ref. AMM TASK 38-11-41-000-001).
(4) Do not remove the potable water tank (6) at this time.
(5) Turn the potable water tank (6) until the quantity transmitter (4) is free for the removal.
(6) Remove the nuts (2) and the washers (3).
(7) Remove the quantity transmitter (4).
(8) Remove the gasket (5) and discard it.
(9) Put the PLUG - BLANKING into the hole of the potable water tank (6).

[Rev.10 from 2021] 2026.04.05 10:36:32 UTC