Removal of the Rain-Repellent Check Valve

TASK 30-45-46-000-001-A
Removal of the Rain-Repellent Check Valve

WARNING: DO NOT GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:

FLUSH IT AWAY WITH CLEAN WATER
GET MEDICAL AID.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

WARNING: MAKE SURE THAT THE CIRCUIT BREAKERS RELATED TO THE WEATHER RADAR ARE OPENED, SAFETIED AND TAGGED.

CAUTION: MAKE SURE THAT THE FLUID DOES NOT STAY ON THE AIRCRAFT STRUCTURE. IF THE FLUID GETS ON THE AIRCRAFT STRUCTURE, WASH IT OFF IMMEDIATELY WITH SOAP AND WATER.

NOTE: If there is leakage of FORALKYL 2211, you can smell a pine odor.

ZONE: 120
FIN: 3DM
FIN: 4DM

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	CONTAINER 3 L(3/4 USGAL)
No specific	1	HOSE - PLASTIC
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BBD1)	Non Aqueous Cleaner-- Isopropyl Alcohol -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
120	AVIONICS COMPARTMENT

D. Referenced Information

REFERENCE	DESIGNATION
TASK 30-45-00-600-001-A	Servicing of the Rain Repellent Fluid Can
Rain-Repellent Check Valve

3. Job Set-up
Subtask 30-45-46-100-050-A

A. Cleaning Instructions
(1) Make sure that the fluid does not stay on the aircraft furnishings.
If the fluid gets on the aircraft furnishings, clean with Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) .

Subtask 30-45-46-865-053-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	COM NAV/RADAR/1	5SQ1	K13
** ON A/C NOT FOR ALL
121VU	COM NAV/RADAR/2	5SQ2	K14
** ON A/C NOT FOR ALL
FOR FIN: 3DM (CHECK VALVERAIN RPLNT)
49VU	ANTI ICE/RAIN/RPLNT/CAPT	1DB1	D01
FOR FIN: 4DM (CHECK VALVERAIN RPLNT)
122VU	ANTI ICE/RAIN/RPLNT/F/O	1DB2	W11

Subtask 30-45-46-941-051-A ** ON A/C NOT FOR ALL

C. Preparation
(1) Remove the protective cap from the drain valve.
(2) Connect a HOSE - PLASTIC to the drain valve of the rain-repellent fluid gage assy.
(3) Put the hose outlet in a CONTAINER 3 L(3/4 USGAL).

Subtask 30-45-46-869-052-A ** ON A/C NOT FOR ALL

D. Depressurization of the System

CAUTION: MAKE SURE THAT THE HOSE OUTLET IS IN THE CONTAINER.

(1) Push the purge pushbutton of the fluid gage to release the pressure from the system.
(2) Disconnect the hose from the drain valve.
(3) Install the protective cap on the drain valve.

Subtask 30-45-46-020-051-A ** ON A/C NOT FOR ALL

E. Remove the Rain-Repellent Fluid Can (Ref. AMM TASK 30-45-00-600-001).

Subtask 30-45-46-010-051-A

F. Get Access
(1) Loosen the four quarter-turn fasteners.
(2) Remove the panel 211LW.

4. Procedure
Subtask 30-45-46-020-052-A

A. Removal of the Check Valve
(1) Disconnect the line (3) from the union (2).
(2) Put the PLUG-BLANKING in each disconnected line end.
(3) Remove the check valve (1) and its union (2).
(4) Remove and discard the O-ring (5) from the mounting base (6) of the spray nozzle.
(5) Remove the union (2) from the check valve (1).
(6) Remove the O-ring (4) and discard it.
(7) Put a blanking plug on the mounting base (6) of the spray nozzle.

[Rev.10 from 2021] 2026.04.01 08:21:44 UTC