Functional Test of the Windshield Rain Protection

TASK 30-45-00-720-001-A
Functional Test of the Windshield Rain Protection

WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.

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

CAUTION: DO NOT OPERATE THE WIPERS WHEN THE WINDSHIELD IS DRY. PUT WATER ON THE WINDSHIELD WHEN THE WIPERS OPERATE.

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	ACCESS PLATFORM 4M (13 FT)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)

3. Job Set-up
Subtask 30-45-00-010-053-A

A. Get Access
(1) Put the ACCESS PLATFORM 4M (13 FT) in position.

Subtask 30-45-00-861-050-A

B. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002)

Subtask 30-45-00-865-050-A

C. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
122VU	ANTI ICE/F/O/WIPER	4DB2	W12
122VU	ANTI ICE/WIPER/CAPT	4DB1	X12

Subtask 30-45-00-865-080-A

D. 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

Subtask 30-45-00-160-050-A

E. Cleaning.
(1) Make sure that the wiper blades are in the correct condition and clean the windshield before you operate the wipers.
(2) Put water continuously on the windshield when the wipers operate during this procedure.

4. Procedure
Subtask 30-45-00-720-050-A

A. Do this test :

ACTION	RESULT
On the WIPER section of the panel 21VU (22VU):	On the windshield :
1.Set the CAPT (F/O) WIPER selector switch to SLOW.	the wiper moves slowly make sure that the blade does not touch the metal part in the middle of the windshield make sure that the speed of the wiper is 95 strokes per minute + or - 15 percent make sure that the wiper blade moves smoothly and continuously. NOTE: If the motor is new, the first two strokes of the wiper (from the park position) do not always go full travel.
2.Set the CAPT (F/O) WIPER selector switch to FAST.	the wiper moves fast make sure that the speed of the wiper is 140 strokes per minute + or - 15 percent make sure that the wiper blade moves smoothly and continuously.
3.Set the CAPT (F/O) WIPER selector switch to OFF.	the wiper stops and moves to the park position.

5. Close-up
Subtask 30-45-00-865-081-A

A. Remove the safety clip(s) and the tag(s) and close 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

Subtask 30-45-00-862-050-A

B. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002)

Subtask 30-45-00-410-053-A

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 04:26:39 UTC