S 866-048
 (15) Remove electrical power, if it is not necessary.
 TASK 30-42-00-206-015
 3.  Windshield Wiper Blade Inspection_________________________________
 A. References
 (1)
AMM 24-22-00/201, Electrical Power - Control

 (2)
AMM 30-42-03/401, Windshield Wiper Arm/Blade

 B. Access
 (1)  Location Zones
 211/212 Control Cabin - Section 41

 C. Examine the Windshield Wiper Blade
 S 866-016
 (1) Supply electrical power to the main AC buses (AMM 24-22-00/201).
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MAINTENANCE MANUAL

 S 866-017
 (2)  
Put the WIPER switch in the OFF position to put the motor/converter unit in the park position.

 S 866-018

 (3)  
Open these circuit breakers on the overhead panel, P11, and attach DO-NOT-CLOSE tags:

 (a)  
11R13, WSHLD WIPER LEFT

 (b)  
11R22, WSHLD WIPER RIGHT

 S 866-019
 WARNING: OPEN THE WINDOW HEAT CIRCUIT BREAKERS BEFORE YOU DO MAINTENANCE
_______ ON THE WINDSHIELD WIPER SYSTEM. IF THE CIRCUIT BREAKERS ARE NOT OPEN DURING MAINTENANCE, PERSONS CAN GET AN ELECTRICAL SHOCK WHEN THEY TOUCH THE WINDSHIELD.
 (4)  Open these circuit breakers on the right miscellaneous relay panel, P37, and attach DO-NOT-CLOSE tags:
 (a)  
37E3, WINDOW HTR 2L

 (b)  
37E4, WINDOW HTR 3L

 (c)  
37J2, WINDOW HTR 1R

 S 866-023
 (5)  Open these circuit breakers on the miscellaneous electrical equipment panel, P70, and attach DO-NOT-CLOSE tags:
 (a)  
70A3, WINDOW HTR 2R

 (b)  
70A4, WINDOW HTR 3R

 (c)  
70C13, WINDOW HTR L

 S 216-024
 CAUTION:_______DO NOT LIFT THE WIPER ARM HIGHER THAN NECESSARY. DAMAGE TO THE WIPER ARM CAN OCCUR IF YOU LIFT IT TOO HIGH.
 (6)  Make sure the wiper blade is tightly attached to the wiper arm (Fig. 601).
 (a)  If necessary, tighten the locknut to 25-32 pound-inches.
 S 216-025
 (7)  Make sure the wiper blade is not worn.
 (a)  If necessary, replace the wiper blade (AMM 30-42-03/401).
 S 396-038
 (8)  If you removed sealant, apply new sealant. Put sealant over the bolts and screws and in the shaft tightening slot of the wiper arm hub (AMM 51-31-01/201).
　
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