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9) Open main switch-breaker. 10) Disconnect the ground power unit - refer to 24-40-00. ABAB Validity : WX 500 34-41-00Page 504 (BA) JUN 04 A74 PROCESSOR REMOVAL / INSTALLATION 1. REMOVAL OF A74 PROCESSOR (Figure 401) A. Tools and consumable material - None B. Procedure 1) Make sure that the main switch-breaker is open. 2) Install the warning sign prohibiting main switch-breaker operation. WARNING DO NOT OPERATE MAINTENANCE WORK IN PROGRESS 3) Open baggage compartment door 219. 4) Remove screws, washers and processor protecting cover. 5) Loosen hold-down mechanism (3). 6) Remove A74 processor (2) from rack (1). 2. INSTALLATION OF A74 PROCESSOR (Figure 401) A. Tools and consumable material - None B. Procedure 1) Inspect the interfaces for cleanliness and condition. 2) Engage A74 processor (2) in rack (1). 3) Tighten hold-down mechanism (3). 4) Repair existing bonding points on protecting cover - refer to 20-00-12. 5) Make sure all the tools and materials are removed and the work area is clean and free from debris. 6) Install screws, washers and processor protecting cover. 7) Protect bonding areas on protecting cover - refer to 20-00-12. 8) Make sure all the tools and materials are removed and the work area is clean and free from debris. 9) Close baggage compartment door 219. 10) Remove the warning sign prohibiting main switch-breaker operation. 11) Perform an operational test of the system. WA Validity : WX 500 34-41 Page 401 02 (BA) NOV 01 1 - Rack 2 - A74 processor 3 - Hold-down mechanism |
