S 864-006
 (1)  
Remove the DO-NOT-CLOSE tags and close the applicable circuit breakers that follows:

 (a)  
On the P6 main power distribution panel 1) 6H32, AIR SUPPLY CONT ENG 1 2) 6H33, AIR SUPPLY CONT ENG 2 3) 6H34, AIR SUPPLY CONT ENG 3 4) 6H35, AIR SUPPLY CONT ENG 4

 (b)  
On the P180 power distribution panel 1) 180J1, PACK 1 FLOW CONT VLV 2) 180J2, PACK 1 PROT 3) 180F1, PACK 2 FLOW CONT VLV 4) 180F2, PACK 2 PROT 5) 180J16, PACK 3 FLOW CONT VLV 6) 180J17, PACK 3 PROT

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A 747-400 MAINTENANCE MANUAL
 S 864-015
 (2)  Make sure that these circuit breakers are closed: (a) On the overhead circuit breaker panel, P7 1) 7F09, EIU L 2) 7F10, EIU C 3) 7F10, EIU R 4) 7F35, PACK TEMP CONT A 5) 7F36, PACK TEMP CONT B
 S 864-049
 (3)  Make sure that these switches are in the closed position: (a) L ISLN VALVE (b) R ISLN VALVE (c) APU VALVE
 S 864-050
 (4)  Make sure that all four ENGINE BLEED switches (on the P5 overhead panel) are in the OFF position.
 S 864-051
 (5)  Put all three PACK switches (on P5 overhead panel) to the OFF position.
 S 864-017
 (6)  Get access to the ECS, SUPPLY synoptics page to monitor the status of the test in progress. (a) Make sure that the L/R wing isolation valves and APU bleed air shutoff valve indicate closed and are white.
 (b) (c)  Make sure that all four engine bleed valves show OFF.Make sure that all three pack valves show OFF.
 S 744-009
 (7)  Start the APU (AMM 49-11-00/201). (a) Let the operation of the APU become stable.
 S 864-012
 (8)  Put APU VALVE switch on the P5 panel to the open position. (a) Make sure that the APU VALVE light on the bleed air control module comes on (amber) for a short time (for less than 10 seconds) and then go off. (b) Make sure that the APU bleed air valve is indicated open within 10 seconds on the ECS synoptics page.
 S 864-019
 (9)  Put APU VALVE switch on the P5 panel to the closed position. (a) Make sure that the APU VALVE light on the bleed air control module comes on (amber) for a short time (for less than 10 seconds) and then go off. (b) Make sure that the APU bleed air valve indicates closed within 10 seconds on the ECS synoptics page.

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A
747-400 MAINTENANCE MANUAL
 S 744-019
 (10)
 Shut down the APU (AMM 49-11-00/201).

 S 864-056

 (11)
 Put the L and R ISLN VALVE switches (one at a time) to the open position.

 (a)  
Make sure that the applicable L/R ISLN VALVE light on the bleed air control module comes on (amber) for a short time (for less than 10 seconds) and then go off.

 (b)  
Make sure that the applicable L/R isolation valve indicates open within 10 seconds on the ECS synoptics page.

 S 864-052
 (12)
 Put the L and R ISLN VALVE switches (one at a time) to the closed position.

 (a)  
Make sure that the applicable L/R ISLN VALVE light on the bleed air control module comes on (amber) for a short time (for less than 10 seconds) and then go off.

 (b)  
Make sure that the applicable L/R isolation valve indicates closed within 10 seconds on the ECS synoptics page.

 S 744-027
 (13) Get access to the CMCS input monitoring and enter these input codes
 and make sure that the applicable bits are set as follow: ~................................................................... |E/59/352/10 (Engine 1) | Make sure that bit 25 = 1, and bit 26 = 0;| ..................................................................... |E/59/352/01 (Engine 2) | Make sure that bit 25 = 1, and bit 26 = 0;| ..................................................................... |E/59/352/11 (Engine 3) | Make sure that bit 25 = 1, and bit 26 = 0;| ..................................................................... |E/59/352/00 (Engine 4) | Make sure that bit 25 = 1, and bit 26 = 0.| 2.......................…...........................................1
　
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