(a)  
Otherwise, refer to WDM 21-51-11, WDM 21-51-12, and
 WDM 21-51-13 to do the appropriate continuity checks.

 S 864-022
 (34)
 Put each of the PACK switches on the P5 panel to the "A" position, one at a time.

 S 744-023

 (35)
 On airplanes equipped with S210U130-41 or -101 or newer PTCs, get access to the CMCS input monitoring to enter these input codes and to make sure that the bits are as follow: ~.................................................................. |E/5/35710 | Make sure that: | | | bits 14-19 = 0; bits 20-22 = 1; and bits 23-25 = 0; | .................................................................... |E/41/35710 | Make sure that: | | | bits 14-19 = 0; bits 20-22 = 1; and bits 23-25 = 0. | 2...........…......................................................1

 (a)  
Otherwise, refer to WDM 21-51-11, WDM 21-51-12, and
 WDM 21-51-13 to do the appropriate continuity checks.

 S 864-024
 (36) Put each of the PACK switches on the P5 panel to the "B" position, one at a time.
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747-400 MAINTENANCE MANUAL
 S 744-025
 (37)
 On airplanes equipped with S210U130-41 or -101 or newer PTCs, get access to the CMCS input monitoring to enter these input codes and to make sure that the bits are as follow: ~................................................................ |E/5/35710 | Make sure that bits 14-22 = 0, and bits 23-25 = 1;| .................................................................. |E/41/35710 | Make sure that bits 14-22 = 0, and bits 23-25 = 1.| 2...........…....................................................1

 (a)  
Otherwise, refer to WDM 21-51-11, WDM 21-51-12, and WDM 21-51-13 to do the appropriate continuity checks.

 S 214-026
 (38)
 Make sure that no bleed air is supplied to the air conditioning packs.

 S 864-053

 (39)
 Open the applicable circuit breaker that follows and attach a DO-NOT-CLOSE tag:

 (a)  
On the overhead circuit breaker panel, P7
 1) 7F35, PACK TEMP CONT A
 2) 7F36, PACK TEMP CONT B

 S 034-048
 (40)
 Disconnect the electrical connectors for the Pack 1, 2, and 3 flow control valves, DV93, DV95, and DV96, respectively.

 S 214-044

 (41)
 Make sure that the voltage across pins 3 and 4 on each flow control valve connector (DV93, DV94, and DV95) is between 0 and 6 VDC.

 S 864-046

 (42)
 Put each of the PACK switches on the P5 panel to the "OFF" position, one at a time.

 S 214-045

 (43)
 Make sure that the voltage across pins 3 and 4 on each flow control valve connector (DV93, DV94, and DV95) is between 25 and 31 VDC.

 E. Put the Airplane Back to Its Usual Condition
 S 434-047
 (1)  Connect the electrical connectors for Pack 1, 2, and 3 flow control valves, DV93, DV95, and DV96, respectively.
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 (2)  S 864-055Remove the DO-NOT-CLOSE tags and close the applicable circuit breakers that follows: (a) On the overhead circuit breaker panel, P7 1) 7F35, PACK TEMP CONT A 2) 7F36, PACK TEMP CONT B
 (3)  S 864-008Remove electrical power if it is not necessary (AMM 24-22-00/201).

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