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Engine 3 474AL Trailing Edge Fairing Doors - Engine 3 482FL Access Door, Mid Lower Strut Aft - Engine 4 482ER Access Door, Forward Lower Midspar Presure Relief -
Engine 4 482GR Access Door, Aft Lower Midspar Pressure Relief -Engine 4 484AL Trailing Edge Fairing Doors - Engine 4
 G. Leakage Test of the Pneumatic Ducts Downstream of the PRSOV
 S 015-026
 (1) Remove these section 42 wing/body fairings (AMM 06-09-02/201):
 -191AJ
 -192AJ.
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747-400 MAINTENANCE MANUAL
 S 015-027
 (2)  Open (or remove, as applicable) these section 44 access doors and panels (AMM 06-09-03/201):
 -191BL
 -191CL and 192CR
 -191EL
 -191JL
 -191KL and 192KR
 -191ML and 192MR
 -191NL and 192NR
 -192HR.
 S 015-028
 (3)  Open these strut access panels (AMM 06-09-09/201):
 -452ER, 452FL, and 452GR
 -462FL and 462HL
 -472FL and 472HL
 -482ER, 482FL, and 482GR.
 S 865-031
 (4)  
Supply the electrical power (AMM 24-22-00/201).

 S 865-032

 (5)  
Make sure these circuit breakers are closed:

 (a)  
On the main power distribution panel, P6:
 1) 6C08, WING ANTI-ICE VLV
 2) 6C09, WING ANTI-ICE CONT
 3) 6F19, PILOTS MISC IND 1
 4) 6F20, PILOTS MISC IND 2
 5) 6F28, ZONE TEMP CONT AC
 6) 6F29, ZONE TEMP CONT DC
 7) 6F33, PACK TEMP CONT AC-A
 8) 6F34, PACK TEMP CONT AC-B
 9) 6F35, PACK TEMP CONT DC-A
 10) 6F36, PACK TEMP CONT DC-B
 11) 6H20, L ISO VLV AIR SUPPLY PWR
 12) 6H22, APU ISO VLV AIR SUPPLY PWR
 13) 6H24, R ISO VLV AIR SUPPLY PWR
 14) 6H32, ENG 1 AIR SUPPLY CONT
 15) 6H33, ENG 2 AIR SUPPLY CONT
 16) 6H34, ENG 3 AIR SUPPLY CONT
 17) 6H35, ENG 4 AIR SUPPLY CONT
 18) 6H36, APU VLV AIR SUPPLY CONT
 19) 6J10, NACELLE ANTI-ICE 1
 20) 6J11, NACELLE ANTI-ICE 2
 21) 6J12, NACELLE ANTI-ICE 3
 22) 6J13, NACELLE ANTI-ICE 4

 (b)  
On the overhead circuit breaker panel, P7:
 1) 7F09, EIU L
 2) 7F10, EIU C

 

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747-400 MAINTENANCE MANUAL
 3) 7F15, EIU R
 4) 7H09, CARGO HEAT AFT

 (c)  
On the DC power distribution panel, P180:
 1) 180F01, FLOW CONT VLV PACK 2
 2) 180F27, ALTN TEMP CONT
 3) 180J01, FLOW CONT VLV PACK 1
 4) 180J16, FLOW CONT VLV PACK 3

 (d)  
On the main power distribution panel, P414:
 1) 414A12, FLT DK MANUAL TEMP CONT
 2) 414B14, ALTN TEMP CONT PWR L

 (e)  
On the main power distribution panel, P415:
 1) 415B27, ALTN TEMP CONT ZN A
 2) 415B28, ALTN TEMP CONT PWR R
 3) 415E32, ACM MASS FLOW IND

 

 S 865-033
 (6)  
Open these circuit breakers:

 (a)  
On the main power distribution panel, P6:
 1) 6H22, APU ISO VLV AIR SUPPLY PWR
 2) 6H36, APU VLV AIR SUPPLY CONT

 (b)  
On the overhead circuit breaker Panel, P7:
 1) 7H09, CARGO HEAT AFT
 2) 7J01, HYD DEMAND 1
 3) 7H01, HYD DEMAND 2
 4) 7G01, HYD DEMAND 3
 5) 7F01, HYD DEMAND 4

 

 S 865-034
 (7)  
Put these switches on the P5 overhead panel in the OFF position:

 (a)  
AFT CARGO HT

 (b)  
WING ANTI-ICE

 S 865-035
 (8)  
Put these switches on the P5 overhead panel in the open position:

 (a)  
L ISLN

 (b)  
　
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