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 (a)  Overhead Circuit Breaker Panel, P11: 1) 11M10, LEFT PACK AUTO POWER 2) 11M11, LEFT PACK AUTO CONT 3) 11M13, LEFT PACK FLOW CONT 4) 11M15, RIGHT PACK STANDBY POWER 5) 11M16, RIGHT PACK STANDBY CONT 6) 11M19, RIGHT PACK AUTO POWER 7) 11M20, RIGHT PACK AUTO CONT 8) 11M22, RIGHT PACK FLOW CONT 9) 11M24, LEFT PACK STANDBY POWER 10) 11M25, LEFT PACK STANDBY CONT
 S 865-247
 (3)  Use an external power source or use two or more internal power sources (L IDG, R IDG, and APU) to supply the electrical power (AMM 24-22-00/201).
 NOTE:____ If only one internal power source is used, the utility busses will shed when flight mode is simulated. The recirculation fans will shut down.
 S 865-248
 (4)  Supply pneumatic power with the APU or a ground air source (AMM 36-00-00/201).
 S 865-249
 (5)  If the pneumatic source is the APU or ground air, then open these circuit breakers and attach DO-NOT-CLOSE tags: (a) On the overhead circuit breaker panel, P11: 1) 11Q22, APU POWER 2) 11Q10, L ENG BLEED
 S 865-250
 (6)  Push the L and R RECIRC FAN switch-lights, on the overhead control panel, P5, to ON. (a) Make sure the ON light comes on.
 S 865-251
 (7)  Turn the L and R PACK selectors, on the P5 panel, to the AUTO position.

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A
757 MAINTENANCE MANUAL
 S 715-252
 (8)  Do these steps on the Flight Management Computer (FMC) to bring up the ANALOG DISCR page 1/2.
 NOTE: The FMC will be used during this procedure to view the
____ ECS PACK H/L indication. The ECS PACK H/L indication shows the pack flow mode (High flow or Low flow).
 (a)  
Push the function mode key UNIT REF, just below the FMC.

 (b)  
Push the line select key adjacent to the INDEX prompt shown on the FMC.

 (c)  
Push the line select key adjacent to the MAINT prompt shown on the FMC.

 (d)  
Push the line select key adjacent to the DISCRETES prompt shown on the FMC.

 (e)  
Use the ECS PACK H/L (High flow/Low flow) line entry on the ANALOG DISCR page in place of the PACK FLOW indications on EICAS.

 (f)  
Make sure the LEFT and RIGHT ECS PACK H/L entries on the ANALOG DISCR page show LO (Low flow).

 S 015-253
 (9)  Open the applicable ECS access door (left or right), 193HL or 194ER (AMM 06-41-00/201).
 S 865-452
 WARNING: DO THE DEACTIVATION PROCEDURE FOR THE SPOILERS OR MOVE ALL
_______ PERSONS AND EQUIPMENT AWAY FROM THE SPOILER PANELS. THE SPOILERS CAN RETRACT QUICKLY AND CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (10)
 Do the deactivation procedure for the spoilers (AMM 27-61-00/201) or move all persons and equipment away from the spoiler panels.

 (11)
 Put the air/ground relay system in the air mode (AMM 32-09-02/201).

 S 865-553

 (12)
 For the left and the right engine, simulate an engine run (AMM 77-12-03/201).

 S 715-260

 (13)
 Make a temporary mark on the visual position indicator to show the current position of the FCV (Low Flow).

 S 865-255
 WARNING:_______ OBEY THE PROCEDURE THAT PUTS THE AIRPLANE IN THE AIR MODE.  IF
 YOU DO THE PROCEDURE INCORRECTLY, INJURIES TO PERSONS AND
 DAMAGE TO EQUIPMENT CAN OCCUR.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 
MAINTENANCE MANUAL
 E.  Do The Pack High FLow Inhibit Test
 NOTE: This test can only be done on one pack at a time. Do the____
 test on the left pack, then do the test on the right pack. The
 steps in parentheses are for the test on the right pack.
 ú
 ú  S 715-261
 ú  (1) Turn the L (R) PACK selector, on the P5 panel, to the OFF position.
 ú  (a) Make sure the L (R) PACK OFF light comes on.
　
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