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21-51-00
ALL ú ú 11 Page 515 ú Jan 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
21-51-00
ALL ú ú 13 Page 516 ú May 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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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