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757
MAINTENANCE MANUAL
(b) L (R) RAM IN DOOR is less than 0.07.
NOTE:____ This indicates that the left (right) ram air inlet
door is open (less than 7% closed).
(c) TRIM VALVES (FLT DK, FWD, and AFT) are less than 0.07.
NOTE:____ This indicates that the trim air modulating valves are
closed (less than 7% open).
S 865-409
(15)
Set these switches and selectors on the air conditioning control panel, P5:
(a)
Set the L (R) RECIRC FAN switches to ON.
(b)
Set the temperature selectors (FLT DK, FWD CAB, and AFT CAB) on the P5 panel to AUTO C (8:00 o'clock position).
S 215-201
(16)
Look at the position indicators on the left and right low limit valves.
(a)
Make sure the low limit valves are closed.
S 215-202
(17)
Look at the position indicators on the left and right flow control valves.
(a)
Make sure the flow control valves are closed.
S 975-203
(18) Measure the air velocity at the inlet grille to the temperature sensors for the flight deck, the forward zone, and the aft zone.
NOTE: If you do not have an air velocity meter, then you can
____ use a 4 inch x 4 inch single ply tissue. If the inlet grille can hold the tissue, then the air flow is acceptable.
(a) If the air velocity is less than 150 feet/minute, then do these steps: 1) Make sure the fan for the temperature sensor module
operates. 2) Make sure the inlet filter is not clogged.
S 865-411
(19)
Set the ISOLATION VALVE switch on the P5 panel to ON.
S 865-205
(20)
Start and operate the APU (AMM 49-11-00/201) or supply pneumaticpower with a ground source (36-00-00/201).
(21)
Set the APU BLEED AIR switch to ON.
S 865-413
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757 MAINTENANCE MANUAL
S 215-206
(22)
Make sure the L (R) DUCT PRESS gage on the P5 panel shows the pressure increases to 35 +/- 5 psi.
S 865-415
(23)
Move the TRIM AIR switch on the P5 overhead panel to ON.
(a)
Make sure the zone INOP lights on the P5 panel go off.
S 045-209
WARNING: DO THE DEACTIVATION PROCEDURE FOR THE SPOILERS OR MOVE ALL
_______ PERSONS AND EQUIPMENT AWAY FROM THE SPOILERS. THE SPOILERS CAN MOVE QUICKLY AND CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
(24) Do the deactivation procedure for the spoilers (AMM 27-61-00/201) or move all persons and equipment away from the control surfaces.
S 865-210
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.
(25)
Put the air/ground relay system in the air mode (AMM 32-09-02/201).
S 715-211
(26)
Move the L (R) pack selector on the P5 panel to AUTO.
(a)
Make sure the L (R) PACK OFF light on the P5 panel goes off.
(b)
Look at the L (R) PACK OUT temperature on the ECS maintenance page. 1) Make sure the temperature decreases.
S 215-212
(27)
Look at the position indicator on the flow control valve.
(a)
Make sure the valve moves to the open position.
S 215-213
(28)
Make sure there is air flow at the ram air exhaust.
E.
Flight Deck Zone (AUTO Mode)
S 715-214
(1)
Move the FLT DK temperature selector on the P5 panel to AUTO W (4:00 position).
(a)
The FLT DECK DUCT TEMP display will increase, but will not exceed 77 deg. C (170 deg. F).
(b)
The FLT DECK TRIM VALVE display on the ECS maintenance page will show the trim air modulating valve move to the open position (0.90-1.00).
