(b)
Check that L RECIRC FAN and R RECIRC FAN circuit breakers on overhead circuit breaker panel P11 are closed.
(c)
Check that L RECIRC FAN and R RECIRC FAN circuit breakers on miscellaneous electrical equipment panels (P70 and P37) are closed.
(d)
Press L RECIRC FAN and R RECIRC FAN switchlights to ON.
(3)
Failure Indication:
(a)
An amber INOP light illuminates and an EICAS advisory message L or R RECIR FAN appears for a faulty system as well as for the selection of the switch/light to the OFF position.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
21-25-00
ALL ú ú 06 Page 8 ú Dec 20/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
RECIRCULATION SYSTEM - ADJUSTMENT TEST
______________________________________
1. General_______
A. This procedure has instructions to do the operational test of the recirculation system.
TASK 21-25-00-715-001
2. Recirculation System Operational Test (Fig. 501)_____________________________________
A. References
(1)
06-41-00/201, Fuselage Access Doors and Panels
(2)
24-22-00/201, Electric Power-Control
B.
Access
(1)
Location Zones 121 Forward cargo compartment (Left) 126 Area aft of forward cargo compartment (Right)
(2)
Access Panels
193DL Conditioned Air Ground Service
C.
Prepare for the Test
S 865-003
(1)
Supply electrical power (Ref 24-22-00).
S 865-002
(2)
Make sure these circuit breakers, on the pilot's overhead circuit breaker panel, P11, are closed:
(a)
EICAS circuit breakers (6 locations)
(b)
11P14, RECIRC CARGO FIRE CONT LEFT
(c)
11P23, RECIRC CARGO FIRE CONT RIGHT
S 865-004
(3)
Make sure these circuit breakers, in the miscellaneous electrical equipment panel, P70, are closed:
(a)
70B16, L RECIRC FAN CONT
(b)
70C10, RECIRC FAN L
S 865-005
(4)
Make sure these circuit breakers, in the miscellaneous electrical equipment panel, P37, are closed:
(a)
37D7, R RECIRC FAN CONT
(b)
37J5, RECIRC FAN R
S 865-006
(5)
Push the L and R RECIRC FAN switch-lights, on the pilots' overhead panel, P5, to the off position.
(a)
Make sure the INOP lights come on.
S 865-007
(6)
Turn the L and R PACK selectors, on the P5 panel, to the OFF position.
(a)
Make sure the PACK OFF lights come on.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
21-25-00
ALL ú ú 03 Page 501 ú Jun 20/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
AIR CONDITIONING CONTROL MODULE
P11 PANEL SEE A EICAS MAINTENANCE PANELP5 PANEL
SEE C
P61 PANEL
MIX BAY
SEE D
P8 PANEL EQUIPMENTAPU/CARGO COOLING OVERBOARDFIRE CONTROL EXHAUST VALVEPANEL (LEFT SIDEWALL)
SEE B
SEE E
FLIGHT COMPARTMENT
INOP INOP INOP FWD CARGO FIRE AFT CARGO FIRE SWITCH/LIGHT SWITCH/LIGHT FLT DK FWD CAB AFT CAB AUTO AUTO AUTO
APU BTLARMED ARMED DISCH
A
FWD AFT C
RR
A
CCC
WWW
R
OFF OFF OFF
G O RECIRC FAN
1-BTL DISCH-2
TRIM AIR L R F
DISCH
APU
I
R ON ONON R
E
OFF INOP INOP
DISCH DISCH
A A
L PACK R PACK
RESET RESET
APU/CARGO FIRE CONTROL PANEL
INOP INOP B
PACK PACK ECS/MSG SWITCH
OFF OFF
AUTO AUTO
EICAS MAINT
OFF
N
EVENT
N OFF
DISPLAY SELECT AUTO MAN
READ
S S
ELECECS PERF
T
T B B MSG C C
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