(d)  
11S36, FIRE DET FAN PWR or CARGO SMK BLO

 S 755-151
 (4)  Make sure these circuit breakers on the miscellaneous relay panel, P70, are closed:
 (a)  
70B10, SMOKE DET BLOWER 1

 (b)  
70B11, SMOKE DET BLOWER 2

 (c)  
70B12, SMOKE DET BLOWER 3

 (d)  
70B13, SMOKE DET BLOWER 4

 S 865-194
 (5)  Push the ECS MSG switch on the EICAS MAINT panel on the right side panel, P61.
 E.  Do a Test of the Forward Blowers, Control Relay, and Plenum Pressure Switch
 S 755-103
 (1)  
Make sure the EICAS maintenance message FWD DET FAN does not show on the bottom display.

 S 865-104

 (2)  
Open this circuit breaker on the P70 panel to stop the operation of blower (M10462):

 (a)  70B10, SMOKE DET BLOWER 1
 S 865-110
 (3)  ON GUN 001-003 WITHOUT SL 26-9A; After 10 to 15 seconds, make sure the EICAS message FWD DET FAN shows on the bottom display. This is an indication that the plenum pressure switch and the control relay have operated.
 NOTE: The EICAS maintenance message, CARGO DET AIR, may appear
____
 momentarily.

 (a)  Push the STATUS switch on the EICAS DISPLAY select panel on the forward electronics panel, P9.
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757
MAINTENANCE MANUAL

 (b)  Ten to 40 seconds after the circuit breaker is opened, make sure the EICAS message CARGO DET AIR does not show on the bottom display. This is an indication that the forward blower 2 (M10463) operates.
 S 865-117
 (4)  ON GUN 004-999 AND AIRPLANES WITH SL 26-9A;
 After 60 to 90 seconds, make sure these indications occur:

 (a)  The EICAS message FWD DET FAN shows on the bottom display. This indicates that the plenum pressure switch and control relay have operated.
 NOTE: The EICAS status message, CARGO DET AIR, may appear
____
 momentarily.

 (b)  
Push the STATUS switch on the EICAS DISPLAY select panel on the forward electronics panel, P9.

 (c)  
The EICAS message CARGO DET AIR does not show on the bottom display. This indicates that the forward blower 2 (M10463) operates.

 S 865-120
 (5)  Open this circuit breaker on the P70 panel to stop the operation of blower 2 (M10463).
 (a)  70B11, SMOKE DET BLOWER 2
 S 755-121
 (6)  
Make sure the EICAS messages CARGO DET AIR and FWD DET FAN show on the bottom display.

 S 865-122

 (7)  
Close these circuit breakers on the P70 panel:

 (a)  
70B10, SMOKE DET BLOWER 1

 (b)  
70B11, SMOKE DET BLOWER 2

 S 865-123
 (8)  Open for 1 second, and then close these circuit breakers on the P11 panel to set system:
 (a)  11S35, FIRE DET CARGO CONT or CARGO SMOKE BLOWER CONT
 S 755-124
 (9)  Make sure that within 90 seconds, the EICAS message FWD DET FAN or CARGO DET AIR does not show on the bottom display. This indicates that the forward blower 1 (M10462) operates.
 F. Do a Test of the Aft Blowers, Control Relay, and Plenum Pressure Switch
 S 755-125
 (1)  Make sure the EICAS maintenance message AFT DET FAN does not show on the bottom display.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 ALL  ú ú 12 Page 514 ú May 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 757 MAINTENANCE MANUAL
 S 865-126
 (2)  Open this circuit breaker on the P70 panel to stop the operation of blower 3 (M10464). (a) 70B12, SMOKE DET BLOWER 3
 S 755-132
 (3)  ON GUN 001-003 WITHOUT SL 26-9A; After 10 to 40 seconds, make sure these indications occur: (a) The EICAS message AFT DET FAN shows on the bottom display. This is an indication plenum pressure switch and control relay have operated. (b) The EICAS message CARGO DET AIR does not show on the bottom display. This is an indication that the aft blower 4 (M10465) operates.
　
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