(e)  
Put the L and R PACK control selectors, on the P5 panel, to AUTO. 1) Make sure the PACK OFF lights and the INOP lights, on the L

 and R PACK switch/lights, are not on. 2) Make sure the advisory messages L and R PACK OFF are not shown on the EICAS display. 3) Make sure the maintenance messages L or R PACK BITE are not shown on the EICAS display.
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757 FAULT ISOLATION/MAINT MANUAL
COOLING PACK
COMPONENT QTY  ACCESS/AREA  REFERENCE 
CARD - FLOW CONTROL 2  119BL, MAIN EQUIP CTR, P50  21-51-09 
CIRCUIT BREAKERS  1  FLT COMPT, P11 
CONT - LEFT PACK AUTO, C702 1  11M11; 11A131 2  * 
CONT - LEFT PACK FLOW, C653 1  11M13; 11A141 2  *
 CONT - LEFT PACK STANDBY, C4037 1  11M25; 11A261 2  *
 CONT - RIGHT PACK AUTO, C703  1  11M20; 11A281 2  *
 CONT - RIGHT PACK FLOW, C704 1  11M22; 11A291 2  *
 CONT - RIGHT PACK STANDBY, C4039 1  11M16; 11A151 2  *
 PWR - LEFT PACK AUTO, C673 1  11M10; 11M111 2  *
 PWR - LEFT PACK STANDBY, C4036 1  11M24  *
 PWR - RIGHT PACK AUTO, C674  1  11M19  *
 PWR - RIGHT PACK STANDBY, C4038 1  11M15  *
CONDENSER  2  119BL, MAIN EQUIP CTR, E3  21-51-10 
CONTROLLER - PACK STANDBY 1  119BL, MAIN EQUIP CTR, E3  21-51-14 
CONTROLLER - PACK TEMPERATURE  2  21-51-14 
EXCHANGER - HEAT  4  193HL, 194ER  21-51-02 
EXTRACTOR - WATER  2  193HL, 194ER  21-51-04 
FAN/AIR PLENUM/DIFFUSER  2  193HL, 194ER  21-51-16 
MACHINE - AIR CYCLE  2  193HL, 194ER  21-51-03 
REHEATER - PACK  2  193HL, 194ER  21-51-07 
RELAYS - (REF 31-01-36, FIG. 101) 
L PACK AUTO/MAN 1, K57  1  * 
L PACK AUTO/MAN 2, K58 1  *
 L PACK AUTO/MAN 3, K10315 1  *
 L PACK EXIT DOOR CLOSE MAN, K60 1  *
 L PACK EXIT DOOR OPEN MAN, K59  1  *
 L PACK INLET DOOR CLOSE MAN, K62 1  *
 L PACK INLET DOOR OPEN MAN, K61 1  *
 L PACK LOW LIMIT VALVE, K10317 1  *
 L PACK TEMP CONT VALVE CLOSE MAN, K64 1  *
 L PACK TEMP CONT VALVE OPEN MAN, K63 1  *
RELAYS - (REF 31-01-07, FIG. 101)
 R PACK AUTO/MAN 1, K49  1  *
 R PACK AUTO/MAN 2, K50 1  *
 R PACK AUTO/MAN 3, K10316 1  *
 R PACK EXIT DOOR CLOSE MAN, K52 1  *
 R PACK EXIT DOOR OPEN MAN, K51 1  *
 R PACK INLET DOOR CLOSE MAN, K54 1  *
 R PACK INLET DOOR OPEN MAN, K53 1  *
 R PACK LOW LIMIT VALVE, K10318 1  *
 R PACK TEMP CONT VALVE CLOSE MAN, K56 1  *
 R PACK TEMP CONT VALVE OPEN MAN, K55 1  * 
SENSOR - COMPRESSOR OUTLET  2  193HL, 194ER  25-51-06 
SENSOR - PACK TEMPERATURE  2  193HL, 194ER  21-51-08 
SWITCH - ALTITUDE  1  193HL  21-51-17 
SWITCH - COMPRESSOR OUTLET OVERHEAT  2  193HL, 194ER  21-51-05 
SWITCH - PACK OVERHEAT  2  193HL, 194ER  21-51-18 
VALVE - CABIN AIR SUPPLY CHECK  2  193HL, 194ER  21-51-15 
VALVE - FLOW CONTROL AND SHUTOFF  2  193HL, 194ER  21-51-01 
VALVE - PACK LOW LIMIT CONTROL  2  193HL, 194ER  21-51-11 
VALVE - PACK TEMPERATURE CONTROL  2  193HL, 194ER  21-51-12 
GUN 001-005
GUN 006-999

* SEE WM EQUIPMENT LIST

Component Index
Figure 101

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757 FAULT ISOLATION/MAINT MANUAL
　
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