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A
747-400
MAINTENANCE MANUAL
(d) Make two sleeves (aluminum or titanium) which are 6 inches (152 mm) in length.
NOTE: Use an aluminum sleeve when you repair an aluminum heat
____ duct. Use a titanium sleeve when you repair a composite heat duct. The sleeve diameter must be larger than the heat duct diameter.
(e) Install the replacement heat duct and the sleeves as shown in Figure 801.
NOTE: Make sure the heat outlet holes are on the top of the
____
duct when the sleeve is installed.
The pressure is low in the heat duct. Air leakage at duct repair joint is permitted.
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747-400 FAULT ISOLATION/MAINT MANUAL
COOLING
COMPONENT FIG. 102 SHT QTY ACCESS/AREA REFERENCE AMM
ASPIRATOR - WATER 4 3 191EL,191NL,192ER, AIR COND 21-51-11
ACCESS DOORS/PANELS
BULB -
COMPRESSOR DISCHARGE TEMP, T479,T481,483 3 3 191AL,191HL,192AR, AIR COND 21-51-19
ACCESS DOORS/PANELS
CARD - EQUIP COOLING, YMLA15 1 1 117AL, MAIN EQUIP CTR, M7603 21-58-05
ELEC SYS CARD FILE FWD
CLEANER - EQUIP COOLING AIR 7 1 FWD CARGO COMPT, LEFT 21-58-10
COLLECTOR - WATER 5 3 191HL,191NL,192HR, AIR COND 21-51-25
ACCESS DOORS
CONDITIONER - AIRFLOW SIGNAL, M594 3 1 WING LDG GEAR WELL, RIGHT 21-51-17
DETECTOR - (FIM 26-16-00/101)
EQUIPMENT COOLING SMOKE, M7931 7 1 FWD CARGO COMPT, LEFT 26-16-51
DETECTOR - LOW FLOW, FLT DECK, M7933 6 1 FLT COMPT CEILING 21-58-02
DETECTOR - LOW FLOW, MAIN E/E RACK, M7934 6 1 117AL, MAIN EQUIP CTR 21-58-02
DIFFUSER - FAN/INLET HOUSING 3 3 191HL,191AL,192AR, AIR COND 21-51-07
ACCESS DOORS
EXCHANGER - HEAT 3 3 191EL,191ML,192ER, AIR COND 21-51-03
ACCESS DOORS
FAN - EQUIP COOLING EXHAUST, B7437 8 1 FWD CARGO COMPT, RIGHT 21-58-01
FAN - EQUIP COOLING SUPPLY, B7436 7 1 FWD CARGO COMPT, LEFT 21-58-01
FAN - PRIMARY AFT EQUIP COOLING, B8599 9 1 AFT OF BULK CARGO COMPT, LEFT 21-58-01
FAN - SECONDARY AFT EQUIP COOLING, B8598 9 1 AFT OF BULK CARGO COMPT, LEFT 21-58-01
FILTER - FLOW CONTROL AND SHUTOFF VALVE 4 6 191NL,191HL,192HR, AIR COND 21-51-13
ACCESS DOORS
MACHINE - AIR CYCLE (ACM) 3 3 191HL,191AL,192AR, AIR COND 21-51-04
ACCESS DOORS
MODULE - BLEED AIR CONTROL, M7328 1 1 FLT COMPT, P5 *
MODULE - CABIN TEMP, M7329 1 1 FLT COMPT, P5 *
SCREEN - RAM AIR SYSTEM 3 3 191AL,192AR,191HL, AIR COND 21-51-15
ACCESS DOORS
SENSOR - PACK AIRFLOW, T423,T424,T425 4 3 WING LDG GEAR WELL 21-51-16
SEPARATOR - WATER 4 3 191NL,192HR, AIR COND ACCESS 21-51-05
DOORS
SWITCH - COMPRESSOR DISCHARGE OVERHEAT, S520, 3 3 191HL,191AL,192AR, AIR COND 21-51-09
S517,S522 ACCESS DOORS/PANELS
SWITCH - EQUIP COOL DIFF PRESS, S1981 6 1 117AL, MAIN EQUIP CTR 21-58-09
SWITCH - EQUIP COOL OVHT, S1977 7 1 FWD CARGO COMPT, LEFT 21-58-08
SWITCH - EQUIP COOL MODE, S1 1 1 FLT COMPT, P5, CABIN TEMP *
CONTROL MODULE, M7324
SWITCH - PACK 1, S8 1 1 FLT COMPT, P5, BLEED AIR CONT *
MODULE, M7328
SWITCH - PACK 2, S9 1 1 FLT COMPT, P5, BLEED AIR CONT *
MODULE, M7328
SWITCH - PACK 3, S10 1 1 FLT COMPT, P5, BLEED AIR CONT *
MODULE, M7328
SWITCH - PACK DISCHARGE OVERHEAT, S519,S518, 4 3 191NL,192HR, AIR COND ACCESS 21-51-08
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