FLIGHT DECK
ZONE

FORWARD PASSENGER CABIN ZONE AFT PASSENGER CABIN ZONE
TO FLIGHT DECK
CONDITIONED AIR
DISTRIBUTION

TRIM AIR
FWD CARGO COMPARTMENT AIR CONDITIONING MIX BAY AFT CARGO COMPARTMENT
MODULATING
VALVES

MIX
FROM RIGHTMANIFOLD PACK TRIM AIR PRESS FROM LEFT REGULATION VALVE PACK
FROM L RECIRC SYSTEM
FROM R RECIRC SYSTEM
ZONE TRIM AIR
CONDITIONED
AIR GROUND
CONNECTOR

CONDITIONED AIR DISTRIBUTION
PSUGASPER OUTLET
PASSENGER CABIN
DEFOG AIR
SYSTEM
INDIVIDUAL
AIR OUTLETS (4)

CARGO COMPARTMENTFLIGHT DECK AIRFLOWSHOULDER
AIR HEATERS (2)SIDEWALLOUTLETS (4) AFT ZONE FOOT HEATER
FLIGHT DECK CONDITIONED
PANELS (4)
AIR DISTRIBUTION
PASSENGER CABIN AIRFLOW
CONDITIONED AIR
FWD ZONE PASSENGER CABIN CONDITIONED
COLD AIRAIR DISTRIBUTION

HOT AIR
Conditioned Air Distribution
Figure 1 (Sheet 1)

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 21-23-00
 ú ú 10 Page 2 ú Jan 28/02
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A
757
MAINTENANCE MANUAL

FLIGHT DECK
ZONE

FORWARD PASSENGER CABIN ZONE AFT PASSENGER CABIN ZONE
TO FLIGHT DECK
CONDITIONED AIR
DISTRIBUTION

TRIM AIR
FWD CARGO COMPARTMENT
AIR CONDITIONING MIX BAY AFT CARGO COMPARTMENT
MODULATINGVALVES
MIX
FROM RIGHT
MANIFOLD
PACK
TRIM AIR PRESSFROM LEFT REGULATION VALVE PACK
FROM L RECIRC SYSTEM
FROM R RECIRC SYSTEM
ZONE TRIM AIR
CONDITIONED
AIR GROUND
CONNECTOR

CONDITIONED AIR DISTRIBUTION
PSUGASPER OUTLET
PASSENGER CABIN
DEFOG AIR
SYSTEM
INDIVIDUAL
AIR OUTLETS (4)

CARGO COMPARTMENT
FLIGHT DECK AIRFLOW
SHOULDER
AIR HEATERS (2)
SIDEWALL

AFT ZONE
OUTLETS (4)
FOOT HEATER
FLIGHT DECK CONDITIONED
PANELS (4)
AIR DISTRIBUTION
PASSENGER CABIN AIRFLOW
CONDITIONED AIR
FWD ZONE PASSENGER CABIN CONDITIONED
AIR DISTRIBUTION
COLD AIR
HOT AIR
Conditioned Air Distribution
Figure 1 (Sheet 2)

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 GUN 001-004 WITH SB 21-51;  ú 21-23-00
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A

757
MAINTENANCE MANUAL

 (2)  
Sidewall Outlets

 (a)  
The sidewall outlets consist of an air deflector inside a housing. The housing and air deflector disperse the air flow as it enters the passenger compartment.

 (3)  
Galley and Lavatory Outlets

 (a)  
Separate adjustable outlets provide conditioned air to galley areas and non-adjustable gasper outlets provide conditioned air to each lavatory.

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 ALL  ú ú 09 Page 4 ú Jan 28/02
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A
757 MAINTENANCE MANUAL
 AIR CONDITIONING SYSTEM DUCTS - REPAIRS
_______________________________________
 1.  General_______
 A.  This procedure gives instructions for the repair of the following types of air conditioning ducts:
 (1)  
Fiberglass or Kevlar Duct (Fig. 201)

 (a)  
Taped Joint Repair

 (b)  
External Patch Repair

 (c)  
Structural Repair

 (2)  
Polyurethane Foam Duct (Fig. 202)

 (a)  
Taped Joint Repair

 (b)  
Duct End Repair

 (c)  
External Patch Repair

 (d)  
Structural Repair

 (e)  
Inner Lining Repair

 (f)  
　
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