(2)
AMM 49-31-93/401, Fuel Sensing Flow Control Check Valve
(3)
AMM 49-51-22/401, Cooling Air Shutoff Valve Pneumatic Line Filter
B. Access
(1)
Location Zones
101 Control Cabin (Left)
205 Electronic Compartment
701 Tail Compartment
703 APU Compartment
(2)
Access Panels
1201 Electronic Equipment Access Door
3701 Stabilizer Trim Access Door
3804 APU Cowl Door
C. Procedure
S 034-002
(1) Remove the upper shroud (AMM 49-12-31/401).
NOTE: The bleed air duct is disconnected from the upper shroud and
____ the bleed air valve during the upper shroud removal.
S 034-003
(2)
Disconnect the pressure line for the pneumatic actuator from the reducer.
S 034-004
(3)
Remove the bleed air line:
(a)
Disconnect the bleed air line from the check valve for the fuel sensing flow control.
(b)
Remove the bleed air line.
(4)
Carefully remove the bleed air duct from the APU compartment.
S 034-006
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49-52-13
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES /MAINTENANCE MANUAL ////////////////////////
UPPER SHROUD
FWD
BLEED AIR DUCT
SEE A ACTUATOR PRESSURE LINE TO THE PNEUMATIC A SEE B VALVE BLEED AIR
REDUCER
PNEUMATIC LINE FILTER BLEED AIR LINE
BLEED AIR DUCT
CONTROL FUEL SENSING FLOW CHECK VALVE FOR THE
FWD
B
Bleed Air Duct Installation
Figure 401
F38367
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49-52-13
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
S 034-005
(5) If the bleed air duct will be replaced, remove these parts:
(a)
Remove the pneumatic line filter for the cooling air shutoff valve (AMM 49-51-22/401).
(b)
Remove the check valve for the fuel sensing flow control (AMM 49-31-93/401).
TASK 49-52-13-404-007
3. Bleed Air Duct Installation (Fig. 401)
___________________________
A. References
(1)
AMM 49-12-31/401, Upper Shroud
(2)
AMM 49-31-93/401, Fuel Sensing Flow Control Check Valve
(3)
AMM 49-51-22/401, Cooling Air Shutoff Valve Pneumatic Line Filter
B. Access
(1)
Location Zones
101 Control Cabin (Left)
205 Electronic Compartment
701 Tail Compartment
703 APU Compartment
(2)
Access Panels
1201 Electronic Equipment Access Door
3701 Stabilizer Trim Access Door
3804 APU Cowl Door
C. Procedure
S 434-010
(1) If a new bleed air duct will be installed, install these parts:
(a) Install the check valve for the fuel sensing flow control (AMM 49-31-93/401).
NOTE: Do not connect the bleed air line to the check valve at
____
this time.
(b) Install the pneumatic line filter for the cooling air shutoff valve (AMM 49-51-22/401).
NOTE: Do not connect the pressure line for the pneumatic
____ actuator to the reducer at this time.
S 424-012
(2) Install the bleed air duct and temporarily secure bleed air duct to the APU compartment.
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