49-52-41
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////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES /MAINTENANCE MANUAL ////////////////////////
SHROUD UPPER CONNECTOR ELECTRICAL SEE A FWD
VALVE SURGE BLEED SEE B
A 1
SHROUD UPPER
CONNECTOR ELECTRICAL
LOCKWIRE PLENUM TURBINE
VALVE SURGE BLEED SEE B VALVE BLEED SURGE
A 2 PACKING SCREW WASHER
2 1 AIRPLANES WITHOUT THE ETC AIRPLANES WITH THE ETC B
Surge Bleed Valve Installation Figure 401
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(b) Remove the lower shroud.
S 024-005
(4) Remove the surge bleed valve:
(a)
Disconnect the electrical connector from the surge bleed valve.
(b)
Remove the two screws and the washers that attach the surge bleed valve to the turbine plenum.
(c)
Remove the surge bleed valve and the packing. 1) Discard the packing.
TASK 49-52-41-404-006
3. Surge Bleed Valve Installation (Fig. 401)
______________________________
A. References
(1) IPC 49-50-00 Fig. 2
B. Access
(1)
Location Zones
101 Flight Compartment, LH
205 Electronic Compartment
703 APU Compartment
(2)
Access Panels
1201 Electronic Equipment Access Door
3804 APU Cowl Door
C. Procedure
S 424-007
(1) Install the surge bleed valve:
(a)
Install the new packing in the groove on the surge bleed valve.
(b)
Attach the surge bleed valve to the turbine plenum with the two screws and the washers. 1) Tighten the screws to 20-26 pound-inches
(2.3-3.0 newton-meters). 2) Install lockwire to the screws.
(c)
Connect the electrical connector to the surge bleed valve.
S 414-008
CAUTION: KEEP A MINIMUM CLEARANCE OF 0.18 INCHES (5 MM) BETWEEN THE
_______ ENGINE, THE FIRE DETECTOR, THE CLAMPS, AND THE LOWER SHROUD.
BE CAREFUL WHEN YOU MOVE THE LOWER SHROUD. DAMAGE TO THE SHROUD DRAIN LINES CAN OCCUR.
(2) Install the lower shroud:
(a)
Hold the lower shroud against the upper shroud.
(b)
Close the shroud latches.
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S 414-009
(3) Close the APU cowl door: (a) Disconnect the door support rods. (b) Put the door support rods in the clips on the APU cowl door. (c) Close the APU cowl door. (d) Close the latches for the APU cowl door.
S 864-010
(4) Set the circuit breaker and the switch: (a) Remove the DO-NOT-CLOSE tag and close this circuit breaker: 1) E3-3 Electrical Shelf, APU Control Unit (b) Remove the DO-NOT-OPERATE tag from the APU master switch on the P5 forward overhead panel.
S 714-011
(5) Do the operational test of the surge bleed valve (AMM 49-52-41/501).
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