(b)
Open these circuit breakers and attach the DO-NOT-CLOSE tags:
1) P6-5 Load Control Center Assembly a) APU CONT b) APU Generator Control Unit
S 014-003
(2) Open the access door to the electronic equipment compartment.
S 024-004
CAUTION: YOU MUST CAREFULLY DO THE STEPS IN THE TASKS BELOW TO REMOVE
_______ THE APU CONTROL UNIT. A FAILURE TO DO THE STEPS CORRECTLY CAN CAUSE DAMAGE TO THE EQUIPMENT.
(3) Do these tasks to remove the APU control unit:
(a) "Rack Mounted E/E Box Removal" (AMM 20-10-07/201).
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////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES /MAINTENANCE MANUAL ////////////////////////
APU CONTROL UNIT APU CONTROL UNIT
2
APU CONTROL UNIT WITHOUT THE
"TEST PASS" AND "TEST FAIL" LIGHTS
APU CONTROL UNIT WITH THE "TEST PASS" AND "TEST FAIL" LIGHTS
APU Control Unit Installation Figure 401
A10797
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(b) "ESDS Metal Encased Units Removal" (AMM 20-40-12/201).
TASK 49-61-11-404-005
3. APU Control Unit Installation (Fig. 401)
_____________________________
A. References
(1)
AMM 20-10-07/201, E/E Rack Mounted Components
(2)
AMM 20-40-12/201, Electrostatic Discharge Sensitive Devices
(3)
AMM 49-11-00/501, APU Power Plant
B. Access
(1)
Location Zones
101 Control Cabin (Left)
205 Electronic Compartment
(2)
Access Panels
1201 Electronic Equipment Access Door
C. Procedure
S 424-006
CAUTION: YOU MUST CAREFULLY DO THE STEPS IN THE TASKS BELOW TO INSTALL
_______ THE APU CONTROL UNIT. A FAILURE TO DO THE STEPS CORRECTLY CAN CAUSE DAMAGE TO THE EQUIPMENT.
(1) Do these tasks to install the APU control unit:
(a)
"Rack Mounted E/E Box Installation" (AMM 20-10-07/201).
(b)
"ESDS Metal Encased Units Installation" (AMM 20-40-12/201).
S 864-008
(2) Set the circuit breakers and the switch:
(a)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
1) P6-5 Load Control Center Assembly a) APU Generator Control Unit b) APU CONT
(b)
Remove the DO-NOT-OPERATE tag from the APU master switch on the P5 forward overhead panel.
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(3) S 714-009Do the APU operation test (AMM 49-11-00/501): (a) Do the APU fire shutdown (AMM 49-11-00/201) to stop the APU.
NOTE:____ Use one of the two fire handles to do a test of the circuit through the APU control unit.
(4) S 414-007Close the access door to the electronic equipment compartment.
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