S 032-075
(10)
Remove the O-rings (14 and 15) and the retainers (22 and 23) from the shutoff valve (18).
(a)
Discard the O-rings and the retainers.
TASK 27-41-04-402-076
10. Motor Operated Shutoff Valve Installation_________________________________________
A. Parts ~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 201 | 14 | Packing (O-ring) | 27-41-04 | 05 | 135 | | | 15 | Packing (O-ring) | | | 125 | | | 18 | Shutoff Valve | | | 115 | | | 20 | Bolt | | | 105 | | | 21 | Washer | | | 110 | | | 22 | Retainer | | | 130 | | | 23 | Retainer | | | 120 | 2......…........…...................................…...........….....…........1
B. References
(1)
AMM 06-09-05/201, Body Section 48 Access Doors and Panels
C.
Access
(1)
Location Zone
311 Area Aft of Pressure Bulkhead, LH
312 Area Aft of Pressure Bulkhead, RH
(2)
Access Panel 312A Horizontal Stabilizer Jackscrew Access Door
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A
747-400 MAINTENANCE MANUAL
D. Procedure
S 422-078
(1)
Install the shutoff valve (18) (Fig. 201):
(a)
Install the O-rings (14 and 15) and the retainers (22 and 23) on the shutoff valve (18).
(b)
Install the shutoff valve (18) on the STCM (1).
(c)
Install the bolts (20) and the washers (21) that attach the shutoff valve (18) to the STCM (1).
S 432-102
(2)
Connect the electrical connector DB188C or DB189C on the shutoff valve (18).
S 862-103
(3)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
P7, Overhead Circuit Breaker Panel
1) 7E6, STAB TRIM L CONT
2) 7E7, STAB TRIM L S/O VLV
3) 7E19, STAB TRIM R CONT
4) 7E20, STAB TRIM R S/O VLV
S 862-104
(4)
Remove the DO-NOT-MOVE tags and set the STAB TRIM 2 and 3 switches to ON.
S 862-120
(5)
Close the access door 312A (AMM 06-09-05/201).
S 712-118
(6)
Do this task: "Operational Test - Motor Operated Shutoff Valve" (Ref Paragraph 11).
TASK 27-41-04-702-121
11. Operational Test - Motor Operated Shutoff Valve_______________________________________________
A. References
(1) AMM 24-22-00/201, Manual Control
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A
747-400
MAINTENANCE MANUAL
(2)
AMM 29-11-00/201, Main Hydraulic Supply System
B.
Access
(1)
Location Zone
311 Area Aft of Pressure Bulkhead, LH
312 Area Aft of Pressure Bulkhead, RH
(2)
Access Panel
312A Horizontal Stabilizer Jackscrew Access Door
C.
Procedure
S 862-105
(1)
Do this task: "Supply Electrical Power" (AMM 24-22-00/201).
S 862-106
(2)
Do this task: "Supply Hydraulic Power" (AMM 29-11-00/201).
S 712-149
(3)
Do a test of the shutoff valves:
(a)
Make sure the two shutoff valves are closed: 1) Set the STAB TRIM 2 and 3 switches to CUTOUT. 2) Hold the STAB TRIM ALTN switches to APL NOSE UP. 3) Make sure the stabilizer position indicators on the control
stand show no movement. 4) Hold the STAB TRIM ALTN switches to APL NOSE DN. 5) Make sure the stabilizer position indicators show no
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