S 394-025
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A
747-400
MAINTENANCE MANUAL

 S 414-026
 (12)
 Close the 315A access door (AMM 06-09-05/201).

 S 864-028

 (13)
 Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  
P7, Overhead Circuit Breaker Panel 1) 7E7, STAB TRIM L S/O VALVE 2) 7E20, STAB TRIM R S/O VALVE 3) 7E6, STAB TRIM L CONT 4) 7E19, STAB TRIM R CONT 5) 7E23, STAB TRIM ALTN CONT 6) 7C14, FLT CONT ELEC 1R AC 7) 7C15, FLT CONT ELEC 1R DC 8) 7C16, FLT CONT ELEC 2R AC 9) 7C17, FLT CONT ELEC 2R DC

 S 864-027
 (14) If the electrical power is not necessary, do this task:  "Remove Electrical Power" (AMM 24-22-00/201).
 TASK 27-48-01-004-029
 4. Horizontal Stabilizer Position Transmitter Assembly Removal (Fig. 401)
___________________________________________________________
 A. References
 (1)  
AIPC 27-48-52, Fig. 1

 (2)  
SSM 27-48-01

 (3)  
WDM 27-48-11

 B.
Access

 (1)  
Location Zone
 315, 316 Area Aft of Stabilizer Box

 (2)  
Access Panel
 315A Access Door

 C.
Procedure

 S 864-030
 (1)  
Set the STAB TRIM 2 and 3 switches to CUTOUT.

 S 864-031

 (2)
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
P6, Main Power Distribution Panel 1) 6K23, STAB TRIM POSN IND L 2) 6K24, STAB TRIM POSN IND R

 (b)  
P7, Overhead Circuit Breaker Panel 1) 7E7, STAB TRIM L S/O VALVE

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 2) 7E20, STAB TRIM R S/O VALVE 3) 7E6, STAB TRIM L CONT 4) 7E19, STAB TRIM R CONT 5) 7C10, FLT CONT ELEC 2L AC 6) 7C11, FLT CONT ELEC 2L DC 7) 7C12, FLT CONT ELEC 1L AC 8) 7C13, FLT CONT ELEC 1L DC 9) 7C14, FLT CONT ELEC 1R AC 10) 7C15, FLT CONT ELEC 1R DC 11) 7C16, FLT CONT ELEC 2R AC 12) 7C17, FLT CONT ELEC 2R DC
 S 014-032
 (3)  
Open the 315A access door (AMM 06-09-05/201).

 S 034-033

 (4)  
Remove these electrical connectors from the applicable transmitter:

 (a)  
DM7884, Left Transmitter

 (b)  
DM7883, Center Transmitter

 (c)  
DM7882, Right Transmitter

 S 034-034
 (5)  
Disconnect the bonding jumper from the transmitter.

 S 034-007

 (6)  
Remove the nut, two washers, spacer and bolt to disconnect the crank from the control rod.

 S 024-035

 (7)  
Remove the transmitter assembly:

 (a)  
Remove four assembly mounting bolts and washers.

 (b)  
Remove the transmitter assembly.

 TASK 27-48-01-404-036
 5.  Horizontal Stabilizer Position Transmitter Assembly Installation (Fig. 401)________________________________________________________________
 A. Consumable Materials
 (1)  
A00779 Sealant, BMS 5-26 Type II

 B.
References

 (1)  
AMM 06-09-05/201, Body Section 48 Access Doors and Panels

 (2)  
AMM 24-22-00/201, Manual Control

 (3)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (4)  
AIPC 27-48-52, Fig. 1

 (5)  
SSM 27-48-01

 (6)  
WDM 27-48-11

 C.
Access

 (1)  
Location Zone
 315, 316 Area Aft of Stabilizer Box

 (2)  
Access Panel
 315A Access Door

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