(b)  
P7 Overhead Circuit Breaker Panel
 1) 7B24 STBY INSTR ILS IND
 2) 7B25 STBY INSTR ATTD IND

 S 024-003
 CAUTION: PERMIT 9 MINUTES FOR THE GYRO TO STOP AFTER THE REMOVAL OF THE
_______ ELECTRICAL POWER. REMOVAL OF THE STANDBY ATTITUDE INDICATOR BEFORE THE GYRO STOPS CAN CAUSE DAMAGE TO THE GYRO.
 ATTACH THE DEVICE THAT LOCKS THE KNOB ON THE FRONT OF THE INSTRUMENT. THIS WILL PREVENT DAMAGE TO THE GYRO IN THE INSTRUMENT WHEN NOT INSTALLED ON THE AIRPLANE.
 (2)  Do these steps to remove the standby attitude indicator:
 (a)  
Pull the knob out from the face of the indicator and install the lock device to cage the standby attitude display.

 (b)  
Loosen the two larger indicator clamp screws adjacent to the indicator.

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 CAUTION: CAREFULLY REMOVE THE INDICATOR FROM THE INSTRUMENT PANEL.
_______ THIS WILL PREVENT DAMAGE TO THE ELECTRICAL CABLES AT THE REAR OF THE INDICATOR.
 (c)  
Pull the indicator from the instrument panel to get to the electrical connector.

 (d)  
Disconnect the electrical connector DN138 from the indicator.

 S 554-004
 (3)  Put the indicator on a soft, level surface.
 TASK 34-24-01-404-005
 3. Install the Standby Attitude Indicator
______________________________________
 A. References
 (1)  AMM 24-22-00/201, Manual Control
 B. Access
 (1)  Location Zone
 221 Control Cabin, LH

 C. Procedure
 S 864-006
 (1)  Make sure these circuit breakers are open with the DO-NOT-CLOSE tags attached:
 (a)  
P6 Main Power Distribution Panel
 1) 6E19 FLT DK LIGHTS PANEL CAPT
 2) 6E23 FLT DK LIGHTS PANEL F/O
 3) 6L1 FLT DECK LIGHT STBY INST

 (b)  
P7 Overhead Circuit Breaker Panel
 1) 7B24 STBY INSTR ILS IND
 2) 7B25 STBY INSTR ATTD IND

 S 424-007
 (2)  Do these steps to install the standby attitude indicator:
 (a)  Connect the electrical connector DN138 to the indicator.
 CAUTION: CAREFULLY INSTALL THE INDICATOR INTO THE INSTRUMENT PANEL.
_______ THIS WILL PREVENT DAMAGE TO THE ELECTRICAL CABLES AT THE REAR OF THE INDICATOR.
 (b)  
Install the indicator into the instrument panel.

 (c)  
Tighten the indicator clamp screws.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400
MAINTENANCE MANUAL

 CAUTION: ATTACH THE DEVICE THAT LOCKS THE KNOB ON THE FRONT OF THE
_______ INSTRUMENT. THIS WILL PREVENT DAMAGE TO THE GYRO IN THE INSTRUMENT WHEN NOT INSTALLED IN THE AIRPLANE.
 (d)  Remove the lock device from the knob on the standby attitude indicator.
 S 864-008
 (3)  Remove the DO-NOT-CLOSE tags and close these circuit breakers:
 (a)  
P6 Main Power Distribution Panel
 1) 6E19 FLT DK LIGHTS PANEL CAPT
 2) 6E23 FLT DK LIGHTS PANEL F/O
 3) 6L1 FLT DECK LIGHT STBY INST

 (b)  
P7 Overhead Circuit Breaker Panel
 1) 7B24 STBY INSTR ILS IND
 2) 7B25 STBY INSTR ATTD IND

 S 864-009
 (4)  
Supply electrical power (AMM 24-22-00/201).

 S 714-010

 (5)  
Make sure the panel lights for the standby attitude indicator are on.

 (6)  
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 S 864-011
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
　
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