(4)  
Install the N2 indicator.

 TASK 77-12-02-024-007-C00
 2. N1 Indicator Removal
____________________
 A. Access
 (1)  Location Zone
 101, 102 Control Cabin

 B. Procedure
 S 864-005-C00
 (1)  For the left engine, open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  P6 Main Power Distribution Panel
 1) C00732 TACH IND ENG 1 N1

 S 864-027-C00
 (2)  For the right engine, open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  P6 Main Power Distribution Panel
 1) C00733 TACH IND ENG 2 N1

 S 034-002-C00
 (3)  Loosen the adjustment screw of the clamp that attaches the indicator to the panel.
 NOTE: The screws that are on the top left side of the indicator
____
 are adjustment screws.

 S 024-003-C00
 (4)  Carefully pull the indicator from the instrument panel to get access to the electrical connector.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITHOUT ENGINE INSTRUMENT ú

 77-12-02
 SYSTEM (EIS) DISPLAY  ú ú C05 Page 401 ú Mar 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
S 034-040-C00
 CAUTION:  CLEARLY IDENTIFY CONNECTIONS BEFORE YOU DISCONNECT THEM.
_______ CROSS-CONNECTION OF THE TACHOMETER INDICATOR (ON THE P2 INSTRUMENT PANEL) IS A POSSIBILITY WHEN YOU WORK WITH THIS COMPONENT.
 (5)  
Disconnect the electrical connector from the indicator.

 S 024-006-C00

 (6)  
Remove the indicator from the instrument panel.

 TASK 77-12-02-424-008-C00
 3.  N1 Indicator Installation_________________________
 A. References
 (1)  AMM 77-12-00/501, Engine Tachometer System
 B. Access
 (1)  Location Zone
 101, 102 Control Cabin

 C. Procedure
 S 434-039-C00
 CAUTION: POSITIVELY IDENTIFY CONNECTIONS BEFORE YOU CONNECT THEM AND DO
_______ FUNCTION CHECK UPON COMPLETION OF CONNECTION. CROSS-CONNECTION OF THE TACHOMETER INDICATOR (ON THE P2 INSTRUMENT PANEL) IS A POSSIBILITY WHEN YOU WORK WITH THIS COMPONENT.
 (1)  
Connect the electrical connector to the indicator.

 S 424-010-C00

 (2)  
Install the indicator into the panel.

 S 434-011-C00

 (3)  
Tighten the adjustment screw on the clamp that attaches the
 indicator.

 S 864-012-C00

 (4)  
For the left engine, close these circuit breakers and remove DO-NOT-CLOSE tags:

 (a)  P6 Main Power Distribution Panel
 1) C00732 TACH IND ENG 1 N1

 S 864-028-C00
 (5)  For the right engine, close these circuit breakers and remove DO-NOT-CLOSE tags:
 (a)  P6 Main Power Distribution Panel
 1) C00733 TACH IND ENG 2 N1

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITHOUT ENGINE INSTRUMENT ú

 77-12-02
 SYSTEM (EIS) DISPLAY  ú ú C04 Page 402 ú Mar 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
S 714-014-C00
 (6)  Do the operational test of the N1 tachometer system
 (AMM 77-12-00/501).

 TASK 77-12-02-024-013-C00
 4. N2 Indicator Removal
____________________
 A. Access
 (1)  Location Zone
 101, 102 Control Cabin

 B. Procedure
 S 864-015-C00
 (1)  For the left engine, open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  P6 Main Power Distribution Panel
 1) C00734 TACH IND ENG 1 N2

 S 864-029-C00
 (2)  For the right engine, open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  P6 Main Power Distribution Panel
 1) C00735 TACH IND ENG 2 N2
　
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