A
737-300/400/500MAINTENANCE MANUAL
FIRE DETECTION ELECTRONICS RACK MODULE - REMOVAL/INSTALLATION
_____________________________________________________________
1. General
_______
A. The following procedure assures proper mating of electrical connectors while removing and installing the fire detection electronics rack module (M279).
B. Lever latches are used for movement and retention of electronic modules mounted on racks. This unit consists mainly of a handle and trigger (Fig. 401). Electronic modules are held in position by engagement of a hook on the lever-latch handle with a fork-type catch on the rack. Correct adjustment of the lever-latch fork is necessary to assure proper connector engagement.
TASK 26-10-01-004-001
2. Remove Fire Detection Electronics Rack Module (Fig. 401)
________________________________________________________
A. Procedure
S 864-011
CAUTION:_______SOME E/E BOXES ARE STATIC SENSITIVE. DO NOT HANDLE BEFORE READING PROCEDURE FOR HANDLING ELECTROSTATIC DISCHARGE SENSITIVE DEVICES (AMM 20-40-12). BOXES CONTAIN DEVICES THAT CAN BE DAMAGED BY STATIC DISCHARGE.
(1) Open these circuit breakers on the P6 panel:
(a)
FIRE PROTECTION DETECTION - ENG NO 1
(b)
FIRE PROTECTION DETECTION - ENG NO 2
(c)
FIRE PROTECTION DETECTION - APU
(d)
MASTER WARN AND CAUT
S 864-012
CAUTION: IMPROPER ADJUSTMENT OF ASSEMBLIES ON EQUIPMENT SHELVES MAY
_______
CAUSE CIRCUIT MALFUNCTION OR EQUIPMENT DAMAGE.
(2)
Press on the latch to let the levers move away from handle.
S 864-005
(3)
Move the levers down to force the module away from the shelf-mounted connector.
(4)
Remove the module from the shelf.
S 024-006
NOTE: To prevent foreign object contamination or damage, cover
____ all ports, openings and electrical connectors of unit or shelf with plastic caps or bags.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
SHELF ASSY
TYPICAL MATED ELECTRICAL CONNECTORS
A
B
NOTE: DIMENSIONS MAY BE MEASURED BY PUTTY OR A PAPER SLEEVE MATED (ALTERNATE METHOD) OR RING OF A SUITABLE LENGTH THAT WILL BE CRUSHED WHEN THE CONNECTOR IS MATED PROPERLY.
Electrical/Electronic Black Box Installation
Figure 401
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ú Mar 15/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
TASK 26-10-01-404-002
3. Install Fire Detection Electronics Rack Module (Fig. 401)
_________________________________________________________
A. Procedure
S 424-007
CAUTION: ELECTRICAL PINS ON E/E BOX CONNECTOR AND TRAY CONNECTOR MUST
_______ NOT BE BENT OR DAMAGED. INSTALLATION OF E/E BOX WITH DAMAGED PINS COULD RESULT IN DAMAGE TO E/E BOX, TRAY ELECTRICAL CONNECTOR, OR SYSTEM COMPONENTS.
(1) Slide the module into shelf with the levers in the open position until the levers engage in the shelf-mounted fork.
NOTE: Remove any protective caps or bags from unit or shelf prior
____
to installation.
S 864-013
CAUTION: IMPROPER ADJUSTMENT OF ASSEMBLIES ON EQUIPMENT SHELVES MAY
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