TM 55-1905-223-24-14
(6)
Remove eight screws (8) securing rear panel (7) to assembly and pull rear panel back as far as cabling will
allow for access to inside of assembly.
(7)
Remove four screws (11) and lockwashers (12) from plate (10) securing cable (3) and jack (9) J1 to rear
cabinet frame member.
(8)
Tag and remove cable (3) wiring from terminal board TB1 (located internally).
(9)
Remove cable (3) with jack (9) J1 and leads from cabinet.
(10) Disassemble stuffing tube (4) from cable (3) and remove cable from rear panel (7).
(11) On replacement cable (3), assemble stuffing tube (4) to cable and rear panel (7).
(12) Route cable (3) with jack (9) J1 and leads inside of cabinet.
(13) Connect cable (3) leads to terminal board TB1 (located internally). Remove tags.
(14) Connect jack (9) J1 to plug P1 (internal) and secure jack (9) J1 to rear cabinet member with plate (10) and
four lockwashers (12) and screws (11).
(15) Dress cables (1, 2, 3, and 5) inside of cabinet and secure stuffing tube (4) assembled on cable (3) and rear
panel (7).
(16) Position rear panel (7) on gyro control and power assembly (13) and secure with eight screws (8).
(17) Position gyro control and power assembly (13) on mounting surface.
(18) Secure gyro control and power assembly (13) to mounting surface with four bolts (6).
(19) Replace gyro compass (para. 2-12).
(20) On pilot house dc panel, set circuit breaker No. 1F (MK 27 GYRO PWR XFR UNIT) to ON. Remove "Out of
Service, Do Not Operate" tag.
(21) On pilot house IC/ELEX panel, set circuit breaker No. 1F (MK 27 GYRO PWR CONV UNIT) to ON. Remove
"Out of Service, Do Not Operate" tag.
(22) Start compass. Refer to TM 55-1905-223-10.
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