TM 55-1905-223-24-14
This task covers: a. Remove, b. Replace.
INITIAL SETUP
Tools
Equipment Condition
Tool kit, general mechanic's,
TM 55-1905-223-10, gyro compass
secured.
Tool kit, Electrician's,
Gyro compass removed (para. 2-12).
Materials/Parts
Gyro control and power assembly,
P/N 1884066-1
Warning tags, Item 8, Appendix C
REMOVAL
a.
On pilothouse dc panel, set circuit breaker No. 1F (MK 27 GYRO PWR XFR UNIT) to OFF. Tag "Out of
Service, Do Not Operate."
b.
On pilothouse IC/ELEX panel, set circuit breaker No. 1 (MK 27 GYRO PWR CONV UNIT) to OFF. Tag "Out
of Service, Do Not Operate."
c.
Remove four bolts (6) that mount gyro control and power assembly (13).
d.
Remove eight screws (8) securing rear panel (7) to cabinet and pull panel back for access to inside of
cabinet.
e.
Disassemble stuffing tube assemblies (4) on cabling.
f.
Tag and remove leads of cables (1, 2, 3 and 5) from terminal board TB-1 inside of cabinet.
g.
Remove four screws (11) and lockwashers (12) from plate (10) that secures cable (3) and jack (9) J1 to rear
cabinet frame member, then remove J1 (9) and plate (10) from cabinet.
h.
Lift gyro control and power assembly (13) from mounting foundation.
2-20
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