TM 11-5820-890-30-4
Section IV. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)
3-14. GENERAL.
PMCS are required for the reference fixture. They are needed to keep it in good working order. Do the checks in
the PMCS table at the intervals listed. Some checks and services must be done whenever you see they need to
be. These routine tasks are not listed in the table. They include cleaning, checking cables for damage, stowing
items not used, and checking for loose nuts, bolts, and screws.
3-15. PREVENTIVE MAINTENANCE CHECKS AND SERVICES.
ITEM
ACTION
REMARKS
a. Holding battery in RT
Set FCTN: STBY.
Perform this check
Set CB1: OFF.
every six months.
If RT loses fill information,
replace holding battery.
b. Holding battery in ECCM
Replace every six months.
fill device
c. ECCM fill devices
Test daily for presence of
fill information.
Refer to paragraph 3-22
for loss of fill information.
3-24