4-2
4.1. PREVENTIVE MAINTENANCE
CHECKS AND SERVICES (PMCS)
4.1.1. PURPOSE OF PMCS
PMCS is performed daily when in use to be sure that the sight is
readyatalltimes.ProcedureslistedinTable4-1areasystematic
inspection of
ThOR
that will enable you to discover defects that
might cause the sight to fail on a mission.
4.1.2. FREQUENCY OF PERFORMING PMCS
The frequency of performing PMCS is as follows:
A. Daily when the sight is in use.
B.Whenitisremovedfromthecaseforanyreason.
TABLE 4-1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES
SEQ.
NO.
ITEM TO
CHECK
CHECKING PROCEDURE
NOT FULLY MISSION
CAPABLE IF:
1
Complete-
ness
Inventory items by means
of comparing with the data
specified in this manual.
Items missing.
2 Sight Body
Inspect for missing screws
or connector cap.
Screws or connector
cap missing.
3
Front Lens
Cap
Inspect for cuts, tears and
dirt. Clean as required.
Cap torn or cut.
4
Battery
Compart-
ment
Check for corrosion, springs
tension.
Springs corroded or
damaged.
5
Reticle ad-
justment
knob
Check for operation (without
batteries).
Knobinoperative.
Knobmissing.
6 Lenses
Inspect for cleanliness,
scratches, chips or cracks.
Clean as required.
Chipped, cracked or
if scratches hinder
vision through the
sight.
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