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
ready at all times. Procedures listed in Table 4-1 are a systematic
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. When it is removed from the case for any reason.
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).
Knob inoperative.
Knob missing.
6
lenses
Inspect for cleanliness,
scratches, chips or cracks.
clean as required.
chipped, cracked or
if scratches hinder
vision through the
sight.
Summary of Contents for ThOR Series
Page 8: ...iii ...
Page 9: ...1 1 SECTION I introduction ...
Page 21: ...2 1 SECTION II assembly and preparation ...
Page 28: ...2 8 ...
Page 29: ...3 1 SECTION III OPERATION ...
Page 37: ...4 1 SECTION IV maintenance instructions ...
Page 43: ...4 7 ...