TM 11-5855-250-12&P
CHAPTER 4
OPERATOR AND ORGANIZATIONAL MAINTENANCE INSTRUCTIONS
Section I. PREVENTIVE MAINTENANCE
4-1. General
4-2. Operator's Weekly Preventive Maintenance
Preventive maintenance is the systematic care, servicing,
and inspection of equipment to prevent the occurrence of
maintenance checks and services to be performed by the
trouble, reduce downtime, and assure that the equipment
operator. The checks and services are to be performed in
is serviceable. If inspection of the equipment reveals any
sequence.
damage which cannot be remedied by operator or
4-3. Organizational Monthly Preventive Maintenance
organizational maintenance personnel, a higher category
of maintenance or repair is required. Records and reports
maintenance checks and services to be performed by
of these checks and services must be made in
organizational maintenance personnel. The checks and
accordance with the requirements set forth in TM 38-750.
services are to be performed in sequence.
Section II. OPERATOR'S PREVENTIVE MAINTENANCE
4-4. Scope of Operator's Maintenance
a. The maintenance duties assigned to the operator of
Sequence
ITEM TO BE INSPECTED
Work
units
specifies checks and services that must be
number
PROCEDURE
(T/H)
accomplished once each week, or under special
conditions listed below.
(1) When the searchlight is initially installed.
b. Searchlight housing assembly for
(2) When the searchlight is reinstalled after
obstructions in the blower inlet
and outlet screens.
Clean
removal for any reason.
exterior
surface,
including
(3) Before going on a mission, and as soon
nameplates;
be
sure
that
after completion of the mission as possible.
nameplates are legible. Inspect
b. The duties assigned do not require special tools
latches; check to see that they
or test equipment.
close properly.
Refer to
4-5. Materials Required for Operator's Maintenance
a. Lint-free cloth (NSN 8305-00-170-5062).
detailed instructions.
b. Fresh water and mild soap.
corrosion, stripped threads, bent
d. Lens tissue (NSN 5640-00-393-2090).
or
broken
pins,
damaged
4-6.
Operator's Weekly Preventive Maintenance
insulation, broken strands, and
Checks and Services
d. Primary reflector for scratches or
Refer to table 4-1 for operator's weekly preventive
pitted surface. Clean with pure
maintenance checks and services.
alcohol; use lens tissue or clean,
Table 4-1. Operator's Preventive Maintenance Checks
lint-free cloth.
and Services
e. Indicator light for dirt; clean if
Total task/hours required. 0 8
needed.
Sequence
ITEM TO BE INSPECTED
Work units
f. Lamp housing assembly for
cracked or broken lens and
PROCEDURE
(T/H)
1
Inspect the following:
0.3
parts location.
g. Cowling
assembly
for
a. Cover assembly for tears,
cleanliness. Remove and clean
damaged buckles, dirt, and
glass if needed.
Replace
proper
fit
with
cowling
cowling assembly and check for
assembly; clean if needed.
proper
fit
with
searchlight
housing assembly.
Inspect
location.
latches; check to see that they
close properly.
h. Levels for cracked glass; clean
4-1