TM 11 5855-250-12&P
Table 4-2. Organizational Preventive Maintenance
.Monthly Checks and Services
Total task-hours required: 1.5
Sequence No.
Item to be inspected procedure
Work
.
Time
(M/H)
1
COVER ASSEMBLY
0.1
Inspect for tears, damaged buckles, dirt, and proper fit with cowling assembly.
Clean if needed. Replace if worn or damaged. Refer to figure 1-3 for
location.
2
SEARCHLIGHT HOUSING ASSEMBLY
0.1
Clean exterior surface including nameplates; make sure that nameplates are
legible. Inspect cowling latches; check to see that they close properly.
Inspect blower inlet and outlet screens; remove any obstructions. Inspect
heat exchanger assembly air ducts for accumulations of dirt. If needed,
remove blower outlet and inlet screens; set main power switch to OFF,
and flush out air ducts by pouring water into blower inlet port. Replace
blower inlet and outlet screens. Refer to paragraph 3-3, 3-8b, and 4-7 for
detailed procedures.
NOTE
Heat exchanger assembly is sealed to prevent water from entering
searchlight housing assembly.
3
COWLING ASSEMBLY
0.1
Remove and check inner gasket and outer ring; they must make a secure and
watertight seal. Clean glass if needed. Replace cowling assembly and
check to see that it fits properly with searchlight housing assembly. Inspect
cowling latches; check to see that they close properly. Replace cowling
assembly if it is damaged, not watertight, or fits improperly to searchlight
housing assembly. Refer to paragraph 3-8b for detailed procedures.
4
INDICATOR LIGHT
0.1
Inspect for dirt; clean if needed. Refer to paragraph 4-6 for detailed
procedures
5
PRIMARY REFLECTOR
0.1
Inspect for scratches or pitted surface. Clean with pure alcohol; use lens
tissue or lint-free cloth.
6
LAMP HOUSING ASSEMBLY
0.1
Inspect for cracked or broken lens, and corrosion. Refer to figure 1-5 for parts
location.
7
CABLE ASSEMBLIES (WHERE APPLICABLE)
0.1
Inspect for corrosion, stripped threads, damaged insulation, broken strands,
and proper fit to receptacles; replace if needed.
8
SEARCHLIGHT
0.3
Perform an operational check by following start, standby, and stop
procedures. Place searchlight of all modes of operation and check for
proper response. Inspect indicator light on control box for proper operation
during overdrive mode. If lamp is defective, remove lens cap; turn it
counterclockwise and replace lamp.
Replace lens cap.
Refer to
procedures. Check for completeness. Refer to appendix B for list.
9
MT-3900A/GSS-14(V)
0.1
Turn azimuth and elevation handwheels; see that mechanical action
Change 1 4-3
