TM 11-6125-220-20
CHAPTER 3
ORGANIZATIONAL MAINTENANCE INSTRUCTIONS
3-1. Tools and Test Equipment
defects may be discovered before they result in serious
damage or failure. The necessary preventive mainten-
Tools and test equipment required for organizational
ance checks and services (PMCS) are listed and described
maintenance of the inverter are listed in section III,
in tables 3-1 and 3-2. The item numbers indicate the se-
quence of the minimum inspection requirements. Defects
3-2. Paints and Finishes
discovered during operation of the unit will be noted
When the inverter requires repainting, refinishing, or
for future correction to be made as soon as operation
touchup painting refer to Federal Standard No. 595A
has ceased. Stop operation immediately if a deficiency
for a matching color. SB 11-573 lists the tools and mis-
is noted during operation which would damage the
cellaneous supplies required for painting.
equipment. Record all deficiencies together with the cor-
rective action taken in accordance with TM 38-750.
3-3. Touchup Painting Instructions
a. Refer to TB 43-0108 for instructions on painting
and preserving Electronics Command equipment. In
once each intermediate interval. An intermediate interval
touchup painting a perfect match with the exact shade
is defined as approximately 75 flying hours. The inter-
of the original paint may not be possible. The prevention
mediate PMCS on the inverter should be performed
of corrosion and deterioration is the most important
concurrently with the intermediate PMCS scheduled on
consideration in touchup painting; appearance is secon-
the aircraft in which the equipment is installed. Adjust-
dary. This should not be construed to mean that the
ments of the maintenance interval must be made to
appearance of the equipment is unimportant. Touchup
compensate for any unusual operating conditions. Equip-
painting should be accomplished neatly, and in a good
ment maintained in a standby (ready for immediate
professional manner. Field inspection personnel will
operation) condition must have intermediate maintenance
make allowance for slight color mismatch where minor
performed on it at least once every 30 days. Equipment
touchup has been done, but not for neglect or poor
in limited storage (requires service before operation)
quality of work.
does not require intermediate maintenance.
b. Remove rust and corrosion from metal surfaces
by lightly sanding them with fine sandpaper. Brush two
once each periodic interval in addition to the interme-
thin coats of paint on the bare metal to protect it from
diate PMCS in table 3-1. Periodic preventive mainten-
further corrosion.
ance will be scheduled in accordance with the require-
3-4. Lubrication
ments of TM 38-750. The periodic preventive mainten-
No lubrication is required at organizational category.
ance inspection should be scheduled concurrently with
the periodic maintenance service schedule of the aircraft
3-5. Preventive Maintenance Checks and
in which the inverter is installed to reduce out-of-service
Services
time. Refer to the applicable aircraft technical manual
a. To be sure that the inverter is always ready for
for the hours between service periods.
operation, it must be inspected systematically so that
Intermediate PMCS
Table 3-1.
Total time required: 0.4
Work time
Sequence
ITEM TO BE INSPECTED
PROCEDURE
(T/H)
No.
EXTERNAL WIRING:
0.1
1
Inspect external wires and cable for
damaged insulation of jacketing.
AIR VENTS:
2
Check the airflow intake and exhaust
vents for obstructions.
EXTERIOR SURFACES:
0.1
3
Remove dirt and moisture, and inspect
for rust, corrosion, and chipped paint.
3-1
