good general (physical) condition and in good operating con-
dition. To assist organizational maintenance repairmen in
72. This section describes organizational, field, intermedi-
maintaining serviceability y, the charts indicate what to check,
ate, direct and general support, and depot maintenance for
how to check, and the normal conditions; the References
servicing Control, Transponder Set C-6280(P)/APX, C-6280A
column lists the paragraphs or technical manuals that con-
(P)/APX, C-6717/APX, and C-7483/APX. It includes (Army)
tain detailed repair or replacement procedures. If the defect
preventive maintenance procedures, preliminary inspection
cannot be remedied by the organizational repairman, higher
procedures, trouble location procedures, and repair informa-
level maintenance is required. Records and reports of these
tion. Personnel should be familiar with the operation of the
checks must be made in accordance with TM 38-750.
system in which the transponder set control is used in order
to isolate the cause of malfunctions.
75. (Army) INTERMEDIATE PREVENTIVE MAINTE-
NANCE CHECKS AND SERVICES.
73. (Army) PREVENTIVE MAINTENANCE.
76. Perform the maintenance functions indicated in the in-
7-4. Preventive maintenance is the systematic care, servic-
termediate preventive maintenance checks and services chart
ing, and inspection of equipment to prevent the occurrence
(paragraph 77) once each intermediate interval. An inter-
of trouble, to reduce out-of-service time, and to assure that
mediate interval is defined as approximately 25 flying hours.
the equipment is serviceable.
The intermediate preventive maintenance checks and services
a. Systematic Care. The procedures given in this para-
should be performed concurrently with the intermediate pre-
graph and paragraphs 75 through 712 cover routine sys-
ventive maintenance checks and services scheduled on the
tematic care and cleaning essential to proper upkeep and
aircraft in which the equipment is installed. Adjustments of
operation of the equipment.
the maintenance interval must be made to compensate for
b. Preventive Maintenance Checks and Services. The pre-
any unusual operating conditions. Equipment maintained in
ventive maintenance checks and services charts (paragraphs
a standby (ready for immediate operation) condition must
77 and 712) outline functions to be performed at specif-
have intermediate maintenance performed at least once every
ic intervals. These checks and services are to maintain Army
30 days. Equipment in limited storage (requires service be-
fore operation) does not require intermediate maintenance.
electronic equipment in a serviceable condition; that is, in
77. (Army) INTERMEDIATE PREVENTIVE MAINTENANCE CHECKS AND SERVICES CHART