TM 9-4120-399-14
GENERAL SUPPORT MAINTENANCE INSTRUCTIONS
Section I. REPAIR PARTS, SPECIAL TOOLS; TMDE, AND SUPPORT EQUIPMENT
are required for general support maintenance of the air conditioner. Test, Maintenance, and
diagnostic Equipment (TMDE), and support equipment, includes standard electrical test equipment,
and standard pressure and vacuum gages, vacuum pumps, and servicing manifolds found in any
general support maintenance refrigeration facility.
Section II. GENERAL SUPPORT MAINTENANCE PROCEDURES
support maintenance level on the Maintenance Allocation Chart (MAC) which is provided in
6-3. CASING, REPAIR.
a. Blind Nuts and Nut Plates.
(1) To replace blind nuts (rivnuts) use a drill slightly smaller than the body of the blind nut.
(a) Carefully drill the old blind nut out.
(b) Install replacement part.
(2) To replace nut plates, use a drill slightly smaller than the body of the rivets securing the
nut plate.
(a) Carefully drill the rivets loose.
(b) Remove the old nut plate.
(c) Install new nut plate with properly sized rivets.
b. Insulation, Casing.
(1) Inspection.
Check that insulation is not loose, missing, burnt or otherwise
damaged. Replace if missing or damaged. Reglue if loose.
