01 March 2005
indications in cockpit systems. Antenna coaxial
a. Primary Cleaning Method.
connectors have similar moisture problems. Coaxial
connectors shall be cleaned and treated in accordance
(1) Clean in accordance with cleaning Track
6-3.13. WIRE HARNESSES AND CABLES. When
(2) If grease is present, clean and degrease in
corrosion is found at the pin to wire connection on
accordance with cleaning track DB2A. Refer to
electrical connectors, plugs, and receptacles, the wire
harness/cable should be inspected for corrosion/
cracking of the wire insulation. Coaxial cable shielding
b. Secondary Cleaning Method.
is particularly susceptible to corrosion. Wire harnesses
and cables shall be cleaned and treated as follows:
(1) Place the filter in a deep sink and flush
thoroughly with fresh water.
a. If corrosion is apparent at the back of a connector,
it may be necessary to remove an inch or two of the
(2) Scrub rigid or metal filters with Cleaning
wire harness cable cover to inspect for corrosion.
Compound, Aircraft Cleaning
b. Apply Isopropyl Alcohol, TT-I-735 (Volume IV or
(3) If oil or grease is present in filter, clean the
filter with a solution of nine parts fresh water to one part
C l e a n i n g Compound, MIL-PRF-85570 Type I I
(Volume IV or V, Chapter 2). Scrub rigid or metal filters
with Cleaning Brush, A-A-2074 (Volume IV or V,
Alcohol, TT-I-735, to flush area.
c. Shake excess solvent from wire harness and
wipe with Cleaning Cloth, CCC-C-46 Class 7
Compressed air used for drying can create
airborne particles that may enter the eyes.
d. Allow to air dry.
Pressure shall not exceed 10 psi. Eye
protection is required.
6-3.11.2., and 6-3.11.4.
(4) Blow off excess water with dry air or dry
nitrogen at not more than 10 psi pressure.
f. Where applicable, repair wire harness and cable
(5) Allow to air dry.
6-3.14. P R I N T E D CIRCUIT BOARDS. Edge
(6) Do not preserve filters.
connectors (and mating plugs) used in miniature and
microminiature printed circuit boards (PCBs) are
6-3.16. SENSITIVE INTERNAL METAL SURFACES.
cleaned and preserved in accordance with paragraph
Metal surfaces such as resonant cavities, tube covers,
and other delicate metal components, shall be
inspected for signs of corrosion. Remove corrosion
6-3.15. FILTERS. The cleaning of filters is essential to
and preserve as follows:
maintaining the cleanliness and, thus, reliable operation
of avionic/test equipment. The frequency of cleaning
shall be as appropriate based on local conditions.
and Polishing Pad, Non-Abrasive (Volume IV or V,
Filters shall be cleaned as follows: