01 March 2005
Repair conducted by Organizational/Unit or
Intermediate Maintenance Activities shall not
include disassembly of avionic equipment
beyond authorized limits established by the
p a r e n t service organization. Cleaning,
corrosion repair, treatment and preservation
Do not use synthetic fiber wiping cloths with
o f equipment shall include all cables,
Isopropyl Alcohol, TT-I-735, due to its low
harnesses, and hardware furnished with each
flash point. Dry fiber wiping cloths will cause a
piece of equipment.
static charge buildup and can result in a fire.
2-18.104.22.168. In some cases the component may be
2-22.214.171.124. Apply a mixture of one part Isopropyl
removed from the equipment without too much difficulty.
When this is possible, the removed component shall
one part distilled water to affected areas with Cleaning
be cleaned separately.
2-5.3.7. Hand Cleaning Methods. Hand methods shall
Toothbrush, or any brush as appropriate.
be used for cleaning small, delicate, confined surfaces
where parts cannot tolerate other means of cleaning.
2-126.96.36.199. W i p e or scrub affected area until
Also, hand methods shall be used when accessories/
facilities for other methods that are not available. Hand
cleaning methods for avionics utilize the following
2-188.8.131.52. Remove residue by blotting or wiping with
(refer to Volume IV or V):
Inspect affected areas for signs of residues and
a. Cloth, CCC-C-46.
b. Cheesecloth, CCC-C-440.
2-184.108.40.206. Discard contaminated cloths and solvents
in approved disposal containers after cleaning
c. Cotton tip applicator.
d. Acid brush, A-A-289.
2-5.3.9. Cleaning and Removal of Solder Flux
Residue. Solder flux residue is present in all solder
operations. This residue will cause corrosion if an
g. Lint-free cloth, A-A-59323.
electrolyte is present. Use of cleaning solvents that do
not damage associated wiring circuit components, or
h. Cotton flannel, CCC-C-458.
laminated circuit board coatings is required. The
presence of solder flux can be detected by using
i. Plastic manual spray bottle.
2-5.3.8. Fingerprint Removal. The fats and oils caused
by fingerprints are highly corrosive.
Prior to ultraviolet (UV) light inspection, avionic
equipment must be examined for Erasable
Programmable Read Only Memory (EPROM)
2-220.127.116.11. EPROMs have windows that are usually
covered with an aluminum foil mask or black tape.
Visually examine EPROMs to ensure the tape or foil