01 March 2005
NAVAIR 01-1A-509-3
TM 1-1500-344-23-3
TO 1-1-689-3
WARNING
Ensure that electrical power is disconnected
Compound, Corrosion Preventive
3
from the light assembly prior to corrosion
Water-Displacing
removal and preservation procedures.
MIL-C-81309
a. Remove the light cover assembly and bulb from
(1) Apply a thin film of Water Displacing
the socket.
Corrosion Preventive Compound, MIL-C-81309 Type
III (Volume IV or V, Chapter 2) to metal base of bulb
b. Remove corrosion with Abrasive Mat, A-A-58054
and bulb socket.
Type I (Volume IV or V, Chapter 2), or Cleaning and
Polishing Pad, Non-Abrasive (Volume IV or V,
(2) Wipe metal base of bulb with Cleaning
Chapter 2). Scrub affected area to loosen corrosion
Cloth, CCC-C-46 Class 7 (Volume IV or V, Chapter 2),
and contaminants.
to remove excess material.
(3) Install bulb in bulb socket.
Alcohol, Isopropyl
6
TT-I-735
Compound, Corrosion Preventive
3
c. Clean affected area with one part Isopropyl
Water-Displacing
Alcohol, TT-I-735 (Volume IV or V, Chapter 2) mixed
MIL-C-81309
with one part fresh water. Use Acid Brush, A-A-289
style optional (Volume IV or V, Chapter 3), with the
(4) Preserve the outside area of the socket,
bristle trimmed back, to assist in cleaning the base of
light assembly bare metal, and hardware by applying
the light socket.
a thin film of Water Displacing Corrosion Preventive
Compound, MIL-C-81309 Type II (Volume IV or V,
d. After cleaning, re-apply Isopropyl Alcohol,
TT-I-735 (Volume IV or V, Chapter 2) solution, to
affected area to flush out remaining residue.
(5) Allow to dry.
e. Wipe with Cleaning Cloth, CCC-C-46 Class 7
(6) Reassemble light assembly lens cover.
(Volume IV or V, Chapter 2).
Touch up bare metal where light assembly mates to
airframe in accordance with paragraphs 5-3.
f. Allow to air dry.
h. Small equipment mounted bulbs should be
NOTE
treated in accordance with paragraphs 6-3.5.a. through
g.
The following procedures are applicable only
to bulbs that are installed into their socket with
i. On lower fuselage light assemblies, where water
a turning, twisting, or scraping motion (e.g.
intrusion is a problem during aircraft washdown,
screw base, bayonet base, or fuse-type clip).
cleaning and application of preservatives shall take
This scraping metal-to-metal contact is needed
place after each aircraft wash down.
to ensure local displacement of the thin,
soft-film formed by the Water Displacing
6-3.6. RELAY AND CIRCUIT BREAKERS. Remove
Corrosion
Preventive
Compound,
corrosion and preserve as follows:
MIL-C-81309 Type III.
g. Preserve light assemblies as follows:
6-26