NAVAIR 01-1A-509-3
01 March 2005
TM 1-1500-344-23-3
TO 1-1-689-3
CHAPTER 1
INTRODUCTION
This volume was prepared under the technical cognizance of the
Chemistry and Materials Division, NAVAIR China Lake, China Lake, California.
GENERAL.
1-1.3. The types of corrosion that occur on avionic
equipment are similar to those found on airframe
1-1.1. Today's military avionic systems assume a
structures. The difference between avionic and airframe
significant share of the responsibility for mission
corrosion is that small amounts of corrosion in avionic
completion, performance capability, and overall system
equipment can cause intermittent malfunction or
safety. The role of avionics includes mission essential
complete failure, while it may not impact airframe
equipment, flight critical equipment, and aircraft
structures.
hardware. For example, navigation, communications,
electronic warfare, weapon management, flight/engine
PURPOSE. The purpose of this manual is to
controls and displays, and wiring are all considered
provide information on materials and procedures to
avionics. Electronics and electrical power systems are
prevent, control, and repair corrosion damage to avionics
also considered avionics. The reliability of these complex
on land or at sea.
systems in any environment is critical for aircraft flight
and mission essential functions.
SCOPE. The material in this manual contains
basic avionic corrosion prevention and corrective
m a i n t e n a n c e information to be used at the
NOTE
Organizational/Unit and Intermediate levels.
In this manual, use of the term "avionic systems"
shall refer to any device that uses electrical
ARRANGEMENT OF MANUAL.
power. The term "avionic technician" shall
include the aviation electrician, aviation
1-4-1. A complete set of manuals to perform avionics
electronic technician, or any personnel
and electronics cleaning and corrosion control functions
authorized to perform maintenance on avionic
consists of Volumes I, III, and IV (Navy and Army) or
systems.
Volumes I, III, and V (Air Force).
1-1.2. Corrosion is a major cause of avionic
1-4.2 Arrangement of Volume III. Volume III consists
equipment failures, particularly while installed in military
of ten chapters, arranged as shown in Table 1-1.
aircraft. In many cases, even minute amounts of
corrosion can cause intermittent malfunction or
RELATED PUBLICATIONS. Tables 1-2
complete failure of the equipment. Past experience
(Navy), 1-3 (Air Force), 1-4 (Army), and 1-5 (Other) list
shows that in order to obtain certain electrical
t e c h n i c a l publications that may be used as
characteristics, for example, low electromagnetic
supplemental references by personnel involved in
interference (EMI), a compromise in the design
cleaning and corrosion control.
selection of materials might be needed (for example,
the use of conductive adhesive). Sometimes such
C O N S U M A B L E S AND EQUIPMENT .
compromises can lead to corrosion problems that are
Procurement information for ordering consumables and
aggravated by exposure to varying environmental
equipment referenced in this volume may be found in
conditions (for example, EMI corrosion). Avionic
Volume IV (Navy and Army) or Volume V (Air Force) of
e q u i p m e n t is routinely exposed to varying
this manual.
environmental conditions. These conditions include
changing temperatures and pressures, varying
humidity, dust, dirt, and industrial pollutants in the
atmosphere that often initiate corrosion.
