01 March 2005
NAVAIR 01-1A-509-1
TM 1-1500-344-23-1
TO 1-1-689-1
PREVENTIVE MAINTENANCE PROGRAM
2-4. AIRCRAFT PREVENTIVE MAINTENANCE
2-1. OVERVIEW. Investigations during the past ten
PROGRAM.
years have identified corrosion as a major factor in
electronics failure in the field. As much as 30% to 40%
2-4.1. The prevention and control of corrosion on aircraft
of military avionic failures are due to the corrosion
and related equipment is a command responsibility.
process. This is despite steady improvements in reliability
Each command must place special emphasis on the
of avionic systems fielded to date and outlines the need
importance of the corrosion control program and lend its
for an effective preventive maintenance program.
full support to ensure that corrosion prevention and
control receives sufficient priority to be accomplished
2-2. CORROSION PREVENTION PHILOSOPHY.
along with other required maintenance.
Corrosion and environmental conditions are natural
phenomena that adversely affect equipment in field
service. Although never totally eliminated, the problems
these factors cause can be minimized so that they are
less severe and better controlled. This can be achieved
by understanding equipment failure mechanisms and
Train Personnel to Detect, Identify,
Clean, Preserve, Treat
development/utilization of corrosion control technology.
& Prevent Corrosion
2-2.1. As a general rule, maintenance personnel should
assume corrosion is ongoing, regardless of visible
(Re)Emphasize the Concept of All Hands
physical evidence. The aim of corrosion prevention is to
Responsibility for Corrosion Control
enable systems to perform satisfactorily for a specified
time period. In other words, maintenance efforts should
Conduct Required Maintenance
allow equipment to approach its maximum lifetime.
Corrosion Inspections
2-2.2. The general workflow diagram, in Figure 2-1,
defines procedures followed to implement a corrosion
Report Any
preventive maintenance program. This process is
Material/Design Deficiencies
designed to indicate the sequence of events needed to
implement and maintain an effective corrosion
prevention and control program.
NO
Corrosion
Damage Present
2-3. PREVENTIVE MAINTENANCE. The two most
?
important factors in preventing corrosion, and the only
YES
ones which can be controlled by field personnel, are the
removal of the electrolyte and the application of protective
Treat Corrosion Promptly After
coatings. Since the extent of corrosion depends on the
Detection Using the Approved
Materials, Equipment & Techniques
length of time electrolytes are in contact with metals,
aircraft corrosion can be minimized by frequent washing.
If noncorrosive cleaners are used, the more frequently
a surface is cleaned in a corrosive environment the less
Clean, Preserve, & Lubricate
Equipment at Prescribed Intervals
the possibility of corrosive attack. In addition, by
maintaining chemical treatments and paint finishes in
good condition, corrosion can be minimized. The
Maintain Accurate
degradation of non-metallic materials can be minimized
Maintenance Records
by avoiding the use of unauthorized maintenance
chemicals and procedures. In addition, when repair or
replacement of non-metallic materials is required, only
approved materials shall be used. Dedication to proper
Figure 2-1. Corrosion Prevention Program
preventive maintenance practices maximizes equipment
General Workflow Diagram
