TM 1-1520-238-23
E-2
SECTION I. STORAGE AND CORROSION CONTROL GENERAL
INFORMATION
E.1.
DESCRIPTION OF STORAGE CATEGORIES
a. Any component removed for reason of accident shall not be preserved, but shall be shipped in the same
condition it was in after the accident.
b. There are three types of storage:
Flyable, short-term, and intermediate.
(1) Flyable storage assures that the helicopter is maintained for frequent use. Service normal to daily use is
required.
(2) Short-term storage is for 1 to 45 days. This type of storage requires little service to the helicopter while
stored.
(3) Intermediate storage is from 46 to 180 days. This longer time requires preservation services.
E.2.
CORROSION CONTROL
a. Corrosion prevention and control involves keeping moisture, salt-laden air, industrial pollutants, and other
environmental contaminants from contacting exposed metals and non-metals.
b. Corrosion occurs by two methods. They are:
(1) Direct chemical attack.
(2) Electrochemical attack.
c. During storage, preventive maintenance must be applied to ensure effective corrosion control of the helicopter
and related equipment.
d. Corrosion preservation service will retard and/or minimize corrosion of metallic surfaces provided the pres-
ervation/corrosion preventive compounds will displace moisture and prevent permeation of harmful environmental
contaminants.
e. To preserve helicopter exposed surfaces, they must be cleaned well and a barrier of protective coating must be
applied between these surfaces and the moisture in the air.
