TM 5-5420-228-24
INTRODUCTION - Continued
(7) Corrosion. Check for corrosion on entire launcher. Become familiar with the four stages of
corrosion listed below and take the appropriate maintenance action required outlined below.
Red, black, or white corrosion deposits on surface with etching or pitting.
Stage 1-
However, base metal is sound.
Powdered granular or scaled condition. Base metal is sound.
Stage 2-
Stage 3-
Surface condition is similar to stage 2 except that metal in the corroded
area is unsound and pin holes may be present.
Stage 4-
No metal remaining at point of severest corrosion. Corrosion holes in the
area or metal completely worn away.
Stages 1 & 2- Areas are to be cleaned, primed, and painted IAW TB 43-0213.
Stages 3 & 4- Try to repair metal. If not economical or reparable, replace with new parts.
INITIAL SETUP
Preventive maintenance includes complete inspection to make sure adjustment, securing, and
assembly of all parts of the launcher are correct. All cleaning, replacement, lubrication, and
protection of parts or assemblies must be done as stated for trouble-free operation until the
next preventive maintenance is performed.
Maintenance Forms and Records. Refer to DA PAM 738-750.
Publications. Be sure all needed publications are on hand before starting task.
Special Tools. Be sure all special tools are on hand.
Supplies. Be sure all parts and supplies are on hand.
Tools. Be sure all common tools are on hand.
Modification Work Order (MWO) Application. Check the list of current MWO's in DA PAM
25-30. Do not make any launcher modifications except as ordered by official Army directive.
Change 2
