BU-54 › Historical Revision Information
Code Symbols for Chromium Plates Aircraft Engine Cylinders (Specification No. 20031)

BU-54 - REVISION A - SUPERSEDED
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Code Symbols for Chromium Plates Aircraft Engine Cylinders (Specification No. 20031)


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Document Number

BU-54

Revision Level

REVISION A

Status

Superseded

Publication Date

Jan. 1, 1960