I have found many US aircraft have casting numbers in their aluminum parts, bosses, tools, to identify the specific aicraft. 28 is a PBY, I believe. Is there a book or database on these, and when this all started?
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Sign up to join this communityI have found many US aircraft have casting numbers in their aluminum parts, bosses, tools, to identify the specific aicraft. 28 is a PBY, I believe. Is there a book or database on these, and when this all started?
28-
(rather than just28
) is the prefix for the PBY – sempaiscuba Jun 5 '19 at 18:34