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Library - Directive History
N PD 7900 4C Need help?
Subject: NASA Aircraft Operations Management
Responsible Office Code: LD1
Effective Date: April 8, 2009
Expiration Date: August 8, 2014
Cancellation Date: April 27, 2004 
Document Cancelling this Directive (if Cancelled): N PD 7900 4B
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Documents Cancelled by this Directive:
N PD 7900 4B   -   Show History
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