NAS-1638 › Complete Document History
Cleanliness Requirements of Parts Used in Hydraulic Systems

Complete Current Edition:
   REVISION 4 - INACTIVE FOR NEW DESIGN - Dec. 22, 2011

Obsolete Revision Information:
   REVISION 3 - INACTIVE FOR NEW DESIGN - USE AS-4059 - Aug. 1, 2001
   REVISION 2 - CLEANLINESS REQUIREMENTS OF PA - March 28, 2001
   REVISION 1 - CLEANLINESS REQUIREMENTS OF PA - March 1, 2001
   1992 EDITION - CLEANLINESS REQUIREMENTS OF PA - June 30, 1992
   1964 EDITION - REAFFIRMED IN 1981 - Jan. 30, 1964