AS-391 Complete Document History
Airspeed Indicator (Pitot Static) (Reciprocating Engine Powered Aircraft)

Complete Current Edition:
   REVISION C R08 - REAFFIRMED NONCURRENT - Feb. 1, 2008

Obsolete Revision Information:
   REVISION C - REAFFIRMED IN 1984, 91, & 93 - Nov. 1, 1960