AC:27-1 certification of normal category rotorcraft. 

 - [Washington, D.C.,  1985]. 
 - v. 
<br/><br/> Aug. 29, 1985.  CRDP Program Historic Shelflist record. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rotors (Helicopters)--Standards--United States.
<br/><br/><label>Gov. Doc. Class. No.: </label>TD 4.8/5:27-1