[Code of Federal Regulations]
[Title 14, Volume 2]
[Revised as of January 1, 2008]
From the U.S. Government Printing Office via GPO Access
[CITE: 14CFR121.217]

[Page 761]
 
                     TITLE 14--AERONAUTICS AND SPACE
 
CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION 
                               (CONTINUED)
 
PART 121_OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS--
 
              Subpart J_Special Airworthiness Requirements
 
Sec. 121.217  Internal doors.

    In any case where internal doors are equipped with louvres or other 
ventilating means, there must be a means convenient to the crew for 
closing the flow of air through the door when necessary.