[Code of Federal Regulations]
[Title 14, Volume 1]
[Revised as of January 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 14CFR31.19]

[Page 764]
 
                     TITLE 14--AERONAUTICS AND SPACE
 
CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
 
PART 31_AIRWORTHINESS STANDARDS: MANNED FREE BALLOONS--Table of Contents
 
                      Subpart B_Flight Requirements
 
Sec.  31.19  Performance: Uncontrolled descent.

    (a) The following must be determined for the most critical 
uncontrolled descent that can result from any single failure of the 
heater assembly, fuel cell system, gas value system, or maneuvering vent 
system, or from any single tear in the balloon envelope between tear 
stoppers:
    (1) The maximum vertical velocity attained.
    (2) The altitude loss from the point of failure to the point at 
which maximum vertical velocity is attained.
    (3) The altitude required to achieve level flight after corrective 
action is inititated, with the balloon descending at the maximum 
vertical velocity determined in paragraph (a)(1) of this section.
    (b) Procedures must be established for landing at the maximum 
vertical velocity determined in paragraph (a)(1) of this section and for 
arresting that descent rate in accordance with paragraph (a)(3) of this 
section.

[Amdt. 31-4, 45 FR 60179, Sept. 11, 1980]