(a) Each extinguishing agent container must have a pressure relief to
prevent bursting of the container by excessive internal pressures.
(b) The discharge end of each discharge line from a pressure relief
connection must be located so that discharge of the fire extinguishing
agent would not damage the rotorcraft. The line must also be located or
protected to prevent clogging caused by ice or other foreign matter.
(c) There must be a means for each fire extinguishing agent container
to indicate that the container has discharged or that the charging
pressure is below the established minimum necessary for proper
(d) The temperature of each container must be maintained, under
intended operating conditions, to prevent the pressure in the container
(1) Falling below that necessary to provide an adequate rate of
(2) Rising high enough to cause premature discharge. (Secs.
313(a), 601, and 603, 72 Stat. 759, 775, 49 U.S.C. 1354(a), 1421, and
1423; sec. 6(c), 49 U.S.C. 1655 (c))