(2)
No combustion air duct may restrict the prompt relief of any back.re that, if so restricted, could cause heater failure.
(d)
Heater controls;general. There must be means to prevent the hazardous accumula-tion of water or ice on or in any heater control component, control system tubing, or safety control.
(e)
Heater safety controls. For each combustion heater, safety control means must be provided as follows :
(1)
[Means independent of the components provided for the normal continuous control of air temperature, air.ow, and fuel .ow must be provided, for each heater, to automatically shut o. the ignition and fuel supply of that heater at a point remote from that heater, when any of the following occurs :
(i)
The heat exchanger temperature exceeds safe limits.
(ii)
The ventilating air temperature exceeds safe limits.
(iii) The combustion air.ow becomes inadequate for safe operation.
(iv) The ventilating air.ow becomes inadequate for safe operation.]
(2)
The means of complying with subparagraph (1) of this paragraph for any individual heater must–
(i)
Beindependentof components serving any otherheater whoseheat output is essential for safe operation; and
(ii)
Keep the heater o. until restarted by the crew.
(3) There must be means to warn the crew when any heater whose heat output is essentialfor safe operationhasbeen shut o.by the automatic meansprescri-bedin subparagraph(1) of thisparagraph.
(f)
Air intakes.Each combustionand ventilating airintakemustbewhereno .ammable .uids or vapors can enter the heater system under any operating condition–
(1)
During normal operation; or
(2)
As a result of the malfunction of any other component.
(g)
Heater exhaust. Each heater exhaust system must meet the requirements of Secs. 29.1121 and 29.1123. In addition–
(1)
Each exhaust shroud must be sealed so that no .ammable .uids or hazardous quantities of vapors can reach the exhaust systemsthroughjoints; and
(2)
No exhaust system may restrict the prompt relief of any back.re that, if so restricted, could cause heater failure.
(h)
Heater fuel systems. Each heater fuel system must meet the powerplant fuel system requirements a.ecting safe heater operation. Each heater fuel system component in the ventilating airstream must be protected by shrouds so that no leakage from those components can enter the ventilating airstream.
(i)
Drains. There must be means for safe drainage of any fuel that might accumulate in the combustion chamber or the heat exchanger. In addition–
(1)
Each part of any drain that operates at high temperatures must be protected in the same manner as heater exhausts; and
(2)
Each drain must be protected against hazardous ice accumulation under any operating condition.
Amdt. 29-2, E.. 6/4/67
FAR 29.861 : Fire protection of structure, controls, and other parts.
Eachpartof the structure,controls,and the rotormechanism,and otherpartsessen-tial tocontrolledlanding and(forcategoryA).ightthat wouldbea.ectedbypowerplant .res must be isolated under Sec. 29.1191, or must be–
(a)
For category A rotorcraft, .reproof; and
(b)
[For Category B rotorcraft, .reproof or protected so that they can perform their essential functions for at least 5 minutes under any foreseeable powerplant .re conditions.]
Amdt. 29-30, E.. 4/5/90
FAR 29.863 : Flammable .uid .re protection.
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本文链接地址：FAA规章 美国联邦航空规章 Federal Aviation Regulations 5(54)
