Combustion
Heaters
(a) Before
installation, combustion heaters should be inspected, and when necessary,
pressure tested in the manner prescribed in the Aircraft Maintenance Manual to
ensure that no fuel or combustion products leak into the cabin air supply
(b) Heaters should
be installed in the manner specified in the Aircraft Maintenance Manual
concerned, taking care that air and fuel leakages do not occur at duct joints
or connections. There should be no connection between the combustion air and
cabin air supplies and no leakage of air or exhaust gas into the aircraft.
(c) Equipment
associated with the heating system such as flow valves, air regulators,
thermostatic devices and ducts should be correctly interconnected, and
mechanical movements, flows and temperature settings checked and adjusted.
(d) After
the installation of a heater the system should be ground tested in the manner
specified in the relevant Aircraft Maintenance Manual.
NOTE: Unburnt fuel or fuel vapour
should not be allowed to accumulate within the combustion system or aircraft
particularly during component functioning tests
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