MD Helicopters 369-500, Инструкция по техническому обслуживанию

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CSP-HMI-3
MD Helicopters, Inc
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MAINTENANCE MANUAL
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1999 − 2016 by MD Helicopters, Inc.
10. Heated Pitot Tube Inspection
Before commencing an inspec­
tion or repair, set BAT/OFF/
EXT PWR or master helicopter primary
power switch (S2) to OFF and set PITOT
HEAT or PITOT HTR circuit breaker switch
to OFF.
(1). Examine open end of pitot tube for
foreign matter, insects etc. Inside of
tube must be clean and free of foreign
objects.
(2). Inspect condition of canopy panel-to-
pitot tube sealing grommet (Ref.
Figure 201, Figure 202 or Figure 203).
Replace melted or cracked grommet
(Ref. Canopy Grommet Replacement).
(3). Inspect pitot tube for flats or dents. A
dent or flat which exceeds a 10%
reduction of the tube diameter will
require repair or replacement of the
tube.
(4). Inspect pitot tube for misalignment.
The pitot tube must be parallel to the
longitudinal axis of the helicopter.
Variance must not exceed 1 degree.
(5). For 369D, perform the following
inspection:
(a). Examine security of clamp attaching
pitot tube to instrument panel lower
support assembly.
(b). Examine security of ty-base attach­
ing pressure tube to helicopter
structure.
(c). Inspect ground terminal E24 for
tightness.
NOTE:
Ground terminal E24 is located on the
electronic compartment lower section left
frame.
(6). For 369E/FF - 500/600N, perform the
following inspections:
(a). Examine security of clamp attaching
pitot tube to support bracket.
(b). Examine security of pitot tube
support bracket to helicopter struc­
ture.
(c). Inspect ground terminals E54 and
E56 for tightness.
NOTE:
Ground terminal E54 is located on the
lower instrument panel support and ground
terminal E56 is located on the pitot tube
support bracket.
(7). Inspect pressure tube for cracks or
holes.
(8). Inspect pressure tube fittings for
tightness.
(9). Inspect pitot tube insert for tightness.
(10). Inspect wires for damage and deterio­
rated insulation.
(11). Inspect wire terminations for broken
strands and loose swaging.
(12). Inspect PITOT HEAT circuit breaker
switch or PITOT HTR circuit breaker
switch for security of attachment to its
respective panel and for security of wire
attachments to circuit breaker.
(13). Inspect knife splice (SP140) for security
of connection, torn tubing and cracked
or broken tie straps.
11. Heated Pitot Tube Repair
These repair guidelines are applicable to
factory-installed heated pitot tubes and field
installations performed strictly according to
instructions (Ref. Initial Installation).
(1). Repairs consist of removal and replace­
ment of defective components.
(2). Use standard shop practices for
cleaning and soldering or swaging
electrical connections.
(3). Use clean, dry compressed air to
remove dust.
(4). Wash adjacent interior structures with
solvents which are inert with respect to
the surfaces to which they will be
applied, and dry with clean, dry
compressed air.
(5). Refer to CSP-IPC-4 for replacement
part numbers and nomenclature.
CAUTION