MD Helicopters 369-500, Maintenance Instructions Manual

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CSP-HMI-3
MD Helicopters, Inc
.
MAINTENANCE MANUAL
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Neither this document nor any part hereof may be reproduced or transferred to
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purpose except as specifically authorized in writing by MD Helicopters, Inc.
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1999 − 2016 by MD Helicopters, Inc.
B. Single Wire and Shielded Wire Damage
Limitations
(Ref. Table 601 and Table 602)
NOTE:
This procedure contains instructions for
inspecting non-shielded wire and cables
containing shielded wire. Not all steps are
applicable.
(1). Visually inspect wire or cable insulation
for damage. Insulation which shows
cuts, punctures, burns, or which expose
the conductor or shield are unaccep­
table.
(a). If conductor or shield strand damage
are within limits, perform Wire
Insulation Repair procedure
(Ref. Wire Repair).
(2). Visually inspect conductors for nicks,
cuts, scrapes, breaks, or other damage
to strands.
(a). Damage shall not exceed limits
specified in Table 601.
Table 601. Conductor Damage Limits
Strand
Number
Max. Allowable
Nicked/Broken Strands
1 − 18 0 nicked or broken
19 − 36 2 nicked, 0 broken
37 4 nicked, 0 broken
Above 37 6 nicked or broken
(3). Visually inspect individual and group
shields for broken strands. Additional
nicks, scrapes, or other damage which
does not sever the individual shield
strands is acceptable.
(a). Damage shall not exceed limits
specified in Table 602.
(b). If damage does not exceed limitation,
perform Open Circuit Test procedure
to verify non-visible damage does not
exist.
Table 602. Broken Shield Strand Allowance
Number of
Component Wires
in Cable
Max. Allowable Broken Strands
(24 and 22 AWG)
Max. Allowable Broken Strands
(20, 18, and 16 AWG)
1 10 15
2 or 3 15 20
4 20 25
5, 6 or 7 22 30