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MAINTENANCE MANDATORY, RCS CSGLD--1--1860(R1), ALL H--60A AIRCRAFT, TAIL NUMBERS 77--22720 THROUGH 82--23746, THAT HAVE BEEN REFURBISHED, ONE TIME INSPECTION OF WIRE HARNESS CONNECTING THE NO. 1 AND NO.2 JUNCTION BOXES
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TB-1-1520-237-20-224 RCS CSGLD-1-1860(R1) H-60A Aircraft Tail Numbers 77-22720 THROUGH 82-23746 Wire Harness Manual
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Inspection Procedures. - TB-1-1520-237-20-2240003
TB 1--1520--237--20--224
d. Aircraft in transit.
(1) Surface/air shipment. Same as para 1a.
(2) Ferry status.
(a) Same as para 1a.
(b) Sikorsky will inspect DD Form 250 aircraft prior to those aircraft departing for ferry to final
destination.
e. Maintenance trainers (Category A and B). Same as para 1a.
f.
Component/Parts in Stock at All Levels (Depot and Others), Including War Reserves. N/A
g. Components/Parts in Work (Depot Level and Others). N/A
2.  Task/Inspection Suspense Date. Complete the inspection IAW paragraph 8 within the next 10 flight
hours but NLT 15 September 2000 and report IAW para 14b.
3.
Reporting Compliance Suspense Date. Report compliance IAW para 14a NLT 22 September 2000.
4.
Summary of the Problem.
a. Several field units have reported finding chafing and burn marks on two adjacent AC electrical power
wire harnesses that run from the No. 1 junction box to the No. 2 junction box. The burn marks were the result
of electrical arcing caused by chafing of the wire shielding. The chafing was the result of the harnesses being
installed without a required mounting plate (wire saddle) during replacement of the Kapton Wiring. Replace-
ment of the Kapton Wiring was accomplished as part of the refurbishment program (MWO
1--1520--237--55--7).
b. For manpower/downtime and funding impacts see para 12.
c.
The purpose of this TB is to:
(1) Inspect all suspect aircraft for evidence of chafing and burn marks on the wire harness and
relay panels.
(2) Repair any damage that is found.
(3) Ensure the required mounting plate is installed to prevent future damage.
5.  End Items to be inspected. UH--60A aircraft serial number 77--22720 through 82--23746 that have
been refurbished.
6.
Assembly Components to be Inspected. N/A
7.
Parts to be Inspected.
NOMENCLATURE
PART NUMBER
NSN
Wire Harness
70552--02109--065
N/A
Wire Harness
70552--02109--066
N/A
Mounting Plates
TC--92
5340--00--728--1389
Left Hand Relay Panel
70552--02105--043
5945--01--101--4073
70552--02105--045
5345--01--108--3512
70552--02105--048
5945--01--129--7331
70552--02105--050
5945--01--129--7331
70552--02105--051
5945--01--221--0478
70552--02105--054
5945--01--289--2695
2

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