TB 1--1520--237--20--215
c. The purpose of this TB is to revise TB 1--1520--237--20--212 (UH--60--99--07) to increase the interval
between required inspection of P/N 70103--08112--041/--045 Main Rotor Hub Assembly for cracks in specified
areas from 100 hours to 200 flight hours. This TB does not apply to the 70103--08112--047 Rotary Hub Assem-
bly.
5.
End Items to be inspected. All H--60 aircraft.
6.
Assembly Components to be Inspected.
NOMENCLATURE
PART NUMBER
NATIONAL STOCK NUMBER
Hub, Rotor, Assembly
70103--08112--041
1615--01--096--5427
Hub, Rotor, Assembly
70103--08112--045
(MH--60)
7.
Parts to be Inspected. N/A.
Inspection Procedures.
a. Same as TB 1--1520--237--20--212 and (UH--60--99--ASAM--07).
b. If the Main Rotor Hub Time Since New (TSN) is less than 1,000 hours, annotate the DA Form
2408--5--1 for the Main Rotor Hub and schedule the inspection on the DA Form 2408--18 to accomplish the
inspection IAW paragraph 8.e. or 8.f. (as appropriate) at each subsequent PMS II phase inspection up to
1,000 hours TSN. Upon reaching 1,000 hours TSN, perform the inspection IAW paragraph 8.e. or 8.f. (as
appropriate) at a recurring interval not to exceed 200 hours.
c. If the Main Rotor Hub TSN is more than 1,000 hours and it has been less than 200 hours since the
last Main Rotor Hub NDI inspection (reference paragraph 4.a.) was performed, annotate the DA Form
2408--5--1 for the Main Rotor Hub and schedule the inspection on the DA Form 2408--18 to accomplish the
inspection IAW paragraph 8.e. or 8.f. (as appropriate) and subsequent re--inspections at a recurring interval
not to exceed 200 hours between inspection.
d. If the Main Rotor Hub TSN is more than 1,000 hours and it has been either 200 hours 100 or more
since the last Main Rotor Hub NDI inspection (reference paragraph 4.a.) was performed, or no NDI inspection
has been perform, accomplished the inspection of paragraph 8.e. or 8.f. (as appropriate) within the next 20
flight hours/30 days. Schedule subsequent re--inspections, on the DA from 2408--18, at a recurring interval
not to exceed 200 hours between inspections.
e. Eddy Current Inspection. Same as TB 1--1520--237--20--212 and (UH--60--99--ASAM--07).
f. Fluorescent Penetrant
Inspection
(FPI):
Same
as
TB
1--1520--237--20--212
and
(UH--60--99--ASAM--07).
9.
Correction Procedures.
a. Same as TB 1--1520--237--20--212 and (UH--60--99--ASAM--07).
b. A copy of this TB shall be inserted in th appropriate publications as authority to implement the inspec-
tion.
10. Supply/Parts and Disposition. Same as TB 1--1520--237--20--212 and (UH--60--99--ASAM--07).
11. Special Tools, Jigs and Fixtures Required.
Same as TB 1--1520--237--20--212 and
(UH--60--99--ASAM--07).
12. Application.
a. Category of Maintenance. AVUM/AVIM. Aircraft downtime will be charged to AVUM/AVIM. Eddy
current inspection is only authorized at AVIM level.
b. Estimated Time Required. Same as TB 1--1520--237--20--212 and (UH--60--99--ASAM--07).
c. Estimated Cost Impact of Stock Fund Items to the Field. Same as TB 1--1520--237--20--212 and
(UH--60--99--ASAM--07).
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