TB 1--1520--238--20--95
(4) Perform magnetic particle inspection on all basic and --3 nuts each time they are removed.
Submit a set of completed DA Form 2410 each time.
(5) If you cannot positively identify the part number of the main rotor retention nut, perform mea-
surement in paragraphs 8.b. and 8.c. If still unsure, treat as a basic or --3 part.
(6) All newly acquired nuts must be inspected prior to installation.
9.
Correction Procedures.
a. If any cracks are detected in the main rotor retention nut, notify the technical point of contact at para-
b. Replace cracked retention nuts with P/N 7--311411102--5 nuts.
10. Supply/Parts and Disposition .
a. Parts Required. Retention nut P/N 7--311411102--5 NSN 5310--01--350--1346.
b. Requisitioning Instructions. Requisition replacement parts for cracked nuts only. Submit AOG req-
uisitions verified by the cognizant AMCOM Aviation Logistics Assistant Representative (LAR) for replace-
ment parts using normal supply procedures. All requisitions shall use project code (CC 57--59) "XFN", "X--
RAY--FOXTROT--NOVEMBER".
NOTE
Project code "XFN", "X--RAY--FOXTROT--NOVEMBER" is required to track and establish a data-
base of stock fund expenditures incurred by the field as a result of SOF actions.
c.
Bulk and Consumable Materials.
NOMENCLATURE
PART NUMBER
NATIONAL STOCK NUMBER
Nut, Self--Locking
P/N HS5489--9
NSN 5310--00--395--4643
Nut, Self--Locking
P/N HS5489--9
NSN 5310--01--456--1525
d. Disposition. Hold any discrepant part/component pending disposition instructions from logistical
point of contact in paragraph 16.b.
e. Disposition of Hazardous Material. In accordance with environmental protection agency directives
as implemented by your servicing environmental coordinator (AR 200--1).
11. Special Tools and Fixtures Required. As required.
12. Application.
a. Category of Maintenance. AVUM to remove and replace. AVIM or above for inspection. Aircraft
downtime will be charged to AVIM maintenance.
b. Estimated Time Required.
(1) For Removal/Replacement.
(a) Total of 20 man--hours using 2 persons.
(b) Total of 10 hours downtime for one end time.
(2) For Inspection.
(a) Total of 1 man--hour using 1 person.
(b) Total of 1 hour downtime for one end item.
c.
Estimated Cost Impact to the Field.
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,100.00
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