TB 1--1520--237-20--243
c.
Estimated cost impact to the field.
NOMENCLATURE
PART NO./NSN
QTY.
COST EA.
TOTAL
Pin, Expanding Grip
70103-08107-102
8
8.61
48.88
Pin, Expanding Grip
70103-08107-103
8
8.61
48.88
No NSN Assigned
Total Cost per Aircraft = 48.88
d. TB/MWOs to be applied prior to or concurrently with this inspection. N/A
e. Publications which require change as a result of this inspection.
NOTE
A copy of this TB shall be inserted it the front of the appropriate TM as authority to implement the
change until the printed change is received.
(1) Technical Manual, Preventive Maintenance Services, 10 Hour/14 Day Inspection Checklist
(TM 1-1520-237-PMS-1), sequence number 6.18, (10 Hour/14 Day), change first sub-task to read "Open
handle and check main rotor blade expandable pins for security. Make sure handle is firmly in place over lower
nut when closed. If no resistance is felt on closure, perform main rotor blade pin tension check. If the pin
becomes unseated when the handle is opened or the pin was unseated prior to opening the handle, carefully
raise the main rotor blade, using proper procedures, to remove any binding of the expandable blade pin and
then reseat the pin."
(2) Technical Manual, Preventive Maintenance Services, 10 Hour/14 Day Inspection Checklist
(TM 1-1520-250-PMS-1), sequence number 6.18, (10 Hour/14 Day), change first sub-task to read "Open
handle and check main rotor blade expandable pins for security. Make sure handle is firmly in place over lower
nut when closed. If no resistance is felt on closure, perform main rotor blade pin tension check. If the pin
becomes unseated when the handle is opened or the pin was unseated prior to opening the handle, carefully
raise the main rotor blade, using proper procedures, to remove any binding of the expandable blade pin and
then reseat the pin."
(3) Technical Manual, TM 1-1520-237-23-1, paragraph 1-7-10, every 30 hours. Add a new task
1-17-10.17, titled, "Main Rotor Blade Pin Tension Check", from paragraph 8.b. of this TB, to check main rotor
blade expandable pins for correct tension and security.
(4) Technical Manual, TM 1-1520-250-23-1, paragraph 1.45.9, every 30 hours. Add a new task
1.49.9, titled, "Main Rotor Blade Pin Tension Check", from paragraph 8.b. of this TB, to check main rotor blade
expandable pins for correct tension and security.
13. References.
a. DA PAM 738-751.
b. TM 1-1520-237-23-1
c.
TM 1-1520-237-PMS-1
d. TM 1-1520-250-23
e. TM 1-1520-250-PMS-1
f.
TB 1-1520-237-20-233 (UH-60-01-09)
g. TB 1-1520-237-20-236 (UH-60-01-12)
14. Recording and Reporting Requirements.
a.
Aircraft:
(1) TAMMS Reporting Compliance Suspense.
Upon entering requirements of this message on DA Form 2408-13-1 for all affected aircraft, commanders
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