TB 1--1520--237--20--231
d. Maintenance Trainers (Category A, and B) -- Comply NLT 6 April 01.
e. Components/Parts in stock at all levels (Depot and others) including War Reserves -- Upon receipt
of this message, Depot and Material Activity Commanders will ensure the material condition tags of all items
in all condition codes listed in paragraph 6 is annotated to read: "TB 1--1520--237--20--231 Inspection of SAS
actuators, not complied with".
(1) Wholesale Stock -- Upon receipt of this message, Depot and Material activity Commanders
will ensure all serviceable items (Condition codes //A//, //B//, //C//, //D//, and //E//) listed in paragraph 6 are
placed in condition code //J// and tagged with a suspended tag/label -- Material, DD Form 1575/DD Form
1575--1. Do not remove original condition tags. Report compliance with this message IAW paragraph 14d(1).
(2) Retail Stock -- Report receipt of this message IAW paragraph 14b. Upon receipt of this mes-
sage, Commanders and Facility Managers maintaining retail stock at installation level and below shall contact
the supported aviation unit to perform the procedures required IAW paragraph 8 and 9 on suspect material.
14d(2).
f. Components/Parts in Work (Depot Level and Others) -- Depot and other Maintenance Activity Com-
manders will ensure items listed in paragraph 6 are not issued until they are in compliance with this message.
2.
Task/Inspection Suspense Date. --
Complete the Inspection IAW paragraph 8
prior to
next flight but NLT
3.
Reporting Compliance Suspense Date. --
Report compliance IAW paragraph 14a NLT 28
Mar 01.
4.Summary of the Problem. --
a. Background Information -- Safety cable is finished with a crimped on steel ferrule. Use of safety
cable in place of safety wire on SAS actuators has occurred on some aircraft. Contact between the safety
cable ferrules and actuator output connecting links may occur resulting in gouging. The gouging could lead
to failure of the connection link and loss of control effectiveness.
c. The purpose of this TB is to -- Inspect SAS actuators for installation of safety cable and possible
damage.
5.End Items to be inspected. -- All H--60 series aircraft.
6.Assembly Components to be Inspected.--
NOMENCLATURE
PART NUMBER
NSN
ROLL TRIM ASSEMBLY
70410--02450--045
1560--01--087--1675
ROLL TRIM ASSEMBLY
70410--02450--046
1560--01--087--1675
ROLL TRIM ASSEMBLY
70410--02450--048
1560--01--081--0590
ROLL TRIM ASSEMBLY
70410--02450--049
1560--01--128--1759
ROLL TRIM ASSEMBLY
70410--22760--050
6615--01--158--5986
PITCH TRIM ACTUATOR ASSY
70410--02760--046
1680--01--101--4097
PITCH TRIM ACTUATOR ASSY
70410--02760--047
1680--01--137--3533
YAW BOOST SERVO ASSY
70410--02910--067
1650--01--136--5496
YAW BOOST SERVO ASSY
70410--22910--045
6615--01--158--5985
FLIGHT CONTROL MODULE
70410--02650--047
1560--01--088--3224
SAS ACTUATOR
70410--02500--047/048
1560--01--083--6813
SAS ACTUATOR
70410--02500--049
1560--01--129--1256
SERVOCYLINDER (MH--60K)
70410--22910--045
6615--01--158--5985
2