TB1--1520--238--20--108
f.
Component/Parts in Stock Including War Reserves at All Levels (Depot and Others). N/A
2.
Task/Inspection Suspense Date. Within 10 Flight hours but NLT 31 May 2000.
3.
4.
Summary of the Problem.
a. The Linear Voltage Differential Transducer (LVDT) connectors on the servocylinders have a
minimum torque for disengagement (removal) of 2 in-lb. The removal torque on some connectors is suspect
and has been found to be below the required 2 in-lb. The connectors have been installed on both Back-Up
Control System (BUCS) and non-BUCS servocylinders. The repair procedure will require lockwire to be
applied to the LVDT connectors at the aircraft interface. The lockwire will prevent the LVDT connector from
separating from the airframe connector.
b. For manpower/downtime and funding impacts, see paragraph 12.
c. The purpose of this TB is for the installation of safety wire to the LVDT connector to ensure the con-
nector cannot unseat.
5.
End Items to be inspected. All AH--64 aircraft.
6.
Assembly Components to be Inspected.
NOMENCLATURE
PART NUMBER
NATIONAL STOCK NUMBER
Servocylinder
7--311820011 -- (all dash #'s)
1650--01--159--0444
1650--01--273--7610
1650--01--279--4703
1650--01--243--1727
Servocylinder
7--311820012 -- (all dash #'s)
1650--01--159--4479
1650--01--273--7609
1650--01--279--4701
1650--01--242--1497
Servocylinder
7--311820014 -- (all dash #'s)
1650--01--273--7608
1650--01--279--4702
7.
Parts to be Inspected.
NOMENCLATURE
PART NUMBER
NATIONAL STOCK NUMBER
Connector, Plug, Electrical
MS27467T9B35P
5935--01--045--2968
Connector, Plug, Electrical
MS27467T9B35PA
5935--01--045--0166
Inspection Procedures.
a. Inspect all servocylinder LVDT connectors for installed safety wire. If safety wire is installed,
inspection is complete and no further action is required, the red dash //--// may be signed off.
b. If no safety wire is installed on the servocylinder LVDT connector, proceed with the correction
procedures in para 9.
2
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