TB 1-1520-238-20-65
2.
Task/lnspection Suspense Date. Within 10 flight hours/14 days.
3.
4.
Summary of the Problem.
a. Due to incorrect serial number effectivity listings in TM 1-1520-238-23P, it is possible that incorrect pin and
servocylinders may have been installed on certain AH-64A Helicopters. A recent mishap investigation revealed that a
shear pin, P/N 7-211514082 was incorrectly installed in a non-bucs active AH-64A aircraft that should have had a sold
pin, P/N 7-232310078-3 installed. If a shear pin has been installed in lieu of a solid pin on anon-bucs active aircraft, a
sheered pin could disable the axis. In addition, if a bucs active servocylinder containing shear pins is installed on a non-
bucs aircraft, a sheared pin could disable the axis.
b. TM 1-1520-238 23P manual has incorrect serial number affectivity for pins and servocylinders and is currently
being changed. Only solid pins, P/N 7-232310078-3, are authorized on aircraft S/N 82-23355 (PV01) through 88-0199
(PV529). Bucs shear pins, P/N 7-211514082, are authorized only on aircraft S/N 88-0200 (PV530) and subsequent.
Bucs active servocylinders are usable only on aircraft SIN 88-0200 (PV530) and subsequent.
c. The purpose of this TB is to require a one time inspection of affected aircraft to ensure that correct
configuration of pin and servocylinders are installed.
5.
End Items to be inspected. All AH64 Aircraft.
6.
Assembly Components to be Inspected.
NOMENCLATURE
PART NUMBER
NATIONAL STOCK NUMBER
Support Assembly, Pilot Collec-
7-311512085-9
1560-01 -252-0380
tive Stick (Spads)
Support Assembly, Copilot
7-311513001 -5/-9
1560-01 -254-7786
Gunner Collective Stick (Spads)
Pilot Cyclic Stick Housing
7-311514075-9
1680-01 -254-7792
(Spads)
Copilot/Gunner Cyclic Sack
7-311515074-9
Housing (Spads)
Pilot Directional Control Spad
7-311517067-7
Assembly (Spads)
Copilot/Gunner Directional
7-311516077-5
1560-01 -248-9904
Control Spad Assembly (Spads)
Pilot Longitudinal Control
7-311517069-5
(Spade)
Servocylinder Collective/Lateral
289300-1001XY
1650-01 -159-0444
289300-1003XY
1650-01 -243-1727
289300-1003XYW
1650-01 -279-4703
289300-1021
1650-01 -279-4703
Servocylinder Longitudinal
308900-1001XY
1650-01 -159-4479
308900-1003XY
1650-01 -242-1497
308900-1003XYW
1650-01 -279-4701
308900-1001 XYW
1650-01 -279-4701
308900-1017
1650-01 -279-4701
Servocylinder Directional
289400-1001XY
1650-01 -159-4480
289400-1001XYW
1650-01 -279-4702
289400-1011
1650-01 -279-4702
2
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