TB 1-1520-238-20-120
e. Component/Parts in Stock at All Levels (Depot and Others) Including War Reserves. N/A.
f.
Components/Parts in Work (Depot Level and Others). N/A.
2. Task/Inspection Suspense Date. Complete the inspection IAW paragraph 8 before the next flight but
NLT 1 November 2001 and report IAW para 14a(2) NLT 5 November 2001.
3.
Summary of the Problem.
a. AH--64--01--06 and AH--64--01--07 were issued requiring an initial and recurring inspection of the
transmission rotor support strut assembly barrel nuts. This message supercedes the procedures required
in AH--64--01--06 and AH--64--01--07.
b. For manpower/downtime and funding impacts, see paragraph 12.
c.
The purpose of this TB is to:
(1) Require a torque inspection before the next flight of all 4 bolts used to attach the 4
transmission rotor support strut assemblies to the deck for aircraft not inspected by SOF
AH--64--01--06/07.
(2) Require a visual inspection of the 4 transmission rotor support strut assembly barrel nuts
and bolts, and lower the torque from 3500 inch pounds to 1900 inch pounds, on or before the next 125
hour inspection interval, but NLT 1 November 2001.
(3) Require a recurring transmission rotor support strut assemblies bolt torque check.
(4) Remove and replace all hardware, other than HS5813--12 barrel nuts and
HS4243V12H62/34 or HS4243--12H62/34 bolts NLT 2 August 2003.
5.
End Items To Be Inspected.
All AH--64 series aircraft.
6.
Assembly Components To Be Inspected.
Nomenclature
Part Number
NSN
Support Installation, Rotor
7--3111160005
N/A
Frame Installation (FS 230)
7--311113220
N/A
Frame Installation (FS 230)
7--311113220--601
N/A
Bulkhead Instl/Assy (FS 176)
7--311113180--601
N/A
Parts To Be Inspected.
NOTE
Some bolts and nuts may be marked with vendor P/N's that are listed in
Nomenclature
Part Number
NSN
Bolt, Shear
HS4243V12H34
5306--01--457--3397
(Vendor part numbers, MC4243V12H34, PBF1446V12H34, SL8351V12H34,
76924V12H34, and AIC6924V12H34)
Bolt, Shear
HS4243--12H34
5306--01--296--6421
(Vendor part numbers, MC424312H34,
PBF144612H34,
SL835112H34,
7692412H34, and AIC692412H34)
Bolt, Shear
HS4243V12H62
5306--01--456--1055
(Vendor part numbers, MC4243V12H62, PBF1446V12H62, SL8351V12H62,
76924V12H62, and AIC6924V12H62)
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