TB1--1520--251--20--04
g.
Component/Parts in Stock Including War Reserves at All Levels (Depot and Others). N/A
2.
Task/Inspection Suspense Date. Within the next scheduled aircraft Phased Maintenance.
3.
Reporting Compliance Suspense Date. N/A
4.
Summary of the Problem.
a. Rivets have been improperly installed on the left and right (HADS) support housing. The tail boom
also has 2 rivets improperly installed directly under the vertical stabilizer at the fuselage station (FS) 530 Wa-
terline (WL) 139, and Buttline (BL) 00. The HADS rivets were installed with a GP752 single action gun instead
of a Huck 200 double action gun with a 99--600 head. The rivets installed in the Tailboom may be of the wrong
type. The rivets should be inspected and replaced if improperly installed.
b.
For manpower/downtime and funding impacts, see paragraph 12.
c.
The purpose of this TB is to ensure the replacement of improperly installed rivets.
5. End Items to be inspected. AH--64D aircraft. Serial Numbers PVD 1 through PVD 135 (S/N 96--5001
through S/N 99--5135), UK1 through UK11 (S/N ZJ166 through S/N ZJ176), and DN 1 through DN12 (S/N
98--0101 through S/N 98--0112).
6.
Assembly Components to be Inspected.
NOMENCLATURE
PART NUMBER
NATIONAL STOCK NUMBER
Support Housing
7--511140308
N/A
Tailboom Assembly
7--311114000--601
N/A
Parts to be Inspected .
NOMENCLATURE
PART NUMBER
NATIONAL STOCK NUMBER
Rivet
MS90354--0504
5320--00--866--4988
Blind Fastner JO--Bolt/ VIS--
HS5450--05--06
5320--01--243--4302
U--LOC
8.
Inspection Procedures.
a.
The Huck rivets are located on the foward portion of the HADS support housing.
NOTE
Not all AH--64D aircraft will have Huck rivets installed on the HADS support housing.
(1) Inspect the MS90354--0504 Huck rivets for the presence of the locking ring. If the Locking
ring is installed try to rotate the ring with a pair of pliers or equivalent tool. If the ring is missing or the fastener
is loose it should be replaced immediately with an HS5450--05--04 JO--Bolt/ VIS--U--LOC Fastner. IAW para
9.A.
b.
Tailboom inspection for the rivets.
(1) Remove the Intermediate Gearbox fairing L510 and R510 to gain access. Visually inspect
the area behind the Intermediate Gearbox.
(2) The two suspect MS90354 Huck rivets are located underneath the Vertical Stabilizer (FS)
530, Waterline (WL) 139, and Buttline (BL) 00.
(3) If the MS90354 Huck rivets are installed, repair IAW para 9.b. If there are 2 HS5450--05--06
JO--Bolt/ VIS--U--LOC Fastners installed, no further action is required.
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