TB 1--1520--238--20--129
(2) Retail Stock -- N/A.
f. Component/Parts in Stock Including War Reserves at All Levels (Depot and Others). Items listed
in paragraphs 6 and 7 in work will not be issued until compliance with this TB..
g. Component/Parts in Stock Including War Reserves at All Levels (Depot and Others). N/A.
125 hour special inspection, which ever occurs first.
3.
TAMMS Reporting Compliance Suspense Date. Report compliance IAW 14a(1) NLT 3 Sep 02.
4.
Summary of the Problem.
a. History-- TB 1--2835--216--20--2 (AH--64--99--03) was issued to require special 50 and 125 hour re-
curring inspections of the APU clutch. Since the issue of that TB, an APU clutch failed in flight causing a fire
in the transmission bay. The aircraft was safely landed but was destroyed by fire.
b. For manpower/downtime and funding impacts, see paragraph 12.
c.
The purpose of this TB is to:
(1) To supersede the requirements for the 50 hour and 125 hour recurring inspections IAW TB
1--2835--216--20--2 (AH--64--99--03).
(2) Rescind the information provided in AH--64 MIM 01--015.
(3) Prior to next flight, conduct a records check to determine when the next 50hour or 125 hour
special inspection is due.
(4) Require a new 50 hour recurring APU clutch inspection to be implemented at the next 50 hour
or 125 hour special inspection, whichever occurs first. This inspection will replace the current 50 and 125
hour special clutch inspections.
(5) Add a 10 hour/ 14 day preventive maintenance service (PMS) inspection for the APU anti--flail
and driveshaft.
5.
End Items to be inspected. All AH--64 series aircraft.
6.
Assembly Components to be Inspected. N/A
NOMENCLATURE
PART NUMBER
NATIONAL STOCK NUMBER
Auxiliary Power Unit
7--211651002--5
2835--01--172--6200
Auxiliary Power Unit
7--511651002
TBD
7.
Parts to be Inspected.
PART NUMBER
NATIONAL STOCK NUMBER
NOMENCLATURE
Clutch Assembly, APU
3886000--5
2835--01--164--5786
8.
Inspection Procedures.
a. Initial Inspection--
(1) Prior to the next flight-- inspect the DA Form 2408--18 to determine when the next 50/125 hour
inspection is due.
NOTE
For ULLS--A units the inspection numbers are:
AH--64A-- Inspection number A223.
AH--64D-- Inspection number A131.
(2) All AH--64 aircraft will be inspected as required IAW paragraph 8b of this TB at the next sched-
uled 50 hour special inspection or scheduled 125 hour special inspection which ever occurs first.
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