TB 1-1520-238-20-110
e.
Maintenance Trainers (Category A and B). Same as para 1a.
f. Component/Parts in Stock at All Levels (Depot and Others) Including War Reserves. Upon receipt
of this message, depot and materiel activity commanders will ensure the materiel condition tags of all items
in all condition codes listed in paragraphs 6 and 7 are annotated to read: "AH--64--01--ASAM--01 (TB
1--1520--238--20--110) not complied with."
(1) Wholesale Stock. N/A.
(2) Retail Stock. Upon receipt of this message, commanders and facility managers maintaining
retail stock at installation level and below shall contact the supported aviation unit to perform the procedures
g.
Components/Parts in Work (Depot Level and Others). N/A.
2.
Task/Inspection Suspense Date. Complete the inspection IAW paragraph 8 on or
before the next 10
hour/14 day inspection but NLT 25 Oct 2000 and report IAW para 14b.
Reporting Compliance Suspense Date.
Report compliance IAW para 14a NLT 1 Nov
2000.
4.
Summary of the Problem.
a. APU fuel hose assembly part number (P/N) 7--211643064 (rubber inner tubing material) can rupture,
spraying fuel into the APU compartment. The hose supplier discovered a problem with the material com-
pound of specific groups of fuel hose assemblies. The affected hose assembly is subject to premature aging
caused by exposure to elevated temperatures. There has been one recorded AH--64 incident of an APU
compartment fire due to premature aging of the APU fuel hose assembly.
b.
c.
The purpose of this TB is to:
(1) Inspect the APU fuel hose assembly P/N 7--211643064 for leakage.
(2) Replace the APU fuel hose assembly P/N 7--211643064 with a new hose P/N
7--211643064--3 on or before 11 Apr 2001.
(3) Add AH--64A APU fuel solenoid valve inspections to TM 1--2835--213--23 IAW paragraph 12e
of this TB.
(4) Add a warning to the AH--64D IETM, TM 1--1520-- Longbow/Apache and the AH--64A TM
(5) Implement recurring inspections of the APU fuel hose assembly P/N 7--211643064 for leak-
age.
5.
End Items To Be Inspected .
All AH--64 series aircraft.
Assembly Components To Be Inspected.
Nomenclature
Part Number
NSN
Auxiliary Power Unit
7--211651002--5
2835--01--172--6200
Auxiliary Power Unit
7--511651002--7
2835--01--475--0646
7.
Parts To Be Inspected .
Nomenclature
Part Number
NSN
Hose Assembly
7--211643064
4720--01--186--4418
Inspection Procedures.
a.
Safe the aircraft per TM 1--1520--238--23 or the IETM.
b.
Remove APU upper center cover.
2