TB 1-1520-238-20-112
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 TB, 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--02 (TB
1--1520--238--20--112) Main Rotor Pitch Housing Retirement Life, not complied with."
(1) Wholesale Stock. Upon receipt of this TB, depot and materiel activity commanders will en-
sure all serviceable items (Condition Codes //A//, //B//, //C//, //D//, and //E//) listed in paragraphs 6 and 7 are
placed in condition code //J// and tagged with a suspended tag/label -- materiel, DD Form 1575/DD Form
1575--1. Do not remove original condition tags. Report compliance with this TB IAW paragraph 14d(1).
(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
required IAW paragraphs 8 and 9 on suspect materiel. Dispose of discrepant materiel IAW paragraph 10.
Report compliance with this TB IAW paragraph 14d(2).
g. Components/Parts in Work (Depot Level and Others). Depot and other maintenance activity com-
manders will ensure items listed in paragraphs 6 and 7 are not issued until they are in compliance with this
TB.
2.
a.
AH--64D aircraft -- prior to next flight but NLT 25 Oct 2000 and report IAW para 14b.
b.
AH--64A Aircraft -- within the next 10 flight hours but NLT 25 Oct 2000 and report IAW para 14b.
3.
4.
Summary of the Problem.
a. AH--64 Main Rotor Pitch Housings have been assigned a retirement life of 1193 hours. The AH--64A
ISAQ Revision 7 dated 8 Feb 2000 allows AH--64A models only to extend that time to 1553 hours through
23 Feb 2001. Some pitch housings have been issued incorrectly indicating a retirement life of 1553 hours.
Some of these high time pitch housings may have been issued to units with AH--64D Longbow aircraft. There
also appears to be a misinterpretation of the AH--64A ISAQ Revision 7 grace period.
b.
For manpower/downtime and funding impacts, see paragraph 12.
c.
The purpose of this TB is to:
(1) Verify that all pitch housings having more than 1193 hours are removed from AH--64D aircraft
prior to next flight.
(2) Identify all AH--64 A and D pitch housings by aircraft, component serial number and current
flight hours.
(3) Collect and report accurate data relating to pitch housing lives installed on all fielded aircraft.
5.
End Items To Be Inspected .
All AH--64 aircraft.
Assembly Components To Be Inspected.
Nomenclature
Part Number
NSN
Head, Rotary Wing
7--311411003--ALL
1615--01--148--1525
7--311411003--601
N/A
7--311411003--605
1615--01--209--9169
7--311411003--607
1615--01--245--3148
7--311411003--609
1615--01--249--3989
7--311411003--611
1615--01--306--6948
2
