TB 1-1520-238-20-120
(b) Total of 2 hour downtime per end item.
(2) To remove and install the barrel nuts --
(a) Total of 4 man--hours using 2 persons to remove and reinstall the ammunition magazine.
(b) Total of 16 man--hours using 2 persons to remove and reinstall all four barrel nuts using
air vehicle sling.
(c) Estimated 10 hours downtime per end item not including time required for MOC.
c.
Estimated Cost Impact to the Field.
Nomenclature
Part No/NSN
QTY
Cost Each
Total
Barrel Nut
HS5813--12
2
6.04
2.08
5310--01--463--1740
Bolt
HS4243V12H34
2
654.56
1309.12
5306--01--457--3397
Barrel Nut
7--311113224
2
158.20
316.40
5310--01--305--2544
Bolt
HS4243V12H62
2
318.32
636.64
5306--01--456--1055
Total cost per aircraft = 14.24
d. TB/MWOs To Be Applied Prior To Or Concurrently With This Inspection. N/A.
e. Publications Which Require Change As a Result of This Inspection. A copy of this TB shall be
inserted in the appropriate publication as authority to implement the change until the printed change is
received.
(1) Interactive Electronic Technical Manual (IETM): TM 1--1520--Longbow/Apache IETM, CD
No. 1, Version 3.1.2, dated 19 Nov 98, Cd date 1 Dec 98 or subsequent.
(2) TM 1--1520--238--23P, Aviation Unit and Intermediate Maintenance Repair Parts and
Special Tools List for AH--64A Apache Attack Helicopter, 27 March 95.
(3) TM 1--1520--238--23, Aviation Unit and Intermediate Maintenance Manual for AH--64A
Apache Attack Helicopter, 16 May 94.
13. References. --
a. DA Pam 738--751, 15 Mar 1999, Functional Users Manual for the Army Maintenance
Management System -- Aviation (TAMMS--A).
b. Interactive Electronic Technical Manual (IETM) -- TM 1--1520-- Longbow/Apache IETM, CD No.
1, version 3.1.2, data 19 Nov 1998, CD date 1 Dec 1998 or subsequent.
c. TM 1--1520--238--23 -- Aviation Unit and Intermediate Maintenance Manual for AH--64A Apache
Attack Helicopter, 16 May 1994.
d. TM 1--1520--238--23P, Aviation Unit and Intermediate Maintenance Repair Parts and Special
Tools List for AH--64A Apache Attack Helicopter, 27 March 1995.
e. TM 9--1090--208--1--1 -- Aviation Unit and Intermediate Maintenance Manual for Armament
Subsystem, Helicopter: M139; Gun, Automatic, 30 millimeter: M230; Rocket Management Subsystem,
Inventory--Deployment: M140.
f. TM 1--1500--328--23 -- Aeronautical Equipment Maintenance Management Policies and
Procedures, 30 July 1999.
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