Military Surplus Accessories OE-254_antenna_change_MWO11-5985-357-30-1_1991.pdf OE-254_antenna_change_MWO11-5985-357-30-1_1991.pdf
LIMITED URGENT
MWO effective date is 1 February 1991 and completion date
is 1 August 1991.
MWO 11-5985-357-30-1
MODIFICATION WORK ORDER
MODIFICATION OF
ANTENNA GROUP OE-254/GRC
(NSN 5985-01-063-1574)
Headquarters,
Department of the Army, Washington, DC
1 February 1991
REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS
You can help improve thiS MWO. If you find any
mistakes or if you know of a way to improve the
procedures please let us know. Mail your letter
or DA Form 2028 (Recommended Changes to Publications and Blank Forms) to: Commander, US Army
Communications-Electronics Command and Fort
Monmouth, ATTN: AMSEL-LC-LM-LT, Fort Monmouth,
New Jersey 07703-5000.
In either case, a reply
will be furnished direct to you.
1.
PURPOSE OF MODIFICATION.
The purpose of this modification is to extend the life expectancy of
existing OE-254/GRC antenna support sleeves, mast sections,
and mast
and base assembly.
Distribution authorized to the Department of Defense and
DOD contractors only for official use or for administrative
or operational purposes.
15 April l990. Other requests for this document will be
referred to Commander, US Army Communications-Electronics
Command and Fort Monmouth, ATTN: AMSEL-LC-LM-LT, Fort
Monmouth, NJ 07703-5000.
DESTRUCTION NOTICE
prevent disclosure of contents or reconstruction of the
document.
This determination was made on
- Destroy by any method that will
1
MWO ll-5985-357-30-1
2. PRIORITY.
This modification is classified as
Operational
Safety of
Use/Flight Message 201800Z MARCH 1990.
restrictions provided therein remain in
LIMITED URGENT as a
result of an
Operating
effect until this modification is
applied.
3. END
Nomenclature
Antenna Group
ITEM OR SYSTEM TO BE MODIFIED.
NSN
5985-01-063-1574
Part No.
OE-254/GRC
CAGE
Serial No.
80058 All
OE-254/GRC
4.
MODULES (COMPONENTS,
BE MODIFIED. The
following item, Whether installed or in depot stock,
ASSEMBLIES, SUBASSEMBLIES, BOARDS AND CARDS) TO
shall be modified.
Nomenclature NSN
Mast Assembly
5.
PARTS TO BE MODIFIED. The
depot
stock,
5985-01-124-5430
following items, whether installed or in
shall be modified. Stocked parts shall be modified prior to
Part No.
AB-1244A/GRC
Cage Quantity_
80058 1
issue and shall be marked so that it can be easily determined that
modification has been accomplished.
Nomenclature
Antenna Support
NSN
5985-01-072-8016
Part No.
SM-D-659286
CAGE
80063
Quantity
1
Sleeve (upper)
Antenna Support
5985-01-072-8015
SM-D-659279
80063 1
Sleeve (Iower)
Mast Section
(Lower)
Mast Section
(upper)
Mast and Base
Assembly
6.
APPLICATION.
a. Time compliance schedule.
1 February 1991 and its completion
5985-01-072-8065
5985-01-072-8066
5985-01-124-5431
SM-C-659276
SM-C-659283
A3002868
The efftive date of this MWO is
date is 1 August 1991.
80063 5
80063 5
80063 1
b. Level of maintenance. Direct Support is authorized to apply this
MWO.
2
Requirements
MWO 11-5985-357-30-1
Work Force/Skills
One
Direct Support
c.
Not
7.
MWO to be applied prior to or concurrently
Applicable.
TECHNICAL PUBLICATIONS
Level Repairer
AFFECTED/CHANGED AS A RESULT OF THIS MWO.
Man-hours
2.5
with this modification l
a. TM 11-5985-357-13, 1 February 1991.
b. TM 11-5985-357-23P, 15 June 1988.
8.
MWO KITS, PARTS, AND DISPOSITION.
a.
Kits/Parts
Contents of MWO
b.
c. Bulk and expendable
NSN
needed to apply the MWO.
kit. Not applicable.
materials.
NOMENCLATURE
7520-00-973-1059 Black Felt Tip Marker
Not applicable.
CAGE
PART NO.
81348 GG-M-00114 1
(or equivalent)
d. Parts Disposition
Not applicable.
QUANTITY
9. SPECIAL TOOLS;
(TMDE);AND FIXTURES REQUIRED
NSN
5180-00-605-0079
JIGS; TEST MEASUREMENT,
●
NOMENCLATURE
Tool Kit, Electronic 80058 TK100/G
AND DIAGNOS
CAGE
PART NO.
TIC EQUIPMENT
Quantity
1
Equipment TK-100/G
Pipe cutter
Lathe (optional)
1
1
10. MODIFICATION PROCEDURE.
a. Disassembly/
Assembly.
Refer to TM 11-5985-357-13 for
OE-254/GRC antenna disassembly/ assmebly instructions.
b. Inspection.
Inspect antenna support sleeves and mast sections
for stress cracks at the squared corners of the notch. Antenna support
sleeves and mast sections with stress cracks greater than 2.50 inches
or that are noticeably deformed or bent should be turned in for
disposition and replaced. Antenna Support sleeves and mast sections with
stress cracks that are less than 2.50 inches can modified.
3
MWO 11-5985-357-30-1
ANTENNA SUPPORT SLEEVE AND MAST SECTION
Procedures
11.
a. Antenna Support
Sleeves and Mast Sections.
CAUTION
Do not attempt to cut the antenna
support Sleeve and mast section tubes
with the pipe cutter.
NOTE
As an optional procedure, the antenna
support Sleeve and mast section tubes
can be cut with a lathe, if available.
Using a sharp pipe cutter, lightly score
(1)
a guide cut
line around each tube 2.50 inches from the notched end. Cut each
tube using a hack saw.
Ensure
that each cut is made perpendicular
to the antenna support sleeve and mast section to achieve a proper fit
with the mating section. After cutting,
remove burrs and sharp edge
with a file.
NOTE
Ensure that the cut end
support sleeve and mast
of each antenna
section is free
of any cracks.
(2) Inspect the tab on the
mast sections. Inspection will reveal
by
metal tabs
filing off the tabs with a
lower antenna support sleeve and
one of two types of tabs. Remove the
metal
file. The punched-out tabs
require hammering back of the tabs. Tap the tab using a ballpeen hammer
to just inside of the outer diamter of the lower antenna support sleeve
or mast section.
4
NOTE
Take care when hammering the tabs not to
punch them completely through, as this may
induce a stress area.
MWO 11-5985-357-30-1
Tabs or Drift (Roll) Pins
MAST AND
b. Mast and Base Assembly.
BASE ASSEMBLY
Inspect the mast and base assembly.
Inspection will reveal either the same types of tabs as described
for the lower antenna support sleeve and mast sections, or metal drift
pins. Remove the metal drift pins with a punch and hammer. Use the same
method of modification for those with tabs, as described for the lower
antenna antenna support sleeve and mast sections tabs.
c.
Replace broken or
unrepairable antenna support sleeves, mast
sections, or mast base with modified antenna support sleeves, mast
sections, or mast base.
11
●
CALIBRATION REQUIREMENTS. Not applicable.
12. WEIGHT AND BALANCE
DATA. Weight and balance are not significantly
affected.
13. QUALITY ASSURANCE REQUIREMENTS. Not applicable.
14. RECORDING AND REPORTING OF THE MODIFICATION.
a. Records and
report forms. Prepare in accordance with DA Pam 738-
750 as contained in Maintenance Management Update.
b.
Completion of DA Form 2407 or DA Form 5504, Maintainance Request.
After completing the DA Form 2407 or DA Form 5504, mail the NMP copy (copy
2) to: Commander,
Monmouth, ATTN: AMSEL-LC-LM-PP,
Mail the control copy (copy 3)to
ATTN: AMSDS-PM,
Activities). Forward the Organizational copy (copy 4) as
US Army Communications-Electronics Command and Fort
Fort Monmuth, New Jersey 07703-5000.
Commander, US Army Depot System Command,
Chambersburg, PA 17201, for PAC 98 (NonAIF Field
directed by
local commander.
c. Marking equipment
. Specific marking instructions for the
reidentification of modified items are:
(1) Antenna Group
O
E-254/GRC or Mast Assembly.
After a complete
antenna has been modified, mark the carrying case. Using a black felt tip
marker:
(a) Print the word
“MODIFIED” on the front cover of the
carring case in the space which is located below the manufacturer’s CAGE
nunber and above the serial number.
5
MWO 11-5985-357-30-1
(b) Mark an “X” across the entire yellow parts list label
(P/N SM-D-944782) on the inside cover of the carring case. (The part
numbers are now as listed in paragraph 14.d.)
(c) Mark an “X” across the ERECTION procedure paragraph and
Figure 3 on the yellow assembly and erection procedure label (P/N
SM-D-944780) on the inside cover of the carrying case. (The two person
erection procedure is deleted in TM 11-5985-357-13 dated 1 February 1991.)
(2) Antenna Support
available, or scratch the word “MODIFIED" in the CARC paint on the bottom
side of each tube.
(3) Mast and Base Assemblv.
scratch the word MODIFIED in the CARC painted part of the base.
d.
Identification data.
Nomenclature
Before
Mod.
After
Mod.
Before
Mod.
After
Mod.
Before
Mod.
Antenna Group
OE-254/GRC
Mast Assembly
Mast Assembly
Antenna Support
sleeve (Upper)
Sleeve or Mast Section. Rubber stamp, if
Rubber stamp, if available, or
CAGE and Part Number
80058 / OE-254/GRC
***NO CHANGES***
80058 / AB-1244A/GRC
80058 / AB-1244B/GRC
80063 / SM-D-659286
NSN
5985-01-063-1574
5985-01-124-5430
5985-01-324-3461
5985-01-072-8016
After
Mod.
Before
Mod.
After
Mod.
Before
Mod.
6
Antenna Support
sleeve (Upper)
Antenna Support
sleeve (Lower)
Antenna Support
Sleeve (Lower)
Mast Section
(Lower)
80063 / A3159902
80063 / SM-D-659279
80063 / A3159895
80063 / SM-C-659276
5985-01-326-5533
5985-01-072-8015
5985-01-327-1448
5985-01-0-8065
MWO 11-5985-357-30-1
After
Mod.
Before
Mod.
AFTER
Mod.
Before
Mod.
After
Mod.
Mast Section
(Lower)
Mast Section
(Upper)
Mast Section
(Upper)
Mast and Base
Assembly
Mast and Base
Assembly
80063 / A3159892
80063 / SM-659283
80063 / A3159899
80063 / A3002868
80063 / A3159890
5985-01-324-3462
5985-01-072-8066
5985-01-324-3463
5985-01-124-5431
5985-01-324-3464
15. MATERIEL CHANGE (MC) NUMBER. This MWO is authorized by MC No.
1-90-07-0017.
16. MODIFICATION IDENTIFICATION. This MWO consists of cutting 2.50
inches off the notched end of the antenna support sleeves and mast
sections; filing off the metal abs or hammering in the punched-out
tabs on the lower antenna support sleeve, mast sections, and mast and
base assembly; and punching out the metal drift pins on the mast and
base assembly that does not have metal tabs or punched-out tabs.
By Order of the Secretary of the Army:
CARL E. VUONO
General, United States Army
Chief of Staff
Official:
THOMAS F. SIKORA
Brigadier General, United States Army
The Adjutant General
DISTRIBUTION:
To be distributed in accordance with DA Form 12-51–E,
block 2504, Operator, Unit, and Direct Support/General
Support Maintenance requirements for MW0 11–5985–357–30-1.
7 / (8 blank)
PIN: 049646-000
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