1、MIL-A=45940(WC) 7 December 71 SUPERSEDING (See Section 6) MILITARY SPECIFICATION ARMAMENT SUBSYSTEM, HELICOPPER, 7.62MM MCHINE GUN: DOOR MWTED, LIGm WEIGW, M24 (Less M6OD Machine Gun) 1. SCOPE 1.1 This specification covers one type light weight armament sub- system providing two pintle mounted 7.62m
2、m, 60 machineguns for right hand door and left hand escape hatch installation on CH-47 type helicopters. 2, APPLICABLF: Doms 2.1 The following documents, of the issue in effect on date of invitation for bids or request for proposal, form a part of the specifi- cation to the extent specified herein.
3、SPECIFICATIONS Military MIL-P-116 - Preservation, Methods of. MIL-I-6866 - Inspection, Penetrant Method of. MILI- 6868 - Inspection Process, Magnetic Particle. MIL-w-8611 - Welding, Metal Arc and Gas, Steel and Corrosion and Heat Resistant Alloys; Process for. MIL-W-12332 - Welding, Resistance, Spot
4、, Seam and Projection; For Fabricating Assemblies of Law-Carbon Steel. MIL-W-i3855 - Weapons, Small Arms and Aircraft Armament Subsystems, General Specification for. MIL-1-45607 - Inspection Equipment, Acquisition, Main- tenance and Disposition of. VHIS DOCUMENT CONTAINS 5 PAGES. FSC i005 P Licensed
5、 by Information Handling ServicesMilitary MIL-STD-105 - Sampling Procedures and Tables for 3n- spection by Attributes. MIL-STD-109 - Quality Assurance Terms and Definitions. MIL-STD-1261 - Welding Procedures and Constructional Steels . DRAWINGS U.S. Army Weapons Command A11699676 - Armament Subsyste
6、m, Helicopter, 7.6211n Machine Gun, Door Mounted, Light Weight, E124 9 ELilOz3X68 - Index of Inspection Equipment Lists, (Product drawings referenced in this specification are specified on Drawing A11699676 and related assembly drawings j . acceptance inspection equipment drawings form a part of Dra
7、wing IEZIl&$.) PUBLICATIONS U.S. Army Weapons Command Pl3427091 - Packaging Data Sheet for Armament Subsystem, Helicopter : M24 . (Copies of specifications, standards, drawl ngs, and publications required by suppliers in connect5on with specific procurement finctions should be obtained from the proc
8、uring activity or as directed by the contracting officer . ) 3. mmms 3.1 First article. Requirement for submission of the first article shall be as specified in the contract (see.6.1). Unless otherwise specified (see Gel)# the first article shall include the pilot pack (see 5.1). 3.2 Ikterials, cons
9、truction and design. The armament subsystem and parts shall conform to the naaterials, construction and design require- . ments specified herein, on Drawing Ai1699676 and drawings applicable thereto, and shall be in accordance with the applicable materials, construction and design provisions OZ NtL-
10、W-13855. 2 Licensed by Information Handling Services3.2.1 Welding. 3.2.1.1 Certification of welding. Unless otherwise specified (see 6.1), prior to production of any weldments, the contractor or manufacturer shall have Government approval of welding procedures and test specimens. ance with the appli
11、cable drawing and as specified herein. Welding of parts and subassemblies shall be in accord- 3.2.1.2 Welded joints. All welded joints of parts and subassemblies shall be sound and free of cracks, particle inspected in accordance with MIL-1-6868 and penetrant inspected in accordance with MIL-1-6866
12、as applicable. Welded joints shall be magnetic 3.2,s Gun mount assembly, 3.2.2.1 Gun mount. The right and left hand gun mounts shall be capable of assembly for the right and left side door mounting respectively and be securely attached to the door mount, by the quick release pin. Welding of the gun
13、mount assenfbly shall be in accordance with MIL-w-8611. 3.2.2.2 Pintle. The pintle shall assemble in the pintle post and be retained in-intle post by ball bearings. throughout its full range of travel without binding, retainer set screw shall be securely staked in place. The pintle shall rotate The
14、ball bearing 3.2.2.3 Quick release pin. The quick release pin shall readily The quick assemble to and disassemble fromthe mount bracket, and when assembled shall be retained in the mount bracket by the ball detent. release pin shall be attached to the mount bracket by the cable (see 3.2.7). 3.2.3 Am
15、unition box. The ammunition box shall readily asseuible to and disassemble fromthe weapon and be retained on the weapon by the weapon bracket assembly. The ammunition retaining rod shall move freely throughout its nil1 range of travel and held securely in position by the spring clip. The ejector plu
16、nger shall move freely throughout its full range of travel and be returned to its original position by spring action. Welding of the ammunition box shall be in accordance with MIL-STD-1261, and shall withstand the weld peel test in accordance with MIL-W-12332. 3 Y Licensed by Information Handling Se
17、rvicesflIL-A-qS790 LO 7977706 0307457 T 9 I 3.2.4 Empty cartridge bag. The empty cartridge bag shall be capable of being retained and removed fromthe cartridge bag frame assembly . frame assembly shall be capable of being attached to and removed from the weapon. without binding, and when released sh
18、all return to its original position by spring action. ance with ms-1261. 3.2.5 Empty cartridge bag frame assenibly. The empty cartridge bag The latch shall move freely through its full range of travel Welding of the cartridge bag frame shall be in accord- 3.2.6 Elastic cord assembly. The elastic cor
19、d assembly shall be securely retained on the mount bracket. a gradual applied stretch load of 75 pounds k 5 pounds without daniage or permanent stretch, 3.2.7 Cable assembly. The crimped sleeves on the cable shall be capable of withstanding the tensile load of 50 pounds without evidence of the cable
20、 pulling out of the sleeve. The elastic cord shall withstand 3.2.8 Endurance. The armament subsystem shall have a 90s probability of firing 10,000 rounds, and withstanding 100 cycles of rough handling without malfunctions, unserviceable parts or cracking of welded joints with a lo$ confidence level.
21、 Testing shall be as specified in 4.4.3.2 and 4.6.1. A malfunction is defined as one which a failure of the mount as a component of the munt precludes further firing without replacement of the munt or component of the mount. sembled to both right hand mount and left hand mount shall meet the target
22、requirements defined in Figures la, lb, 2a and 2b (see 4.4.2.2.5). 3.2.9 Targeting. The armament subsystem with M60D machinegun as- 3.3 Marking. Each armment subsystem shall be clearly marked in 3.4 Workmanship. Workmanship shall be in accordance with the accordance with the applicable drawings and
23、MLAI-13855. workmanship requirements of MfL-11-13855 . 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in Except as the contract or purchase order, the supplier is responsible for the per- formance of all inspection requirements as specified herein, othe
24、rwise specifled in the contract or order, the supplier may use his own or any other facilities suitable for the performnce of the inspection requirements specifled herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set foith in the speci
25、fication where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. c 4 Licensed by Information Handling ServicesMIL-A-45740 LO M 77779Ob 0309460 b MIL-A- 45940(WC) 4.2 Quality assurance terms and definitions, Quality assurance terms and definitio
26、ns used herein are in accordance with MIL-STD-109. 4.3 First article inspectfon. First article shall be sezected from early produc-tion and submitt-ed for insmction in accordance with the contract requirements (see 6.1). The first article shall be representative of production processes to be used du
27、ring quantity production, ination and test specified herein and such other examination and test as are necessary to determine compliance with the requirements of the contract e The first article shall be subjected to all exam- 4.4 &uaiity conformance inspection. 4.4.1 Inspection lot. The formation,
28、size and presentation of inspection lots of armament subsystems, parts aad packaging shall be in accordance with MIL-STD-105. prackicable in consideration of quality history, manufacturing conditions, and contractors delivery schedule, and within the limitations of MIL- W-13855. parts that have met
29、all inspection requirements specified herein. Inspection lots shall be as large as Armment subsystems shall be assembled Prom lots of component 4.4.2 Examinetion. 4,4.2.1 Component parts and concurrent repair parts. Examination of component parts and concurrent repair parts shall be performed in acc
30、ordance with the criteria specified in the contract (see 6.1). The contractors examination of these parts shall be accomplished prior to their assenbly into the end item or submission for acceptance as repair parts , shall be performed after completion of all testing and just prior to pre- servation
31、 and packaging, Unless otherwise specified herein, each amment subsystem shall be examined as specified below. ination shall include a visual examination for proper cleaning and presence of the -specified protective coating and to determine the general quality, completeness of manufacture, assenibly
32、, clarity and legibility of markings and workmanship* Armament subsystems failing to meet the requirements shall be rejected. 4.4.2.2 Armament subsystem, Final examination of armament subsystem Each step in the exam- 4.4.2.2.1 Gun mount asembly. a, &nually examine the gun mount pintle to assure that
33、 it is retained in the bearing by the ball bearings and that it can be manually rotated throughout its full range of travel with- out binding. Visually examine to assure the ball bearing retaining set screw is securely staked in place, b, 5 Licensed by Information Handling ServicesC. d. e. f. Manual
34、ly examine the quick release pin to assure that it readily assettiles to and disassembles fromthe mount bracket and when assembled, is retained in the mount bracket by the ball detents. Visually and manually examine to assure that the quick release pin is securely attached to the mount bracket by th
35、e cable (see Fi1699655 and Fl.1699658). Visually and manually examine the elastic cord assenibly to assure that it is securely retained on the mount bracket and that it has the full range of swing (see Fi1699655 and F11699658) Visually and manually examine all welded Joints to assure secure or missi
36、ng welds. 6 4.4.2 . 2.2 -nition boxe8 . a. Vtsually and manually examine the retaining rod to assure tat it moves freely throughout its fun range of travel and that it is held securely by the spring clip. Visually and manually examine the plunger to assure that it slides freely throughout its full r
37、ange of travel and when released is returned to its original position by spring action. c, Visually and manually examine all riveted joints to assure secure riveting and that there is no relative movement of the riveted parts. Visually and manually examine all welded joints to assure secure or missi
38、ng welds. b. d. 4.4.2.2.3 Empty cartridge bag. a. Visually and manually examine the empty cartridge bag to assure that the latch moves freely throughout its full range of travel and when released is returned to its original position by spring action, b. Visually and mnually examne all welded joints
39、of the cartridge bag frame assembly to assure secure or missing welds. Licensed by Information Handling ServicesMIL-A-45740 10 W 7777706 0307qb2 T MIL-A-& 5940 (WC ) 4.4 . 2 . 2.4 Armament subsystem assenibly . a. b. Visually and manually examine all welded joints to assure secure or missing welds.
40、&amine assembleability of the machinegun to the gun mount pintle assembly using approved inspection equipment that simulates the maximum mounting conditions of the M60D ma chinegun. Using a Government standard M60D machinegun, and equipment as depicted on Figures la, lb, 2a and 2b, examine to assure
41、 that the elevating and traversing limits of the armament subsystem are within the requirements indicated on Figures la, lb, 2a and 2b as applicable for right and left hand mount assemblies, Control of components shall be exercised to meet these limits. Failure to meet these limits shall be cause fo
42、r rejection and the corrective action taken in accordance with 4.4.3.1. C. 4.4.2.3 Packaging. Examination of packaging of armament subsystems shall be performed in accordance with the classification of defects and acceptable quality levels (Ams) specified in 4.4.2.3.1. shall be in accordance with mL
43、-STD-105, using inspection level I, The following provisions shall apply: Sample size a. b. c. The AQLs are specified as percent defective. The AQL l-isted for each defect shall be applied to the individual defect2 not to a group of defects. Examination for packaging defects specified in 4.4.2.3.1 s
44、hall apply to eachitem of the applicable sample of armament subsystems, interior packages, or exterior containers, as applicable. 4,4.2.3.1 Classification of defects for packaging. (Unless othen wise specified in each listed defect, the packaging requirements are specified on Packaging Data Sheet P8
45、427091). Categories Critical: None defined, Defect kjor: 101 Illegible or incorrect marking, 1.0 102 Improper location of marking, 1.0 103 Improper level of packaging or packing (see 1. o procurement documents), Improper closure of unit package, 164 Inadequate cleaning and dzying. 1.5 105 Improper p
46、reservation application, 1.5 1.5 i06 Minor : None defined. _ 7 Licensed by Information Handling ServicesMIL-A-q57qO LO W 777970h 0307Llb3 L W _ - - - KCEA-45940(WC) 4.4.2.4 Armament subsystem which have passed ali examinations after successful completion of testing shall be stamped with the Departme
47、nt of Defense complete inspection approval stamp on each of the base assemblies next to the pintle post assembly holes. The Government representative will control the stamps used for such stampings and observe the stamping operations as required to assure successful completion of all required examin
48、ation and tests. 4.4.3 Testing. 4.4.3 . 1 Failure data. ULL6ss otherwise specified herein, all tests shall be conducted on a complete armament subsystem inclusive of Govern- ment Furnished Property. If test requirements cited herein are not met, acceptance of the subsystem shalbe deferred and the co
49、ntractor shall accomplish as applicable, the following actions: a. Conduct 8 failure analysis study performing a dimensional physical and visual examination of the components which are Suspected to be the cause of failure or malfunction. b. Evaluate and correct the applicable production processes and procedures to prevent recurrence of the same defect(s) in future production. c. Examine subsystem, partially assembled subsystems .an components (including CO onents and subassemblies at in- process or final assembly 7 to insure that material containing the
