1、AMSC N/A FSC 4220 MIL-DTL-81543C 14 July 2010 SUPERSEDING MIL-C-81543B (AS) 22 February 1980 DETAIL SPECIFICATION CONTAINER ASSEMBLIES, INFLATABLE LIFE RAFT This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification cov
2、ers the requirements for inflatable life raft and accessory container assemblies. 1.2 Classification. Inflatable life raft containers will be of the following types. Type I - Container Assembly, Life Raft, Helicopter Type II - Container Assembly, Outer, Standard Soft Pack Type III - Container Assemb
3、ly, Combination Life Raft and Equipment Container Type IV - Container Assembly, Rigid Seat Survival Kit or High Speed Soft Pack Type V - Container Assembly, Pararaft Kit for NB-7 Parachute Type VI - Accessory Container Assembly, LRU-12/A, LRU-13/A, and LRU-1/P Type VII - Accessory Container Assembly
4、, LRU-14/A Type VIII - Accessory Container Assembly, LRU-15/A (Mark 20) Type IX - Accessory Container Assembly, 20 Man Life Raft, for Wing Installation in KC-130F and C-130F Aircraft Type X - Container assembly, VEE Bottom Life Raft Helicopter Comments, suggestions, or questions on this document sho
5、uld be addressed to Defense Supply Center Philadelphia, ATTN: DSCP-NASA, 700 Robbins Avenue, Philadelphia, PA 19111-5096 or email to dscpg and shall extend from just being visible to a maximum of one inch beyond the applicable edge. The adhesive shall not be allowed to remain in clots or permitted t
6、o extend in such a manner as to result in localized stiffness. There shall be no spots or stains resulting from the cementing operation. The cemented areas shall not contain any trapped air, channels, edge lifts, or excessive wrinkling. 3.3.4 Seams and stitching. Unless otherwise specified, all the
7、seams and stitching used in the fabrication of the container assemblies shall conform to applicable drawing requirements; and shall be accomplished with stitch Type 301 conforming to ASTM D6193, with 6 to 8 stitches per inch. All the seam edges shall be properly forced out and shall not contain any
8、folds. No seam shall be twisted, puckered, or pleated, and no part of the container shall be caught in an unrelated operation or seam. All the thread ends shall be trimmed to a length of 1/4 to 3/8 inch. Each row of stitching shall be straight and parallel to the seam edge. The straightness of the s
9、titching, in any row, shall be maintained within a tolerance of 1/32 inch. The ends of the stitching that are not caught in other seams or stitching shall be securely backstitched, by overlapping on itself for at least 1/2 inch. Thread breaks, skips, and run-offs shall be overstitched not less than
10、one inch. The thread tension shall be maintained so that there shall not be any loose or overly tight stitching, and the lock shall be imbedded in the materials sewn together. There shall be no spots or stains resulting from the sewing operation. 3.3.4.1 Bartacking. Unless otherwise specified, the n
11、umber of stitches per bartack shall be based proportionally on 7/8 inch long bartack containing a minimum of 49 stitches. The length and location of each bartack shall be as specified in applicable drawings. 3.4 Color. The color of the containers and components shall be as specified in applicable dr
12、awings. 3.5 Markings. Markings shall be in accordance with MIL-STD-130. Ink, color, size, and location of markings shall be as specified in applicable drawings. Letters and numerals 1/4 inch or less in height shall not be stenciled. Serial number for containers shall be in accordance with 3.5.1. All
13、 markings shall be thoroughly dry prior to packing or packaging. Markings may be applied directly to the specified area or to a patch securely adhered to the specified area. Material and color of the patch, if used, shall be the same as the container material to which applied. 3.5.1 Serial numbers.
14、Unless otherwise specified, each container shall be identified by a serial number which shall be assigned by the manufacturer. Serialization shall be by a block of consecutive number to cover the entire acquisition quantity. 3.6 Dimensions. When measured as specified in 4.4.2, the dimensions of the
15、containers shall conform to applicable drawing requirements. 3.7 Workmanship. After completion of the final assembly, the containers shall be thoroughly cleaned and all loose thread, lint, and foreign matter shall be removed. The grommets and snap fasteners shall be clinched without distortion, dama
16、ge, splitting, or cutting of the cloth, webbing or tape as applicable. The metal components shall not be misaligned nor contain any sharp edge, crack, dent, nick, burr, or sliver. The containers shall not contain any nonspecified hole, abraded area, tear, cut, mend, needle chew, spot, or stain. The
17、container assemblies shall conform to the quality and grade of product established by this specification. The occurrence of defects shall not exceed the acceptance criteria established herein. 4. VERIFICATION Provided by IHSNot for ResaleNo reproduction or networking permitted without license from I
18、HS-,-,-MILDTL81543C 5 4.1 Classification of inspection. The examination and testing of the life raft container assemblies shall be classified as follows: (a) First article inspection. First article inspection consists of examinations and tests performed on samples which are representative of the pro
19、duction item after award of a contract to determine that the production item conforms to the requirement of this specification (see 3.1, 4.2, 4.2.1, and 4.2.1.1). (b) Conformance inspection. Conformance inspection consists of examinations and tests performed on individual products or lots to determi
20、ne conformance of the products or lots with the requirements set forth in this specification (see 4.3 through 4.3.1.2). 4.2 First article inspection. The first article inspection of the inflatable life raft container assemblies shall consist of all the examinations and tests of this specification. 4
21、.2.1 First article samples. Unless otherwise specified, as soon as practicable after the award of the contract or order, the manufacturer shall submit two container assemblies of the type specified in the contract or order. The samples shall be representative of the construction, workmanship, compon
22、ents, and materials to be used during production. When a contractor is in continuous production of the type container specified, from contract to contract, submission of additional first article samples on the new contract may be waived at the discretion of the procuring activity (see 6.2). Approval
23、 of the first article inspection samples or the waiving of the first article inspection does not preclude the requirements for performing the conformance inspection. The first article inspection samples shall be furnished to the Government as directed by the contracting officer (see 6.2). 4.2.1.1 Fi
24、rst article sample disposition. Upon completion of the first article inspection, recommendations and comments pertinent for use in monitoring production will be forwarded by the Government activity responsible for the inspection program (see 6.2) to the contracting officer. One of the approved first
25、 article samples will be returned to the manufacturer for reference in monitoring production. The other sample will be consumed or destroyed in the inspection program, and shall not be considered as a part of the quantity to be delivered under the contract. 4.3 Conformance inspection. The sampling a
26、nd inspection levels shall conform to ASQ Z1.4. The conformance inspection shall consist of the following: Visual examination Dimensions 4.3.1 Sampling. 4.3.1.1 Inspection lot. 4.3.1.1.1 Container assembly. An inspection lot size shall be expressed in units of one container assembly of one type made
27、 essentially under the same conditions and from the same materials and components. The sample unit shall be one container assembly of one specific type. 4.3.1.1.2 Adhesive. An inspection lot size shall be expressed in units of one batch of adhesive. An inspection lot shall consist of all the batches
28、 of the adhesive used by the manufacturer during one days production of the container assemblies (see 3.3.2). The sample unit shall be one batch of the adhesive used during one days production of the container assemblies. 4.3.1.2 Sampling for examinations and tests of the container assemblies. The s
29、ample size, examinations, and tests required for the container assemblies shall be specified in Table I. However, the Acceptance Quality Limit (AQL) shall be as specified in the contract. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MILDTL81543C 6
30、 TABLE I. Sample size, examinations, and tests of the container assemblies. Inspection Paragraph Sample size Requirement Method Visual examination 3.2 through 3.5.1, and 3.7, and applicable drawings 4.4.1.1 A. Every container for major defects B. Inspection level II for minor defects 1/ Dimensional
31、check 3.6 and applicable drawings 4.4.1.1 and 4.4.2 Inspection Level S-3 1/ 1/ The sample size shall be based on the applicable sample size code letter corresponding to the specified inspection level of ASQ Z1.4. 4.4 Inspection methods. 4.4.1 Visual examination. 4.4.1.1 Container assemblies. Each co
32、ntainer assembly of one type, selected as a sample unit from the lot, shall be examined visually to determine conformance to this specification. The classification and list of defects, Table II shall be used to classify and enumerate the defects found. Provided by IHSNot for ResaleNo reproduction or
33、 networking permitted without license from IHS-,-,-MILDTL81543C 7 TABLE II. Classification of defects for the visual examination of the containers Defects MajorMinor General a. Any weakening defect such as smash, multiple float, loose slub needle chew or abraded area: (1) Seriously affecting service
34、ability or appearance (2) Not seriously affecting serviceability or appearance X X b. Color of any component not as specified or contains one or more shade bars X c. Any thread end not trimmed to a length of 1/4 to 3/8 inch or loose threads ends X d. Any spot or stain: (1) Seriously affecting servic
35、eability or appearance (2) Not seriously affecting serviceability or appearance X X e. Any edge of the uncoated nylon fibrous materials not seared or contains sharp edges X f. Any non-specified hole, cut, tear, mend or burn X Metallic components a. Any surface rough, misaligned, or contains any crac
36、k, nick, burr, sharp edge, dent, or sliver X b. Any surface unclean or contains embedded foreign matter X c. Any loose, detached, or otherwise not securely retained X d. Any malformed, corroded, fractured, broken, chipped, bent, or distorted X Provided by IHSNot for ResaleNo reproduction or networki
37、ng permitted without license from IHS-,-,-MILDTL81543C 8 TABLE II (Continued) Defects Major Minor e. Any improperly finished: (1) Affecting serviceability or appearance (2) Not affecting serviceability or appearance X X f. Any snap fastener or grommet misplaced or improperly clinched resulting in cu
38、tting of the cloth, tape, or webbing, as applicable X g. Any snap fastener mismated or failing to function properly when snapped closed and unsnapping each of the snap fastener at least three times X h. Any part of the slide fastener assembly bent, broken, or the movement of the slider interfered wi
39、th when checked for proper function by opening and closing the slide fastener at least three times, along its entire length Components and assembly X a. Any component not as specified or any defect of a component or defect of assembly not herein classified: (1) Affecting serviceability or appearance
40、 (2) Not affecting serviceability or appearance X X b. Any component, component part, or required operation omitted or any operation improperly performed not herein classified: (1) Affecting serviceability or appearance (2) Not affecting serviceability or appearance X X Provided by IHSNot for Resale
41、No reproduction or networking permitted without license from IHS-,-,-MILDTL81543C 9 TABLE II (Continued) Defects Major Minor Seams and stitching a. Accuracy of seaming: (1) Any seam, hem, or attachment of any component twisted, puckered, pleated, or caught in an unrelated operation or stitching; any
42、 seam edge not properly forced out or contains any fold (2) Ends of stitching that are not caught in other seams or stitching: (a) Not securely backstitched (b) Secure but backstitched for a distance less than 1/2 inch or the backstitching is not overlapped on itself (3) Thread breaks: (a) Not secur
43、ely overstitched (b) Secure but overstitched for a distance less than one inch X X X X X b. Gage of stitching: (1) Any stitching irregular, unevenly gaged, or various stitching not uniform, when observed on major portion of the seam X c. Open seams 1/: (1) 1/2 inch or less (2) More than 1/2 inch X X
44、 d. Raw edges 2/: (1) More than 1/4 inch but not more than one inch (2) More than one inch X X e. Seam and stitch type: (1) Not specified seam or stitch type X Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MILDTL81543C 10 TABLE II (Continued) Defec
45、ts Major Minor f. Stitch tension 3/: (1) Loose tension, resulting in a loose seam or tight tension resulting in breaking of stitches, when normal pull is applied X g. Stitches per inch (only when condition exists on the major portion of the seam): (1) Stitches more or less than specified: (a) One or
46、 two stitches (b) More than two stitches X X Cementing operations a. Any cementing operation not in accordance with requirements: (1) Seriously affecting serviceability or appearance (2) Not seriously affecting serviceability or appearance. X X b. Any void or channel in any cementing operation: (1)
47、Seriously affecting serviceability or appearance (2) Not seriously affecting serviceability or appearance X X c. Excessive wrinkling in any cementing operation X Markings a. Missing, incomplete, incorrect, illegible, or improperly located b. Ink not adhere to surface or easily flakes off X X 1/ A se
48、am shall be classified as open, when one or more stitches joining a seam are broken or when two or more continuous skipped stitches or run-offs occur. On double stitched seams, a seam is considered open, when either one or both sides of the seam is open. 2/ Any edge that should be turned under and i
49、s not, but is securely caught in the stitching, shall be classified as a raw edge. Any raw edge not securely caught in the stitching shall be classified as an open seam. 3/ Puckering is evidence of tight tension or gathering of the material. When puckering is evident, other than the gathering of the material, the seam or hem, as applicable shall be tested by exerting normal pull in the lengthwise directi
