1、 INCH-POUND MIL-DTL-82946A (OS) 27 August 2008 SUPERSEDING MIL-DTL-82946 (OS) 30 October 1998 DETAIL SPECIFICATION CARTRIDGE, AIRCRAFT FIRE EXTINGUISHER, CCU-121/A This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all Departm
2、ents and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the requirements for the manufacture and acceptance of the CCU-121/A Aircraft Fire Extinguisher Cartridge, which for the purpose of this specification, is referred to as “cartridge“. 2. APPLICABLE DOCUMENTS
3、 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure th
4、e completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specificat
5、ions, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those are those cited in the solicitation or contract. DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-D-21625 Design and Evaluation of Cartridges for Ca
6、rtridge Actuated Devices Comments, suggestions, or questions on this document should be addressed to DEPARTMENT OF THE NAVY, Indian Head Division, NSWC, Code E11G3, Document Control, 4072 North Jackson Road, Suite 106, Indian Head, MD 20640-5115 OFFICIAL BUSINESS, or emailed to amanda.pennnavy.mil.
7、Since contact information can change, you may want to verify the currency of this information using the ASSIST Online database at http:/assist.daps.dla.mil. AMSC N/A FSC 1377 DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproductio
8、n or networking permitted without license from IHS-,-,-MIL-DTL-82946A (OS) 2 MIL-DTL-23659 Initiators, Electric, General Design Specification for DEPARTMENT OF DEFENSE STANDARDS MIL-STD-810 Environmental Test Methods and Engineering Guidelines MIL-STD-1168 Ammunition Lot Numbering and Ammunition Dat
9、a Card (Copies of these documents are available online at http:/assist.daps.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2.2 Other Government documents, drawings, and publications. The following other Governmen
10、t documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation (see 6.2). DRAWINGS NAVAL AIR SYSTEMS COMMAND (CAGE Code 30003) DL 3205AS100 Cartridge, Aircraft Fire Extinguisher, CCU-121/
11、A 838AS185 Aircraft Fire Extinguisher Cartridge Test Fixture 3205AS101 CCU-121/A Vibration Test Fixture (Application for copies should be addressed to the Commanding Officer, Naval Aviation Supply Office, Cog I Support Branch (Code 03441), 5801 Tabor Avenue, Philadelphia, PA 19120-5099.) 2.3 Non-Gov
12、ernment publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DOD adopted are those listed in the issue of the DODISS cited in the solicitation. Unless otherwise specified, the issues of do
13、cuments not listed in the DODISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM E1742 Standard Practice for Radiographic Examination (Copies of these documents are available from ASTM International, 100 Barr Harbor Dr., P.O
14、. Box C700, West Conshohocken, PA 19428-2959 or online at http:/www.astm.org/.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-82946A (OS) 3 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflic
15、t between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a
16、 sample (see 6.3) shall be subjected to first article inspection in accordance with 4.3. A first article inspection shall be required if : a. There has been more than 24 months since production of the latest accepted lot, b. There has been a relocation of the production facility, c. There has been a
17、 major change in personnel or procedures, or, d. There has been a major change in the design. 3.2 Primary components. The ignition charge and the output charge are primary components. Only one lot of each primary component shall be used in a cartridge lot. One primary component lot may be used in mo
18、re than one cartridge lot. 3.3 Cartridge requirements. The entire lot of production cartridges shall be inspected as specified in Table I of section 4. Failure of any cartridge to meet the requirements of Table I shall result in rejection of the cartridge. 3.3.1 Visual inspection. Each cartridge sha
19、ll be free of visible defects when inspected against drawing 3205AS100 in accordance with 4.5.1. 3.3.2 Bridge circuit resistance. Each cartridge bridge circuit resistance shall be 1.00 0.1 ohms when measured in accordance with 4.5.2. 3.3.3 Radiographic inspection. Each cartridge shall be radiographi
20、cally inspected. The inspection shall verify proper assembly, presence of parts, sealing, and proper electrical connections when inspected in accordance with 4.5.3. 3.3.4 Leakage. Each cartridge shall pass a dry gas leak test. Cartridges that exhibit a leak rate in excess of 1.0 x 10-5cm3per second
21、at a differential of 1.0 0.1 atmospheres shall be considered defective. The leak test shall be conducted as specified in 4.5.4. 3.4 Cartridge sampling inspection. Cartridges from each first article test sample shall meet the applicable requirements of 3.3 and 3.4 as defined in Table II of section 4.
22、 Cartridges from each lot acceptance test sample, shall meet the applicable requirements of 3.3 and 3.4 as defined in Table III of section 4. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-82946A (OS) 4 3.4.1 No-Fire Current. The cartridge s
23、hall not fire or dud, when subjected to a direct current of one ampere at one watt of power for 5 minutes minimum when tested in accordance with 4.5.5. The cartridge shall meet the specification requirements when functioned in accordance with 4.5.12. 3.4.2 Static discharge. The static discharge shal
24、l not fire or dud the cartridge when tested in accordance with 4.5.6. The cartridge shall me meet the specification requirements when functioned in accordance with 4.5.12. 3.4.3 Stray voltage. Stray voltage shall not fire or dud the cartridge when tested in accordance with 4.5.7. The cartridge shall
25、 meet the specification requirements when functioned in accordance with 4.5.12. 3.4.4 Vibration. The cartridge shall not incur damage or deformation from the vibration test of 4.5.8. The cartridge shall me meet the specification requirements when functioned in accordance with 4.5.12. 3.4.5 Temperatu
26、re-Shock/Humidity and Altitude (TSHA). The cartridge shall not incur damage or deformation after exposure to the TSHA environments per MIL-D-21625, as specified in 4.5.9. The cartridge shall me meet the specification requirements when functioned in accordance with 4.5.12. 3.4.6 Shock. The cartridge
27、shall not incur damage or deformation from the shock test of 4.5.10. The cartridge shall me meet the specification requirements when functioned in accordance with 4.5.12. 3.4.7 Salt fog. The cartridge shall not incur deformations including corrosion, peeling, chipping, or blistering of the finish as
28、 a result of the salt fog test of 4.5.11. The cartridge shall me meet the specification requirements when functioned in accordance with 4.5.12. 3.4.8 Function. The cartridge, when tested in accordance with 4.5.12, shall produce a 0.015 inch minimum indent in the 6061-7651 Aluminum witness block when
29、 tested in accordance with 4.5.12. 3.4.8.1 Ignition time. The cartridge shall fire within 10 milliseconds (ms) of the application of 5.00 +0.25, -0.0 amps, when tested in accordance with 4.5.12.1. The ignition time shall be defined from the application of power until the loss of continuity in the br
30、idge circuit. 3.4.8.2 Misfire. There shall be no misfires. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-82946A (OS) 5 3.5 Workmanship. The cartridge shall be constructed and finished in a manner to assure compliance with all requirements o
31、f this specification. Particular attention shall be directed to dimensions, finishes, sealing, and assembly operations. 4. VERIFICATION 4.1 Classification of inspections. The inspection requirements specified herein are classified as follows: a. Production inspection (see 4.2) b. First article inspe
32、ction (see 4.3) c. Lot acceptance inspection (see 4.4) 4.2 Production. The entire lot of production cartridges manufactured under the contract shall be inspected and screened for defects as defined in Table I. Cartridges failing to meet the requirements of 3.3 defined in Table I shall be rejected an
33、d removed from the lot. 4.3 First article. Unless otherwise specified in the contract or purchase order (see 6.2), a first article sample of 33 cartridges shall be subjected to first article testing. Thirty of these cartridges shall be expended in the tests listed in Table II and three cartridges sh
34、all be retained for investigative purposes. Any damage inflicted by the environmental treatments, which would adversely affect the performance of the item in service application shall be cause for rejection of the first article sample. Any further production prior to notification by the contracting
35、agency of first article sample acceptability shall be at the contractors risk. The first article sample shall not be applied as part of the quantity specified for delivery by the contract. Failure of any cartridge to comply with the requirements of 3.3 and 3.4 defined in Table II shall be cause for
36、rejection of the first article represented. 4.4 Lot acceptance inspection. Lot acceptance shall consist of the examinations and tests specified in Table III. Failure of any cartridge to comply with the requirements of the visual, bridgewire circuit resistance, radiographic or leakage nondestructive
37、test (NDT) shall be cause for rejection of the cartridge represented. Any NDT failure will require that the production lot be subjected to 100% screening for the anomalous condition. 4.4.1 Sample size. A random sample from each production lot, including the retained sample for investigative purposes
38、, shall be selected in accordance with Table IV for lot acceptance inspection. 4.5 Inspection and tests. Tolerances shall be as specified in the appropriate specification unless specified in this document. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-
39、,-,-MIL-DTL-82946A (OS) 6 TABLE I. Production lot inspections. Test Sequence Test Paragraph Requirement Paragraph 1. Visual 4.5.1 3.3.1 2. Bridge circuit resistance 4.5.2 3.3.2 3. Radiographic 4.5.3 3.3.3 4. Leakage 4.5.4 3.3.4 TABLE II. First article test plan. Test Sequence Sample Group Test Parag
40、raph Requirement Paragraph I II III IV V VI 1. Visual 4.5.1 3.3.1 6 6 6 6 6 3 2. Bridge circuit resistance 4.5.2 3.3.2 6 6 6 6 6 3 3. Radiographic 4.5.3 3.3.3 6 6 6 6 6 3 4. Leakage 4.5.4 3.3.4 6 6 6 6 6 3 5. Power Current14.5.5 3.4.1 6 6. Static Discharge14.5.6 3.4.2 6 7. Stray Voltage14.5.7 3.4.3
41、6 8. Vibration24.5.8 3.4.4 6 9. TSHA14.5.9 3.4.5 6 10. Shock24.5.10 3.4.6 6 11. Salt fog14.5.11 3.4.7 6 12. Function test: -65F +70F +225F 4.5.12 3.4.8 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1A bridge circuit resistance test shall be conducted following specified test. 2A visual, bridge circuit resistance te
42、st, leakage, and radiographic inspection shall be conducted following the specified test. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-82946A (OS) 7 TABLE III. Lot acceptance inspections and tests. Inspection/Test Test Paragraph Requiremen
43、t Paragraph Quantity 1. Visual inspection 4.5.1 3.3.1 Test and Retain Sample 2. Bridgewire circuit resistance 4.5.2 3.3.2 Test and Retain Sample 3. Radiographic inspection 4.5.3 3.3.3 Test and Retain Sample 4. Leakage test 4.5.4 3.3.4 Test and Retain Sample 5. Function test: -65F 70F 225F 4.5.12 3.4
44、.8 1/3 Sample 1/3 Sample 1/3 Sample TABLE IV. Lot acceptance sampling. Lot Size Test Sample Size Retained Sample Size 2 thru 50 9 2 51 thru 90 15 2 91 thru 150 21 3 151 thru 280 33 3 281 thru 500 51 3 501 thru 1200 81 3 4.5.1 Visual inspection. Cartridges shall be free of the following defects: burr
45、s, dents, or other defects which may prevent entry of the cartridge into the firing chamber, or affect the resistance of the cartridge to moisture. All cartridge markings and identifications shall be correct and legible. Each cartridge shall meet the requirements of 3.3.1. 4.5.2 Bridge circuit resis
46、tance. The resistance of each cartridge, measured between pin “B“ and pin “F“, shall be measured with an accuracy of one percent using an apparatus which subjects the bridge circuit to a current of 5 milliamperes maximum. Each cartridge shall meet the requirements of 3.3.2. Provided by IHSNot for Re
47、saleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-82946A (OS) 8 4.5.3 Radiographic inspection. Each assembled cartridge (explosive cup, wiring harness and connector) shall be x-rayed in accordance with ASTM E1742. Any observable imperfections in assembly shall be cause
48、 for rejection. The item shall be positioned for the most revealing exposure. All items shall be identified with serial numbers prior to x-raying. The items for examination shall be arranged on trays or boards in consecutive numerical order by serial number and each radiographic plate shall carry a
49、permanent identification of the items displayed thereon. The radiographic plate identification shall include the NAVAIR drawing number, the complete lot number per MIL-STD-1168, contract number, and the span of serial numbers displayed. Radiographic plates of the entire assembled cartridge production lot shall accompany the ba
