1、INCH-POUNDMIL-DTL-5578D 8 August 2008 SUPERSEDING MIL-T-5578C 31 July 1963 DETAIL SPECIFICATION TANKS, FUEL, AIRCRAFT, SELF-SEALING This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers self-sealing and part
2、ially self-sealing fuel tanks for use on aircraft. A tank consists of a cell or group of cells interconnected and the components attached directly thereto, to form a complete tank or reservoir. 1.2 Classification. The tanks are of the following general types, classes, styles and protection levels to
3、 be furnished as specified by the procuring activity (see 6.2): Type I - For use with engine fuel conforming to ASTM-D910 (intended for use with reciprocating engines). Type II - For use with engine fuel conforming to ASTM-D910, MIL-DTL-5624 or MIL-DTL-83133 (intended for use with jet engines). Clas
4、s A - Flexible cell construction. Class B - Semi-rigid or self-supporting cell construction. Style 1 - Non-pressurized fuel system. Style 2 - Pressurized fuel system. . Comments, suggestions, or questions on this document should be addressed to: Commander, Naval Air Warfare Center Aircraft Division,
5、 Code 4L8000B120-3, Highway 547, Lakehurst, NJ 08733-5100 or emailed to michael.sikoranavy.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at http:/assist.daps.dla.mil/. AMSC N/A FSC 1560 Provided by IHSNot f
6、or ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-5578D 2 Protection level (A) - Cell is completely self-sealing against .50 caliber (cal) and 20 millimeter (mm) ordnance. Protection level (B) - Cell is completely self-sealing against 14.5 mm armor piercing (AP) a
7、nd 23 mm AP. Protection level (C) - Part of cell is bladder construction and part is self-sealing against .50 cal and 20 mm ordnance. Protection level (D) - Part of cell is bladder construction and part is self-sealing against 14.5 mm AP and 23 mm AP. For cells of protection levels (C) and (D), the
8、portions of the cells to be self-sealing and non-self-sealing are as specified by the procuring activity. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents in other sections of th
9、is specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements documents cited in sections 3 and 4 of this specification, whether or not t
10、hey are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications and standards form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract.
11、 FEDERAL STANDARDS FED-STD-191 - Textile Test Methods FED-STD-601 - Rubber, Sampling and Testing FED-STD-791 - Lubricants, Liquid Fuels, and Related Products, Methods of Testing Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-5578D 3 DEPARTME
12、NT OF DEFENSE SPECIFICATIONS MIL-F-5577 - Fitting, Tank, Powerplant Fluid, Removable, General Specification for. (Inactive for New Design) MIL-DTL-5624 - Turbine Fuel, Aviation, Grades JP-4 and JP-5 MIL-DTL-6396 - Tanks, Aircraft Propulsion Fluid System, Internal, Removable, Non-Self-Sealing MIL-DTL
13、-83133 - Turbine Fuels, Aviation, Kerosene Types, NATO F-34 (JP-8), NATO F-35 and JP-8 + 100 MIL-DTL-85470 - Inhibitor, Icing, Fuel System, High Flash NATO Code S-1745 DEPARTMENT OF DEFENSE STANDARDS MIL-STD-129 - Military Marking for Shipment and Storage MIL-STD-801 - Inspection and Acceptance Stan
14、dards for Fuel Cells and Fittings (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.) 2.3 Non-Government publications. The following documents form a
15、part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. AEROSPACE INDUSTRIES ASSOCIATION NASM20470 - Rivet, Solid, Universal Head, Aluminum Alloy and Titanium Columbium Alloy. (DoD adopted) (Appl
16、ication for copies should be addressed to the Aerospace Industries Association, 1000 Wilson Boulevard, Suite 1700, Arlington, VA 22209-3901 or http:/aia-aerospace.org/pubs.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-5578D 4 ASTM INTERNA
17、TIONAL ASTM-D381 - Fuels by Jet Evaporation, Gum Content In. (DoD adopted) ASTM-D412 - Rubber, Vulcanized and Thermoplastic Elastomers - Tension. (DoD adopted) ASTM-D413 - Rubber Property - Adhesion to Flexible Substrate. (DoD adopted) ASTM-D471 - Rubber Property - Effect of Liquids. (DoD adopted) A
18、STM-D910 - Gasolines, Aviation. (DoD adopted) (Application for copies should be addressed to ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19248-2959 or http:/www.astm.org.) SAE INTERNATIONAL SAE-AS8879 - Screw Threads - UNJ Profile, Inch Controlled Radius Root with Increased Mino
19、r Diameter. (DoD adopted) (Application for copies should be addressed to SAE International, 400 Commonwealth Drive, Warrendale, PA 15096 or http:/www.sae.org.) 2.4. Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this doc
20、ument takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Non-self-sealing tanks. All fuel tanks qualified to this specification shall meet the requirements of MIL-DTL-6396, Type II or Type
21、 III. 3.2 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.2. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-5578D 5 3.3 Materials. The materials used in the manufacture of
22、 self-sealing fuel cells shall conform to applicable Government specifications. The use of magnesium is prohibited. 3.4 Design. The self-sealing fuel cells shall be designed for use with fuels conforming to ASTM-D910, MIL-DTL-5624, MIL-DTL-83133, or all three and shall be designed in conjunction wit
23、h the containing structure to avoid concentration of loads on splices, seams, fittings, or locations of concentrated flexure. The assembly consisting of the cell(s) and aircraft structure on which it is mounted shall be strong enough to handle the stresses caused by the following: a. Flexing resulti
24、ng from vibration b. Impact loads incident to takeoff, taxiing, and landing (including catapulting and aresting) c. Hydraulic surge of fuel incident to all dynamic conditions of flight d. Hydraulic surge of fuel incident to gunfire e. Pressure from hydrostatic head of fuel during level flight or man
25、euvers f. Pressure from neutral gases, if any, used to pressurize fuel cells 3.4.1 Dimensions. The dimensions and dimensional tolerances shall be developed by the contractor or Government procuring activity. The dimensional tolerance specified shall be such that the capacity of the production tanks
26、is within 1.5 percent of the designed total capacity. 3.4.2 Capacity. The head-versus-volume curve on production tanks shall conform within 1.5 percent to the average head-versus-volume curve prepared in accordance with 4.3.2.1. 3.5 Construction. The following requirements apply to fuel cell constru
27、ction intended for protection levels (A) and (B) and for the self-sealing portions of fuel cell construction intended for protection levels (C) and (D) (see 4.2.1.1). The non-self-sealing portions of construction shall conform to MIL-DTL-6396, Type II, Class B. 3.5.1 Inner-layer ply. The constructio
28、n shall be such that it will be impossible to transmit fuel to the sealant. If necessary to meet this requirement, a special barrier shall be utilized. The inner-layer ply shall be free of foreign matter, and the thickness shall agree with the approved construction within the established manufacturi
29、ng tolerances as described in the manufacturers specifications. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-5578D 6 3.5.2 Fabric ply. Fuel cells shall be so fabricated that the seam on any fabric ply shall not be superimposed with paralle
30、l seams of any adjacent fabric ply. 3.5.3 Sealant. The fuel cells shall use an approved sealant processed to meet the requirements of this specification. The sealant shall be free of foreign matter, and the thickness shall agree with the approved construction within the established manufacturing tol
31、erance as described in the manufacturers specifications. 3.5.4 Fittings. All fittings used in self-sealing fuel cells shall conform to MIL-F-5577. All flanges of the fitting shall be bonded to the cell. Every effort shall be made to utilize fittings in a single plane. Where the aircraft design neces
32、sitates the use of double plane fittings, particular care shall be taken to provide adequate exterior flange area to ensure satisfactory adhesive strength under all conditions of operation. The use of through bolts is prohibited. 3.5.4.1 Screw threads. Screw threads shall be in accordance with SAE-A
33、S8879. The use of pipe threads is prohibited. 3.6 Performance. The cells and tanks or specified parts thereof shall meet the requirements specified herein when subjected to the following tests, as specified in Section 4: a. Inspection (4.5.1) b. Stand (4.5.2) c. Dissection (4.5.3) d. Inner-layer Ply
34、 (4.5.4) e. Test cubes (cells) (4.5.5) f. Installation (4.5.6) g. Capacity (4.5.7) h. Pressure (4.5.8) i. Slosh or Slosh and Vibration Resistance (4.5.9) j. Dissection after slosh (4.5.13) k. Accelerated Load Resistance (4.5.14) l. Gunfire resistance on tank installation (4.5.15) 3.6.1 Operating tem
35、perature. The self-sealing fuel cell shall operate throughout the temperature range of -40 to 160 F (-40 to 71 C) insofar as self-sealing performance is concerned. For all other operating conditions, the cell shall operate throughout the temperature range of -65 to 160 F (-54 to 71 C) or as directed
36、 by the procuring activity. 3.7 Weight. The weight of production cells shall be within 5 percent of the average weight of the first 10 production cells. 3.8 Finish. Finishes shall meet the requirements of MIL-DTL-6396, Type II or Type III. Provided by IHSNot for ResaleNo reproduction or networking p
37、ermitted without license from IHS-,-,-MIL-DTL-5578D 7 3.9 Age. Cells shall be not greater than 2 years old from date of initial cure to delivery to the procuring activity. 3.10 Marking. Each assembly part shall be marked with a part number that is the same as the drawing number of that part or assem
38、bly. (An assembly consists of parts that are permanently fastened together.) Exceptions to this marking requirement are those parts that do not have enough surface area for a part number. 3.11 Identification of product. Equipment assemblies and parts shall be marked as follows: a. Reorder by part nu
39、mber (insert current aircraft contractor part number) b. Federal stock number c. Aircraft model(s) and cell location d. Cure date (month and year) e. Construction numbers f. Cell manufacturer and CAGE code g. Cell manufacturer part number h. Weight, empty (actual) i. MIL-DTL-5578D, Type, Class, Styl
40、e, Protection Level (if applicable) j. Contract or order number The nameplate shall be located on the cell in such a position that when the tank is installed in the aircraft, the nameplate shall be readily accessible and visible after removal of aircraft access panels, deck doors, etc. 3.12 Marking
41、of shipments. Each shipping container shall be marked to indicate presence of preservation and method of packing. The container shall be marked in accordance with MIL-STD-129. The following additional information shall be applied to the container: TANK, FUEL, AIRCRAFT, SELF-SEALING TYPE -, CLASS-, S
42、TYLE - PROTECTION LEVEL -, Model of aircraft for which cell is intended and location in the aircraft. Construction number of the cell. 4. VERIFICATION 4.1 Classification of inspections. The inspection and testing of fuel tanks shall be classified as follows: a. First article inspection (see 4.2). b.
43、 Conformance inspection (see 4.3). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-5578D 8 4.2 First article. First article inspection shall consist of phase I and phase II tests. (See 4.2.1.2 and 4.2.2.2.) For previously approved fuel cells,
44、 conformance inspections of 4.3.1 shall apply. 4.2.1 Phase I testing. Phase I tests shall consist of the tests (see 4.2.1.2) performed on materials and construction samples (see 4.2.1.1) used in the manufacture of self-sealing or dual construction fuel cells. 4.2.1.1 Phase I test samples. All phase
45、I test samples shall meet the requirements for phase I testing as specified in MIL-DTL-6396 and the following: a. Class A (flexible construction) 1. Protection levels (A) and (B) (a) A sufficient number of test cubes to fit the metal structure shown in figure 1 with panels representative of the host
46、 cavity as specified by the procuring activity. The test cube configuration and fitting(s) shall be as specified by the procuring activity. (b) Eight side panels as specified by the procuring activity (c) Eight sheets of backing material 27 by 30 inches and two sheets of backing material 30 by 30 in
47、ches. (d) Two 12 by 12-inch samples of composite cell construction. (e) One sample 6 by 6 by 0.075 to 0.125-inch inner-layer ply without barrier. b. Class B (semi-rigid or self-supporting construction) 1. Protection levels (A) and (B) (a) A sufficient number of test cubes to fit the metal container
48、shown in figure 1 or as defined by the procuring activity. The test cube configuration and fitting(s) shall be as specified by the procuring activity. (b) Two 12 by 12-inch samples of composite cell construction. c. Class A or B 1. Protection levels (C) or (D) Provided by IHSNot for ResaleNo reprodu
49、ction or networking permitted without license from IHS-,-,-MIL-DTL-5578D 9 (a) A sufficient number of test cubes to fit the metal structure shown on figure 1 with panels representative of the host cavity as specified by the procuring activity. The test cubes configuration and fitting(s) shall be as specified by the procuring activity. (b) Eight side
