1、 -,- MIL-T-832298 17 W 9999906 0205771 2 m o -2s -AO MILITARY SPECIFICATION TRAILER, AIRCRAFT ENGINE (ETU-91/E) MEL-T-83229B(USAF) 22 Jul 85 SUPERSEDING MIL-T-8 3229A(U SAF) 8 Apri-1 1974 This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.
2、1 Scope. This specification covers an aircraft engine trailer, designated ETU-91/E. 2. APPLICABLE DOCUMENTS * 2.1 Government documents. * 2.1.1 Specifications, standards, and handbooks. Unless otherwise speci- fied, the following specifications, standards, and handbooks of the issue listed in that i
3、ssue of the Department of Defense Index of Specifications and Standards (DoDISS) specified in the solicitation form a part of this speci- fication to the extent specified herein. SPECIFICATIONS MILITARY * MIL-P-116 Preservation, Methods Of MIL-M-809 O Mobility, Towed Aerospace Ground Equipment, Gene
4、ral Requirements For STANDARDS MILITARY MIL-STD-129 MIL-STD-130 MIL- STD-28 1 MIL-STD-831 MIL-STD-882 * MIL-STD-1186 Marking for Shipment and Storage Identification Marking of U. S. Military Property Automobiles, Trucks, Truck-Tractors, and Trailer Dollies, Preservation and Packaging Of Test Reports
5、, Preparation Of System Safety Program Requirements Cushioning, Anchoring, Eracing, Blocking, and Waterproofing, with Appropriate Test Methods - -_I Beneficial comments (recommendations, additions, deletions) and any pertinent I data which may be of use in improving this document should be addressed
6、 to: the Engineering Division, San Antonio Air Logistics Center/MMEDO, Kelly AFB, Texas 78241 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by I letter. FSC 1740 DISTRIBUTION STATEMENT A. Approved for public release;
7、 distribution unlimited. THIS DOCUMENT CONTAINS ,f PAGES Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-T-8 3 229B (USAF) * 2.1.2 Other Government documents, drawings, and publications. The following other Government documents form a part of th
8、is specification to the extent specified herein. I DRATJINGS United Aircraft Products, Incorporated UA533560-2 Trailer, Aircraft Engine ETU-91/E * 2.1.3 Other publications. The following documents form a part of this specification to the extent specified herein. The issues of the documents which are
9、 indicated as DoD adopted shall be the issue listed in the current DoDISS and the supplement thereto if applicable. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM D 3951-82 Packaging, Commercial I (Application for copies of ASTM publications should be addressed to the American Society for Te
10、sting and Materials, 1916 Race Street, Philadelphia, Pennsylvania 19103.) (Copies of specifications and standards required by manufacturers in con- nection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer.) * 2.1.4 Order o
11、f precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specif ication shall take precedence. 3. REQUIREMENTS * 3.1 First afrticle. When specified, a sample shall be subjected to first article inspection (see 4.4 and 6.3). 3.2
12、 General requirements. The requirements of United Aircraft Products, Znc. drawing UA533560-2 apply as requirements of this specf ication. 3.3 Identification of product. Equipment, assemblies and parts shall be marked for identification in accordance with MIL-STD-130. 3.3.1 Safety. To the extent spec
13、ified by the procuring activity, the provisions of MIL-STD-882 shall apply. 3.4 GiorkmanshiE. The trailer, including all parts and accessories shall be fabricated and finished in a thoroughly workmanlike manner. attention shall be given to freedom from blemishes, defects, burrs, sharp edges, accurac
14、y of dimensions, and markings of parts and assemblies. Particular 2 - I. . 0. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Y- MIL-T-32278 17 m 77777Ob 0205773 b 0 I O a a MIL-T-8 3 229 B (USAF) 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility fo
15、r inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements as specified herein. specified in the contract or order, the contractor may use his own or any other facilities suitable for the performance of
16、 the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the speci- fication where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. Ex
17、cept as otherwise 4.2 Classification of tests. The inspection and testing of the trailer shall be classified as follows: a. First Article Inspection. (See 4.4) b. Quality Conformance Inspection. (See 4.5) 4.3 Test -condftions. 4.3.1 Standard test conditions. Unless otherwise specified herein, all te
18、sts shall be conducted under room conditions with the temperature at 25“ +lO“C, the relative humidity at 90 percent or less, and the barometric pressure at 28 to 32 inches Hg. 4.3.2 Apparatus and instruments. Apparatus and instruments used in con- junction with the testing specified herein shall be
19、of laboratory precision type, checked to ascertain that they have been installed for durability and - - accurate operation, and calibrated at intervals properly spaced to assure laboratory efficiency. 4.3.3 Mockup engine. A dead weight load equivalent to the configura- tional dimensions, 12,000 poun
20、d capacity, center-of-gravity position, and mounting provisions of the bare engine load shall be provided and utilized for test purposes. attachment fittings simulating those of the actual engine. The bare engine load shall be handled by sling and 4.3.4 Data. During the testing specified herein, suf
21、ficient data chal. be recorded at proper intervals to insure compliance of the trailer with the performance requirements specified. time, and ambient temperature at which the test is conducted as well as the data needed to accurately calculate the performance rates, efficiencies, et cetera, to be de
22、termined by the specific tests. Recorded data shall include the date, Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL- T- 8 3 2 2 9 B (US AF) 4.3.5 Failure during test. Characteristics exhibited by the trailer during any of the tests specified h
23、erein that would cause the trailer to fail any of the requirements specified herein while in service shall constitute failure of the unit to pass the test and shall be the basis for rejection. 4.4 First Article Inspection. 4.4.1 m. tests specified in 4.4.4. One trailer shall be subjected to the firs
24、t article * 4.4.2. Test report. Upon completion of the first article tests, a first article test report in accordance with MIL-STD-831 shall be prepared and three copies of the report furnished to the procuring activity. * 4.4.2.1 Reliability and maintainability information. The following infor- mat
25、ion shall be submitted as a separate attachment accompanying the first article test report (same quantity and quality of copies) or shall be included as part of that report: a. All failures, maintenance, and other events recorded shall be identi- fied by accumulating operating time, miles, cycles, o
26、r position in the test procedure as appropriate. operations shall be recorded. Test conditions during failures and irregular b. A summary of the engineering analysis and of any tests conducted to determine assignable causes for any failures and irregular operations. c. A summary of the engineering a
27、nalysis behind any corrections made, to be made on production units, or proposed to be made and behind the predicted effectiveness of those corrections. d. Clock time and manhours required for each maintenance and servicing action during the tests. A brief description of the qualification and experi
28、ence of the personnel involved shall be included and shall be adequate to allow comparison to the personnel anticipated in similar field work. * 4.4.3 First Article test sample for the procuring activity. After sub- mission of the first article test report, the contractor shall retain the pre- produ
29、ction test sample at his plant in operating condition pending the follow- ing 3ctions by the procuring activity: a. Review of the mechanical construction b. Performance of any test, included in the specification, after reviewing the contractors test report. c. Notification of final acceptance, J; 4.
30、4.4 First Article tests. The first article tests shall consist of all the tests described under 4.6, conducted in the same order. 4.5 Quality conformance tests. The quality conformance tests shall con- sist of the following: - _- -4- - - -. O Provided by IHSNot for ResaleNo reproduction or networkin
31、g permitted without license from IHS-,-,-MIL-T-83229B 17 997990b 0205795 T 6 MIL-T-8 3229B (USAF) a. Individual tests (See 4.5.1) b. Sampling tests (See 4.5.2) 4.5.1 Individual tests. Each trailer shall be subjected to the following tests as described under 4.6: a. Examination of product (See 4.6.1)
32、 b. Operational tests (See 4.6.2) 4.5.2 Sampling test. One trailer shall be selected at random from every ten or fraction thereof and subjected to 10 percent of the test specified in 4.6.6. 4.5.2.1 Rejection and retest. When one trailer selected from a pro- duction run fails to meet the specificatio
33、n, trailers still on hand or produced later shall not be accepted until the extent and cause of failure have been determined and appropriately corrected. The contractor shall explain to the Government representative and notify the procuring activity in writing the cause of failure and the action tak
34、en to preclude recurrence. After correction, all of the tests shall be repeated. 4.5.2.1.1 Individual tests may continue. For operational reasons, But final acceptance of the individual tests or other sampling plans may be continued pending the investigation of a sampling test failure. trailers on h
35、and or produced later shall not be made until it is determined that all trailers meet all the requirements of the specification. 4.5.2.1.2 Defects in trailers already accepted. The investigation of a test failure could indicate that defects may exist in trailers already accepted. If so, the-contract
36、or shall fully advise the procuring activity of all the defects likely to be found and the methods of correcting them. 4.6 Test methods 4.6.1 Examination of product. The trailer shall be examined to determine conformance to the requirements of this specification with respect to dimensions, quality o
37、f workmanship, materials, design of finishes, markings, and visible defects, and the functional operation of all components, assemblies, accessories, and controls. Particular attention shall be given to leakage in the hydraulic system, and the routing and protection of hydraulic lines. 4.6.2 Operati
38、onal tests. The trailer shall be operated under the following conditions to insure that the various components and capabilities comply with the requirements specified herein. ,During this performance demonstration, all components shall be operated according to the instructions provided with the trai
39、ler. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-T-83227B i7 777706 020579% L - - MIL-T-83229B (USAI?) 4.6.2.1 Engine installation and removal. The trailer length shall be adjusted to the retracted position and the mockup bare engine configu
40、ration shall be hoisted into position on the trailer. mounted on the trailer with particular attention given to the compatibility of the trailer mounting supports and engine fixtures. The lift mechanism shall be operated through the entire range of travel and the safety lock. capability shall be dem
41、onstrated. . The engine shall be 4.6.3 Mobility tests. While supporting the rated capacity load, the trailer shall be tested for type I, group C mobility in accordance with MIL-M-8090, with the following exceptions: 4.6.3.1 Towing distances. The towing distances shall be 50 miles over level paved hi
42、ghway type surface and 50 miles over the type I test course. Fifty percent of each test distance shall be with the trailer in the extended position and the remaining fifty percent in the retracted position. 4.6.3.2 Towing speeds. Towing speeds for the paved roads shall be 10 fl mph and 5 21 mph for
43、the type I test course. 4.6.3.3 Rear steering. The manual operation and lockout capabilities of the rear steering mechanism shall be demonstrated. 4.6.4 Excessive load-indicator test. A test shall be performed to demonstrate that the excessive load indicator provides a visual indication that loads o
44、f 3.5g or greater have been transmitted to the mounted engine during mobile operat ions. 4.6.5 Static proof load tests. 4.6.5.1 A static proof down load of 24,000 pounds shall be applied to the trailer through the engine mounting supports. The trailer length shall be extended; the lift mechanism sha
45、ll be centrally positioned; and the safety locks shall be disengaged. Footpads shall be clear of the ground line. The load shall be maintained for 3 minutes without evidence of leakage, instability, or permanent deformation of any component or part during or after completion of the test. I B 4.6.6 E
46、ndurance tests. The lift mechanism shall be operated through its entire range capability for 50 cycles, while the trailer is supporting the bare mockup engine. be removed and reinstalled on the trailer mounting supports. extension and retraction mechanism shall then be operated through 50 cycles. At
47、 the completion of every fifth cycle, and while the trailer is in the retracted position, the bare mockup engine shal be installed and removed from the trailer mounting supports. or unsatisfactory operation resulting from the endurance tests shall be cause for rejection. At the completion of every f
48、ifth cycle, the engine shall “he trailer Failure, deterioration, undue wear, 4.6.6.1 Leakage inspection. During the endurance tests, the trailer shall be inspected for leakage. shall show no leakage. glands that can be tightened during the endurance test to stop leakage that may have occurred, such
49、adjustments will be acceptable. Fluid lines, fittings, pumps, and other components However, if pumps and oeher equipment have packed Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- ii o e o MIL-T-83227B 17 M 7777706 0205777 3- MIL-T-83229B(USAF) 4.6.7 Reliability demonstration and test. Satisfactory completion of all tests specified herein shall be a demonstration of compliance wit
