1、 A -51-13 .-. MIL-M-L7b33B (2) bL 777770b ClO7bb11 b !4IL-M-i96338 (SHIPS) 1, under “SPECIFICATIlXS, XILITARY“ add : .YIL-H-46855 - Human Engineering Requirements for Xilitary Systems Equipment and Facilities.“ . 2.1, add the following Military standards, handbooks and publications: “CTANARDS MILITA
2、RY . MIL-STD-415 - Test Points and-Test Facilities for .Electronic Systems and Associated Equipment, Desiqn Standard Por. XIL-STD-470 - Xaintainability Program Requirements (for Systems and Equipments) .“ !IIL-STD-471 - .Hainfainability Demonstration. MIL-STD-785 - Requirements for Reliability Progr
3、am (for Systems and Equipments). MIL-STD-1399, Section 103 - Electric Power, Alternating Current. “HANDBOOKS MILITARY . MIL-HDBK-217 - Reliability Stiess and Failure .Rate Data for. Electronic Equipment. MIL-ADBK-472 - Maintainability Demonstration. .- “PUBLICATIONS MILITARY 0967-312-8010 - Maintain
4、ability Design Criteria Handbook for Design of 0367-048-0010 - Maintainability Design Criteria Handbook for Designers 0969-019-7000 - Electronic Test Equipment Application Guide. Pages 6 and 7 3.2.23, item (a), line 1: Delete “any number (up to 4) of“ and substitute “two or Shipboard Electronic Equi
5、pment. of Shipboard Electronic Equipment. three a. 3.2i23.1: items (a) and (b). In line 7, delete the colon after *sources* and substitute a period; delete PROM PREVIOUS ISSUE. THE OUTSIDE MARGINS OF THIS IXXW4ENT HAVE BEEN MARKED *#“ TO =TmERE CUANGECETIONS, ADDITIONS, ETC.) FROM THE PREVIOUS ISSUE
6、 HAVE BEEN WE. THIS HAS BEEN DONE AS A CONVENIENCE ONLY AND THE GMIERWlENT ASSUMES NO LIABILITY WHATSOEVER FOR ANY XNACCURACIES IN THESE NOTATIONS. BIDDERS AVD CONTRACTORS ARE CAUTIONED TO EVALUATE THE REQUIREMRiTS OF THIS DOCUMENT BASED ON THE ENTIRE CONTENT AS WRITTEN IRRESPECTIVE OF THE MARGINAL
7、NOTATIONS AND RELATIONSHIP TO THE LAST PREVIOUS ISSUE. I P FSC 6125 P Licensed by Information Handling ServicesMIL-M-19633B (SHIPS) AMENDMENT-2 Pages 6 and 7 (contad.) 3.2.5: Delete “Load rating (3.2.l(b) U) t 3.3.2 through 3.3.4: Delete and substitute: “3.3.2 Reliabilrt To meet the needs of the Nav
8、al service, it is imwrative that reliability odbe considered of prime importance in the design and manufacture of the equipment, The supplier shall employ all reasonable methods possible in the process of Pianufacture to assure quality and maximum reliability. reliability under all service condition
9、s to avoid marginal applications and provide adequate safety factors,-it may be necessary to derate certain parts from their rated values when - applying them to equipment circuits. The design shall include all possible features which will result in reliable and stable operation with minimum need fo
10、r adjustment and alignment,. and with Mean-Th-Between-Failures (MTBF) not less than 2500 hours for the entire motor generator and associated control system. function or its performance degrades below the requirements of this specification. “Bow to We a Reliability Prediction Based on Stress Factors
11、and Part Populations“ shall be used for the method of prediction and report format. The most critical items shall be identified in reliability prediction in accordance with MIL-SD-785 (see 6.3). . t “3.3.2.3 Failure rate data used shall be as given primarily in MIL-HDBK-217. Failure rate data from o
12、ther sources or estimated failure rates, if necessary, shall be submitted to the procuring activity for review prior to use. herein are used for failure rates derivation, detailed substantiation shall be qiven. No acceleration factors shall be used unless justified by special quality assurance contr
13、ols and justification submitted. # “3.3.2.4 Stress levels shall be calculated from design data in accordance with MIL- . HDBK-217. The operating electrical and thermal stress levels shall be obtained during the tests of 4.6.21 and 4.6.22. application ratings (maximum stress levels allowed) given by
14、part or unit vendors and the. calculated stresse levels using tabular form. Where parts are found by test or calculation to be stressed beyond the application rating (maximum stress level) necessary design changes . shall be made and stress level tests shall be repeated. Where the test and calculate
15、d values differ by mre than 10 percent a second stress calculation .shall be made on that part to determine cause of discrepancy. failure in tem of actual equipment configuration to the procuring activity for review. which shall be integrated with the equipment design engineering program. ability pr
16、ogram shall be consistent with the type and complexity of equipment, and shall contain but shall not be limited to the following: In order to insure high equipment t t .“3.3.2.2 The MTBF shall be predicted in accordance with MIL-HDBK-217. The section “3.3.2.1 Equipment failure is defined as occurrin
17、g when either the equipment ceases to . In the event other sources than quoted The stress levels obtained by test shall be compared to the # . *3.3.2.5 The supplier shall submit the Reliability Predictions and definition of # “3.3.3 Maintainability. The supplier shall establish the maintainability p
18、rogram The maintain- (a) Maintainability program plan. (b) “3.3.3.1 MTTRG for the equipment shall be 2 hours maximum. Maintainability analysis and corrective action system. The maintainability shall be defined in terms of Geometric-Xean-Time-To-Repair t (MTTRG). any one item shall not exceed 6 hours
19、. Equipment repair time (ERT) for t “3.3.3.2 The supplier shall define in the Maintenance Program Plan how he will develop . compute MTTRG predictions and submit them to Fe procuring activity for review. t. and conduct the maintainability program to meet the quantitative requirements. He shall .3.3.
20、3.3 prediction procedure II. The failure rates used shall be the same as used for the relia- bility prediction. Wherever the expected life of the part or unit is shorter than the expected life of the equipment, the replacement of the part or unit shall be scheduled in the preventive maintenance sect
21、ion of the technical manual for the equipment so as to pre- vent equipment failures due to wear out of its parts. The MTTR, shall be predicted in accordance with MIL-HDBK-472, maintainability Page 2 of 6.pages Licensed by Information Handling Services# # I # # # # # # # NIL-H-196 33B (SHIPS) AMENDME
22、NT-2 Pages 6 and 7 (contd.) -3.3.3.4 Preventive maintenance shall be simplified ao as to reduce the need for highly skilled maintenance personnel. The complexity of maintenance shall be reduced by providing adequate accessibility, and clearance, and by providing for interchangeability of like units
23、and parts. All essential parts shall be interchangeable physically and electrically with corresponding repair parts without selective matching, drilling, filing, or use of undue force. positive detection of malfunction or degradation (implementation of indicators, test points, and so forth), ease of
24、 fault corrections, and rapid positive verification of correction. . “3.3.3.6 Equipment shall be subjected to a maintainability demonstration test. Sample size of corrective maintenance actions shall be 20, sample selection in accordance with the Task Selection appendix, “Corrective maintenance samp
25、le selection“ table of MIL-STD-471 (ice 6.3). “3.3.3.5 Corrective maintenance downtime shall be reduced by designing for rapid and ?!TTR, shall be computed by the following formula: . ill P log MTTRG = where 14ci is the repair time of corrective maintenance action “i“ repair time includes fault loca
26、tion, isolation, replacement f part.(s) and realignment or readjustment as necessary through final checkout. A maintenance test plan shall be prepared and submitted to the procuring The plan shall defina in detail the main- -3.3.3.6.1 activity for review before the tests commence. tainability action
27、s to be performed during the test. selection of failure events to be chosen at the time of the test. submitted to the procuring activity. The plan shall provide for random 3.3.3.6.2 A report of the maintainability test shall be prepared by the supplier and “3.3.3.7 Data collection. The supplier shal
28、l establish and maintain a data collection system coveringmlure modes and effects, analysis, and corrective action throughout all stages of development, production and testing of the equipment. Any failure that occurs shall be thoroughly analysed and recorded in the log book. implemented and design
29、review shall be initiated as necessary to improve the reliability and maintainability of the equipment and to meet the quantitative requirements. and actions taken shall be reported to the procuring activity in two renorts: first delivery and (b) with the last equipment delivered. - “3.3.3.8 keep ma
30、intenance requirements to a minimum, both in level of skills and in number of per- sonnel required to maintain the equipment. The equipment shall also be designed so that it can be maintained by replacement of easily removed parts,.modules, or subassemblies. The design shall follow design for mainta
31、inability considerations in MIL-STD-470 (see 6.3) and NAVSHIPS 0967-312-8010. The corrective action shall be All failures (a) Drior to The control equipment shall be designed to permit easy installations and to “3.3.3.9 Human en ineerin re uirements Human engineerinq requirements shall be in accorda
32、nce withxH MTN: AN/USM-123: G. E. Simpson Hodel 269 or equivalent. OSCfllOSCOpe - PSN: P6625-787-0309, MTN: AN/UCM-117. 931-4904-003. D. C. milliammeter - O to 150 ma range: PSN: 2N6625-945-2759: MTN: CV Page 3 of 6 pages Licensed by Information Handling ServicesMIL-M-196 338 SHSPS) WENDMENT-2 (e) (
33、f) A. c. voltmeter - O to 600 volts range, FS?i 1%6625-184-5337; HTN: An isolated variable voltage d. c. wer supply O to 35 volts (O to 3 amp . capacity). . MR71W600ADW in accordance with MIL-M-16034. Suppliers desiring to utilize test equipment other than specifit atter first sentence, add; Relay s
34、hall be suitable for connection so that when generators are not being operated in parallel, no electrical connections will exist between generators or associated controls. -i 3.5.4.8, item (b), second sentence: Delete and substitute A relay may be used in the # .Page 21 %. -. . 3.5.4.11, delete and
35、substituter “3.5.4.11 Circuit breakers. Circuit-keakers, when required, (see 3.5.2.1) shall be Cirauit breakers shall be provided with a G element type AQB conforming to Mh-C-17361. (generator protection) and shall include an auxiliary switch and a 115 volt, d. C. shunt trip device. . Page -4 of 6 p
36、ages Licensed by Information Handling Services1 # i # # Y HIL-M-19633B (CIIIPS) AMEPDMENT-2 Page 21 (contd.) 3.5.4.15, add new sentence: “An off-on switch shall be provided to disconnect the syn- chroscope from the line when not in use _. Add as new paragraph 3.5.418: “3.5.4.18 Reverse power .rotect
37、ion. The shunt trip on the circuit breaker shall be electrically int-d with Ge motor controller in such a manner that deenergizing the mtor controller will result in the activiation of the shunt trip on the circuit breaker.“ Page 24 3.7.3, item (a): Delete “ (5 sheets maximum) .“ 3.7.3, add as item
38、(g): “(9) Water cooler drawing assembly and details (2 sheets maximum).“ Pages 26, 27, 28 and 29 3.7.3.4: In iten (cl (l)c, after “terminals insert and test points; and in item (d) (l)b, after “subassemblies“ insert an all test points“. , Pages 30 and 31 3.8# item (9) (3): In line 3# delete “Open lo
39、op test“ and substitute “Open loop tests- Give detail instruction on performing open loop tests and explain how the results of these tests are used in localizing faults in the equipment“! and delete lines 5 and 6 and substi- tute “Tables showing test points of measurements of voltage, current, resis
40、tance and a brief description of how and when each test point should be used.“ 4.1# delete and substitute: 4.1 Res nsibilit for ins ction. Unless otherwise specified in the contract or purchase oraerythe suppiiris rzponslble for the performance of all inspection require- nent8 aa specified herein. E
41、xcept as otherwise specified in the contract or order, the supplier may use his own or any other facilities suitable for the performance of the inspec- tion requirements specified herein? unless disapproved by the Government. The Government reserves the right to perform any of the inspections set fo
42、rth in tiie specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements, “ 4.2# last line: Add “(see 6.1 and 6.3)“. . 4.3.2, line Sr Delete inspector“ and substitute “GOvernment“. Page 33 4.4.1? first sentence: Delete and subsitute: “4
43、.4.1 4.4.3, delete and substi tute: Test results shall be recorded by the s,upplier on test form prepared by the supplier. “ “4.4.3 All test data shall be witnessed and verified by a qualified test engineer Upon completion, one file copy of all periodic prior to the shipment of the equipment. test d
44、ata shall be forwarded to the command or agency concerned.“ Page 34 4.6.7.2, line 3: Delete “inspector“ and substitute aGovernnu?ntm. Pages 40 and 41 4.6.22.2, line 9: Delete “table I“ and substitute “table II“. Page 5 , of 6 pages . Licensed by Information Handling Services1 - . MIL-M-17633B (2) 61
45、 a 7777906 0087bb7 5 MIL-M-196338 (SHIPS) AME2iDIlENT-2 Pages 40 an2 41, icontd.) . 4.6.22.4, item ih): Delete Ufer all parts”. 4.6.22.5: Add “ileatinq tests shall be made anly with the equiomcnt comnfetely assembled and mounted in the manner for which it is designed, Barriers shall be placed a?jace
46、nt to the enclosure, 2 inches from the back and each si8e. Iieatinn test readings shall be taken on all coil windings (including Dower transformers and resctors) and rectifiers except for those rectifiers of control circuits which clearly do not contribute to the overall tempera- ture rise within th
47、e equipment enclosure and except for those which are tested and given separate qualification approval under its individual specification. For those parts which are given exception based on separate qualification approval, it shall be determined that its adjacent ambient within the enclosure 6es not
48、exceed the rated ambient of the part and I that the application rating does not exceed the manufacturers approved rating at the applied temperature ambient. Pages 45/46 # 6.1, add as items (h) and (i): “(h) Reliability and maintainability calculation required (see 3.3.3.111.” ” (i) Quality assurance
49、 requirements (see 4.2). Add as 6.3: .6.3 Mana ernent control s stem documents, The following management control system . t documents sbn=on?kforn 1660: (a) MIL-STD-785 (see 3.3.2.2). (b) MIL-STD-471 (see 3.3.3.61, (c) MIL-STD-470 (see 3.3.3.8 and 3.5.5.11). (d) MIL-I-46855 (see 3.3.3.9). (e) MIL-Q-9858 (see 4,2) Page 47 10.1, last sentence: Delete and substitute: ”This list is not an all inclusive list and additions and deletions as apoicable can 30.1.2, lines 2 and 3: Delete “Government”. be made by the manufacturer. Preuaring ac
