1、MIL-HDBK-20b7 = 9999970 02bhSb4 774 NOT MEASUREMENT MIL-HDBK-2067(AS) 17 March 1999 SUPERSEDING 17 October 1978 MIL-STD-2067(AS) DEPARTMENT OF DEFENSE HANDBOOK AIRCREW AUTOMATED ESCAPE SYSTEMS RELIABILITY AND MAINTAINABILITY (UM) PROGRAM REQUIREMENTS FOR This handbook is for guidance only. Do not ci
2、te this document as a requirement. AMSC NIA FSC 1680 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Licensed by Information Handling ServicesMIL-HDBK-2067 9999970 02bb5b5 600 MIL-STD-2067 (AS I DEPARTMENT OF DEFENSE Washington, DC 20360 1. This Military Standard is
3、 approved for use by the Naval Air Systems Command, Department of the Navy, and is available for use by all Departments and ager.ties of the Department of Defense. Beneficial comments (recommendations , additions, deletions) and any pertinent data which may be of use in improving this document shoul
4、d be addressed to: Engineering Specifications and Standards Department (Code 93) Naval Air Engineering Center, Lakehurst, NJ 08733 by using the self addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. ii Licensed by Information H
5、andling ServicesCONTENTS Paragraph 1. 1.1 2. 2.1 2.2 3. 3.1 3.2 3.2.1 3.2.2 3.2.3 3.2.4 3.2.5 3.2.6 3.2.7 3.2.7.1 3.2.7.2 3.3 3.4 4. 4.1 4.1.1 4.1.1.1 4.1.1.1.1 4.1.1.1.2 4.1,1.1.3 4.1.2 4.1.2.1 4.1.2.1.1 4.2 4.2.1 4.2.2 4.3 4.3.1 5. 5.1 5.2 5.2.1 5.2.1.1 5.2.1.1.1 5.2.1.1.2 5.2.1.1.3 5.2,2 5.2.3 SC
6、OPE REFERENCED DOCUMENTS mirpose issues of documents Availability of documents DEFINITIONS General Terms Contractor inspection First article Aircrew automated escape system Probability of success In-service success rate Single point failure Catastrophic single point failure Degraded performance sing
7、le point failure Abbreviations, acronyms , and symbols Design evaluation program flow sequence Quantitative requirements GENERAL REQUIREMENTS Reliability System design reliability Automatic escape reliability Manual emergency egress reliability Non-emergency (mission) reliability Maintainability Sys
8、tem design maintainability Depot level maintenance System reliability demonstration System maintainability demonstration General program plan requirements General program requirements General program requirements DETAIL REQUIREMENTS First article sample Reliability and maintainability programs Block
9、 diagrams and mathematical models Effect of degrade performance upon system reliability Automated escape Manual emergency egress Non-emergency Al locations Predictions Page 1 1 2 2 3 4 4 4 4 4 4 4 4 4 4 5 5 5 6 6 6 6 6 6 6 6 6 7 7 7 8 8 9 12 12 12 12 12 12 12 13 13 13 iv Licensed by Information Hand
10、ling Services MIL-HDBK-20b7 9999970 02bb567 483 MIL-STD-2067 (AS) CONTENTS Paragraph 5.2.4 5.2.4.1 5.2.4.2 5.2.5 5.2.6 5.2.6.1 5.2.6.2 5.2.7 5.2.8 5.2.8.1 5.2.9 5.2.9.1 5.2.9.2 5.2.10 5.2.11 5.2.12 5.2.13 5.3 5.3.1 5.3.2 5.4 5.5 5.5.1 5.5.1.1 5.5.1.2 5.5.2 5.5.3 5.6 5.7 5,7.1 5.8 5.9 6. 6.1 6.2 6.3
11、6.4 6.5 Failure mode effect and maintenance action rate analyses Failure mode effect analyses Maintenance action rate analysis Single failure point summary Marginality of success Marginality of success analysis Marginality of success program establishment Environmental study Components, parts Genera
12、l Specification for MIL-S-18471 MIL-A-23 121 MIL-A-81815 AR-30 AR-105 STANDARDS MILITARY . MIL-STD-2 80 MIL-STD-470 MIL-STD-471 MIL-STD-721 MIL-STD-756 MIL-STD-757 MIL-STD-780 MIL-STD-785 -System, Aircrew Automated Escape, Ejection Seat Type; General Specification for -Aircraft Environmental, Escape
13、 and Survival Cockpit Capsule System, General Specification for -Aircrew Automated Escape Systems, General Specification for -Integrated Maintenance Management for Aeronautical Weapons, Weapon Systems, and Related Equipment -Aircrew Automated Escape System In-process Design Conformance Inspection Ar
14、ticles, Standard Pro- cedures for Evaluation of; Requirements for -Definitions of Item Levels, Item Exchangeability Models, and Related Terms -Maintainability Program Requirements -Maintainability Demonstration -Definition of Effectiveness Terms -Reliability Prediction -Reliability Evaluation from D
15、emonstration Data -Work Unit Code -Re 1 i abi 1 i ty Program Requirements 2 Licensed by Information Handling ServicesMIL-STD- 2 O 67 (AS) STANDAFDS MILITARY MIL-STD-882 -System Safety Engineering of Systems and Associated Subsystems and Equipment MIL-STD-1472 -Human Engineering Design Criteria for M
16、ilitary Systems, Equipment and Facilities MIL-STD-2070 -Procedures for Performing a Failure Mode, Effects and Criticality Analysis for Aeronautical Equipment PUBLICATIONS MILITARY MIL-HDBK-217 -Reliability Stress and Failure Rate Data for Electronic Equipment MIL-HDBK-472 -Maintainability Prediction
17、 NAVAL AIR SYSTEMS COMMAND SD-24 -General Specification for Design and Construction of Aircraft Weapon Systems 2.2 Availability of documents. (When requesting any of the All requests should be applicable documents, refer to both title and number. made via the cognizant Government quality assurance r
18、epresentative. of this standard and other unclassified standards and drawings required by contractors in connection with specific procurement functions should be obtained upon application to the Commanding Officer, Naval Publications and Forms Center (Code (1051), 5801 Tabor Avenue, Philadelphia, Pe
19、nnsylvania 19120. activity or as directed by the contracting officer,) Copies All other documents should be obtained from the Government procuring (Indices indicating the paragraphs in which the above listed specifications are cited begin on page 51. ) I 3 Licensed by Information Handling ServicesMI
20、L-HDBK-20b7 W 9999970 02bbSiL 904 W MIL-STD-2067 (AS) 3. DEFINITIONS 3.1 General. Technical terms, abbreviations, and acronyms other than those terms defined herein are defined in: MIL-STD-721, MIL-STD-882, and MIL-STD-280. The meanings of other terms used, but not defined herein, are as defined in
21、an unabridged dictionary unless otherwise indicated. 3.2 Tem. 3.2.1 Contractor. The term “Contractor“ is defined as any corporation, company, association, or individual which undertakes performance under the terms of a contract, letter contract, letter of intent or purchase orders, project orders, a
22、nd allotment, in which this document may be incor- porated by reference. For the purpose of this standard, the term “contractor“ includes government operated activities undertaking performance under an airtask, project order, or allotment, 3.2.2 Inspection. The examination and testing of systems, su
23、b- systems, components, and items to determine whether they conform to specified requirements, 3.2,3 First article. For the purpose of this standard, the preproduction or first articles shall be defined as the SRT articles identi- fied in MIL-E-9426. 3.2.4 Aircrew automated escape system. An interre
24、lated assemblage of components, assemblies, and subassemblies specifically or- ganized to perform automatically, after manual system initiation, all func- tions necessary to effect safe aircrew escape from a disabled aircraft and to return the aircrew safely to the earths surface. 3.2.5 Probability
25、of success. That probability that the total escape system functioning at the extreme required performance envelope limits, will function in a non-degraded manner to effect safe escape and recovery of aircrew. 3.2.6 In-service success rate. That percentage of ejecting aircrew who survived through sep
26、aration from the escape system and surface contact, includes many “lucky“ or “fluke“ saves from among the “out-of- envelope“ ejections, unsuccessful (non-malfunction) “out-of-envelope“ ejections, other non-malfunction fatalities, and system malfunction caused fatalities. Separation of these effets t
27、o correct the success rate to obtain a measure of in-service reliability is a matter of judgmental inter- pretation of accident data of varying veracity and as such is not as accep- table quantification of AAES reliability. 3.2.7 Single point failure. A single point failure, which, occurring by itse
28、lf, is capable of preventing successful AAES operation 4 Licensed by Information Handling ServicesflIL-HDBK-20b7 M 9VVVV7O 02bb572 840 when the AAES is functioning under any condition of escape, including the extreme required performance envelope limits. 3.2.7.1 Catastrophic sinsle point failure. A
29、single point failure which, occurring by itself, precludes continued successful AAES operation. 3.2.7.2 Degraded performance sinqle point failure. A single point failure which, by occurring, reduces AAES performance capabilities from the required extreme envelope, 3.3 Abbreviations, acronyms , and s
30、vmbols. AAES CDRL DID DMMH/FH EPA FMA ct max MOS MTTR MUA PPA SFPS SRT SSE Aircrew Automated Escape System Contract Data Requirement List Data Item Description (DD Form 1664) Direct Maintenance Man Hours/Flight Engineering Proofing Article Field Maintainability Evaluation Maximum Corrective Maintena
31、nce Time (DD Form 1423) Hours Article Marginality of Success Mean Time to Repair Mock-up Article Production Proofing Article Single Failure Point Summary Service Release Test Special Support Equipment 3.4 Desiqn evaluation program flow sequence. Figure 1, “Aircrew Automated Escape System Design Eval
32、uation Program Event Flow Sequence Diagram,“ is provided to illustrate the time and general inter- relationships between the program major elements and phases. 5 Licensed by Information Handling Services MIL-HDBK-20b7 m 9999970 02bb573 787 m MIL- STD-2 O 67 (AS ) 4. GENERAL REQUIREMENTS 4.1 Quantita
33、tive design requirements. In accordance with the contract and MIL-S-18471, (or MIL-A-23121, if applicable) , MIL-A-81815, and SD-24 the AAES shall comply with the following reliability and main- tainability requirements. 4.1.1 Reliability. A system reliability program shall be developed and conducte
34、d to ensure that the AAES will equal or better the following requirements. 4.1.1.1 System design reliability. The AAES shall be designed to achieve or better the following reliability levels for the specified operational modes. contractors should consider are presented for information in Appendix A.
35、) (General information concerning reliability- and factors 4.1.1.1.1 Automatic escape reliability. The system reliability, expressed as the probability that the MS shall perform successfully and automatically following system manual initiation -all escape capabilities (including the extreme limits)
36、requirements specified in the contractual documents, shall be equal to or better than 0.98 at the 90 percent lower confidence level. 4.1.1.1.2 Manual emergency egress reliability. The system relia- bility, system shall perform successfully upon actuation to permit safe, rapid manual egress, shall be
37、 at least 0.98 at 90 percent lower confidence level. 4.101.1.3 Non-emergency (mission) reliability. The System reliability expressed as the probability that the AAES shall perform successfully all aircraft/mission requirements specified in the contractual documents, shall equal or better requirement
38、s specified in aircraft sub- systems allocations. 4.1.2 Maintainability. A system maintainability program shall be developed and conducted to assure that the AAES will equal or better the following requirements: 4,1.2.1 System design maintainability. The MS shall be de- signed to achieve at least th
39、e followins maintainabilitv levels for oDera- tional employment (more stringent maintiinability level; may be requiked by aircraft subsystem allocations) : a. Based upon a flying hour rate of 35 hours/month, the DMMH/FH (Direct Maintanence Man Hours/Flight Hours) at organizational and intermediate m
40、ainte- nance levels for corrective and preventive mainte- nance, including the preparation of items to be inserted into the AAEC, shall not exceed 0.05 hours for a single ejection seat AAES. (The Licensed by Information Handling ServicesMIL - STD- 2 O 6 7 (AS) DMMH/FH may be adjusted by the Governme
41、nt procuring activity for application to a multiple seat system. In addition, the Government procuring activity may adjust the DMMH/FH for different flying rates to assure that the total DMMH/month/aircraft remains less than 1.75 hours.) b. The M“R (Mean Time to Repair) shall not exceed 0.85. C. The
42、 the models shall be revised as necessary to reflect the AAES. The models shall relate directly to the quantitative requirements of 4.1, 5.2.1.1 Effect of degraded performance upon system reliability. 5.2.1.1.1 Automated escape. Although when reverting to a redun- dant or back-up mode of operating,
43、the total escape system may not have incurred a total failure; if the alternative mode is incapable of achieving the herein required extreme performance limits tute a failure for the purposes of calculating system reliability, i. e. - R 1-l? - sys. 1 Failure Auto . Escape that rever See Figure 3. a.
44、 Item identification and nomenclature b. Failure mode, cause, and effect c. Rationale for acceptability d. Probability of occurrence e. Recurrence control 5.2.6 Marqinality of success. To assist in th- early detec- tion, identification and correction of AAES operation inconsistent with specification
45、 requirements, system requirements and/or good design prac- tices (including adequate safety factors) , the contractor AAES reliability program shall provide for, and require, the thorough, detailed post-test evaluation of (a) all test articles and (b) all test data to determine the marginality of s
46、uccess, and, if marginal, the cause(s). The contractor shall prepare, submit to thee Government procuring activity for approval, and, following approval, implement a marginality of success plan. The plan may be integrated into the test plan required under MIL-E-9426. Test data shall be recorded and
47、treated in a manner aiding the detection of operating anoma- lies and shall be examined for operating results and/or statistical distri- bution of operating results trending near specification limits and/or con- siderably out of line with previous results. Cause(s) shall be determined for all anomal
48、ies identified in the test articles and/or test data. Test articles shall be examined for non-operating components, excessive wear, damage or other signs of unusual behavior, failure and/or incipient failure and the cause(s) shall be determined. In addition, a record shall be main- tained for all te
49、st articles, presenting for each test the physical relation- 14 Licensed by Information Handling Services MIL-HDBK-2067 = 9999970 02bb582 79T MIL- STD- 2 O 6 7 (AS ) ships (location, orientation, etc.) of test article components to each other and the pretest quality assurance test article assembly/component critical characteristics records. All anomalies identified shall be documented and evaluated to ascertain their potential for inducing failures in service, to ascertain the consequences of such failures, and to determine recommenda- tions for appropriate remedial action and shall be
