MIL-STD-1798 Mechanical Equipment And Subsystems Integrity ProgramThe purpose of this standard is to describe the general process to achieve and maintain the physical and functional integrity of the mechanical elements of aircraft systems. The goal of this integrity program is to achieve the desired level of safety and aircraft availability at the most economic cost across the life cycle of the weapon system. This standard allows the process to be tailored in a competitive environment to meet specific equipment, subsystem, and/or system requirements. The Mechanical Equipment and Subsystems Integrity Program MECSIP is implemented in the planning process and continued until retirement of the system.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 23 - 24 - 25 - 26 - 27 - 28 - 29 - 30 - 31 - 32 - 33 - 34 - 35 - 36 - 37 - 38 - 39 - 40 - 41 - 42 - 43 - 44 - 45 - 46 - 47 - 48 - 49 - 50 - 51 - 52 - 53 - 54 - 55 - 56 - 57 - 58 - 59 - 60 - 61 - 62 - 63 - 64 - 65 - 66 - 67 - 68 - 69 - 70 - 71 - 72 - 73 - 74 - 75 - 76 - 77 - 78 - 79 - 80 - 81 - 82 - 83 - 84 - 85 - 86 - 87 - 88 - 89 - 90 - 91 - 92 - 93 - 94 - 95 - 96 - 97

MIL-STD-1798C

5.2.5                Supportability planning.....................................................................................21

5.2.6                Prognostic Health Monitoring (PHM) planning..................................................21

5.2.7                Initial Failure Modes Effects and Criticality Analysis (FMECA) .........................21

5.2.8                Initial Hazard Analysis (HA) .............................................................................21

5.2.9                Component classification .................................................................................22

5.2.10              Aviation-Critical Safety Items ...........................................................................24

5.2.11              Prevention of failure for Safety-Critical Parts....................................................24

5.2.12              Design criteria..................................................................................................25

5.2.12.1           Damage tolerance design concepts .................................................................25

5.2.12.2           Other design concepts .....................................................................................28

5.2.12.3           Design Criteria for in-direct failure mode effects...............................................29

5.2.12.3.1        Uncontained failure control ..............................................................................30

5.2.12.3.2        Components operating in a flammable zone ....................................................30

5.2.12.3.3        Components operating in a flammable fluid leakage zone ...............................30

5.2.12.3.4        Flammable fluid carrying line and wire harnesses............................................30

5.2.12.3.5        Electromagnetic compatibility...........................................................................30

5.2.13              Aerospace castings..........................................................................................30

5.2.13.1           Casting requirements.......................................................................................30

5.2.13.2           Guidelines for digital radiography (DR) inspections of castings........................30

5.2.14              Maintenance concepts .....................................................................................31

5.2.15              Electrical Wiring Interconnect System (EWIS) Design Actions, Task One

(See EWIS MIL-HDBK-525 for more details.)...................................................31

5.2.16              Product Integrity Control Plan ..........................................................................31

5.2.17              Identify Technical needs (Task II) ....................................................................32

5.2.18              Update the MECSIP Master Plan.....................................................................32

5.3                   (Task III) Design Analyses and Development Tests.........................................33

5.3.1                Manufacturing and quality assessment. ...........................................................33

5.3.2                Design analyses...............................................................................................33

5.3.2.1             Load analyses..................................................................................................33

5.3.2.2             Design stress/environment spectra development.............................................33

5.3.2.3             Performance and function sizing analyses .......................................................33

5.3.2.4             Thermal/environmental analyses and tests ......................................................34

5.3.2.5             Stress/strength analyses..................................................................................34

5.3.2.6             Durability analyses...........................................................................................34

5.3.2.7             Damage tolerance analyses.............................................................................34

5.3.2.7.1          Damage tolerance inspections.........................................................................35

5.3.2.7.2          Damage tolerance action categories and guidance..........................................35

5.3.2.7.3          Fail-safe...........................................................................................................35

5.3.2.7.4          Slow damage growth .......................................................................................35

5.3.2.7.5          Leak before burst.............................................................................................35

5.3.2.7.6          Proof test analysis............................................................................................36

5.3.2.8             Risk-based analyses........................................................................................36

5.3.2.9             Vibration/dynamics/acoustic analyses..............................................................36

5.3.3                Development tests ...........................................................................................36

5.3.3.1             Material characterization tests..........................................................................36

5.3.3.2             Design development tests................................................................................37

5.3.4                Flight Control Systems analysis and test..........................................................37

5.3.4.1             Dynamic modeling (flight control) .....................................................................37

5.3.4.2             Failure detection and accommodation (flight control) .......................................37

5.3.4.3             Stability and response (flight control) ...............................................................37

v